JP2822947B2 - Camera with zoom lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a zoom lens, and more particularly to a camera having an interchangeable zoom lens.

[0002]

2. Description of the Related Art There has been proposed a camera capable of power zoom in which a zoom lens is driven by a driving force of a motor to change a focal length. In these cameras, when the main switch of the camera is turned off, it is inconvenient to carry or store the camera if the zoom lens is in a protruding state. Therefore,
In some cameras, when the main switch is turned off, the zoom lens is driven to the wide end or retracted past the wide end to reduce the size when the camera is not used. For example, in a lens shutter type camera in which a lens cannot be replaced, the camera is set to a wide end or a retracted position.

In the interchangeable lens camera disclosed in Japanese Patent Application Laid-Open No. 63-5331, the lens having the shortest length at the extreme end of the focus range is driven to the most retracted state. ing. In the case of an interchangeable lens type camera, there is no problem as long as the lens length is the shortest at the end position of the lens driving range, as disclosed in Japanese Patent Application Laid-Open No. 63-5331. However, if the lens has the shortest overall length at the middle position of the drive range, not at the extreme end of the drive range, the entire lens length does not become the shortest even when driven to the extreme end.

[0004] If the camera cannot be replaced with a lens, there is no problem if the focal length at which the overall length becomes the shortest is stored. It is impossible to store all of them on the camera side.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a zoom lens which can be interchangeably mounted in an interchangeable lens camera. Even when the focal length at which the overall length becomes the shortest is not necessarily the wide end, the most compact form when the camera is not used is to facilitate carrying and storing the camera.

[0006]

According to the first aspect of the present invention, as shown in FIG. 1, an interchangeable lens having a variable focal length changes its entire length in accordance with a change in the focal length. A photographing lens 100 that stores information on the focal length of the photographing lens, a main switch 101 that switches between a position where the operation of the camera is permitted and a position where the operation is prohibited, a driving unit 102 that changes the focal length of the photographing lens, Determining means 103 for determining whether or not the entire length of the lens is the shortest
And control means 104 for controlling the driving means so that the total length of the lens becomes shortest when the main switch is switched to the operation prohibition position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. When using the camera, the main switch 101 is set to the position (O
N). At this time, the driving unit 102 can change the focal length of the photographing lens 100. The photographing lens 100 is an interchangeable lens having a variable focal length, and the overall length changes according to a change in the focal length. Information about the focal length when the overall length is the shortest is stored in the photographing lens 100, and this information is read by the camera body side, and the determining means 103 determines whether or not the overall length of the photographing lens 100 is the shortest. It is possible. Next, when the camera is not used, the main switch 10
1 is switched to a position where the operation of the camera is prohibited (OFF position). At this time, the driving unit 102 is controlled by the control unit 104 so that the overall length of the lens becomes the shortest.

As described above, the focal length at which the total lens length becomes the shortest is stored for each photographing lens, and control is performed so that the total lens length becomes the shortest when the main switch is turned off. In the camera described above, even when a zoom lens having the shortest overall lens length is mounted not at the wide end of the zoom range but at the middle position of the zoom range, the most compact form can be obtained when the camera is not used.

[0009]

An embodiment of the present invention will be described below.
FIG. 2 shows the appearance of a camera body BD to which the present invention is applied, and FIG. 3 shows the appearance of an interchangeable lens LE attached to the camera body BD. Hereinafter, the names and functions of the respective units will be described.

Reference numeral 1 denotes a main switch. When the main switch 1 is turned on, the camera body BD is in an operable state, and when the main switch 1 is off, the camera body BD is in an inoperable state.

Reference numeral 2 denotes a function key. Each time the function key 2 is pressed, the function of the lens key 25 provided on the interchangeable lens LE changes. Its function is stored as a lens switch mode LMO _2, each pressing a function key 2, a non-operating mode, ALM
(AE lock mode), RLPM (release priority mode), AMSM (aperture setting mode), and non-operation mode. Here, when the ALM (AE lock mode) is selected, pressing the lens key 25 once causes AE lock, and pressing the lens key 25 again releases AE lock. When RLPM (release priority mode) is selected, release priority is given while the lens key 25 is pressed. Furthermore, A
When VSM (aperture setting mode) is selected,
While pressing the lens key 25, the aperture value Av can be set. However, the lens key 25 functions as a switch for locking and canceling the photographing magnification in MLM (photographing magnification lock mode) described later, and in WIM (wide mode), the lens key 25 operates as a switch for wide zoom and releasing the photographing magnification. Act as

Reference numeral 3 denotes a mode key.
Each time is pressed, the exposure control mode changes to the program AE mode (P
Mode), aperture priority AE mode (A mode), shutter speed priority AE mode (S mode), manual mode (M mode), and program AE mode (P mode).

Reference numeral 4 denotes a system reset key. When the system reset key 4 is pressed, the lens switch mode LMO ₂ is set to the non-operation mode, the exposure control mode is set to the P mode, and the focusing lens is moved to the position ∞. The current position register NCR for storing the amount of movement of the focusing lens from the position ∞ is reset to zero.

Reference numeral 5 denotes a body display section, and the display contents include an exposure control mode, a lens mode LMO ₁ , a lens switch mode LMO ₂ , an exposure time, an aperture value, and the like. In the viewfinder (not shown), focus, focus cannot be detected,
Display of exposure time, aperture value, flash emission, etc. is performed.

[0015] 6 is a release button, shooting preparation switch S ₁ will be described later in pushing the first stage is turned on, the operation of the photometry, exposure calculation, AF is started. In addition, the release switch S ₂ described later is turned on by pressing the second stage, and
The exposure control operation starts.

Reference numeral 7 denotes an up / down lever. When the lever is slid leftward, an up switch UPS described later is turned on.
N, and an up operation is performed. Further, when the slider is slid rightward, a down switch DOS described later is turned on, and a down operation is performed. When the up operation is performed,
The shutter speed Tv is +1.0 in the S mode, the aperture value Av is +0.5 in the A mode, Tv is +1.0 if the Av selection key 8 is not pressed, and Av is +0 if the Av selection key 8 is pressed in the M mode. It becomes 5. When the down operation is performed, Tv is -1.0 in the S mode, Av is -0.5 in the A mode, and Tv is -1.0 in the M mode unless the Av selection key 8 is pressed. If so, Av will be -0.5.

Reference numeral 8 denotes an Av selection key, and as described above,
When the Av selection key 8 is pressed in the M mode and the up / down lever 7 is operated, the Av changes. The function of this Av selection key 8 is
When SM (aperture setting mode) is selected, the lens key 25 can be used instead.

Reference numeral 9 denotes a mount lock release button, and reference numeral 10 denotes a mount lock pin. Mount lock release button 9
When is pressed, the mount lock pin 10 is retracted, the mount lock is released, and the interchangeable lens LE can be removed. If the interchangeable lens LE is mounted and in the mount locked state, a lens lock switch LLS described later is turned off. Otherwise, the lens lock switch LLS is used.
Is ON.

Reference numeral 11 denotes a stop lever, and the number of interchangeable lenses LE is equal to the number of stop steps determined by the camera body BD.
This is a lever for narrowing down the aperture. Reference numeral 12 denotes an AF coupler, which is driven to rotate based on the rotation of an AF motor in the camera body BD. 13 is a hot shoe flash is mounted, the terminal J ₃₀ through J ₃₇ (not shown) is provided.

Reference numeral 14 denotes a lens mode setting member (for example, an IC
When the lever provided on the mounting portion 14 is lowered in the direction shown by the arrow, the lid of the mounting portion 14 is opened, and the lens mode setting member can be mounted. There are three types of lens mode setting members, and if nothing is attached, the lens mode is not set.

The first setting member is a member for setting AZP (auto-zoom program), and four types of modes can be selected with the AZP switching lever 24 on the lens side. The first mode AZP ₁ FIG 81, the second mode AZP ₂ Figure 8
In the second mode, the third mode has the relationship between the focal length f and the photographing distance D shown in FIG. Each of these modes A
In ZP ₁ ~AZP _3, based on the object distance D calculated in the camera body BD, Fig. 81 to FIG at the interchangeable lens LE 83
The focal length f is calculated by performing an operation based on the graph shown in FIG. 3, and the lens is moved to the focal length f. 4th
Is a MLM (imaging magnification lock mode). In this mode, when the photographer presses the lens key 25 once at a desired photographing magnification, the photographing magnification at this point is locked. Such a focal length f is calculated by calculation, and the lens is driven to the calculated focal length f. When the lens key 25 is pressed again, the MLM (photographing magnification lock mode) is released.

The second setting member is WIM (wide mode).
When the lens key 25 is pressed once while the member is attached, the lens shifts to the widest end, and the periphery of the subject can be checked. Furthermore, even when focus detection is not possible, the wide-angle end widens the field of view of the detection range, increases the contrast within the detection range, and facilitates detection. This is, for example, 3
This is effective for a telephoto zoom lens of 00 to 600 mm. When the lens key 25 is pressed again, the lens returns to the original focal length.

A third setting member is a member for setting EXZM (exposure zoom mode). When this member is mounted, the lens moves from the wide end toward the telephoto end while the actual exposure to the film is being performed, so that a special effect of zooming during exposure is performed. In addition,
In the embodiment, in the case of a vari-focal lens whose shooting distance changes due to zooming, the zoom operation during exposure is not performed even if the EXZM setting member is attached. The focus may be adjusted at the end, and the lens may be moved from the wide end to the tele end during the exposure. This makes it possible to record the subject in such a manner that the subject focused at the wide end becomes a nucleus and gradually becomes out of focus and becomes larger. Each setting member is generally configured using a card (IC card) containing a microcomputer, but a substrate on which a conductive pattern is printed may be used.

When the interchangeable lens LE is mounted on the camera body, the mount lock pin 10 engages with the mount lock groove 22, and the convex portion of the AF coupler 12 on the body engages with the concave portion of the AF coupler 21 on the lens side. The rotation of the AF motor on the body side is transmitted to the lens side via the AF couplers 12 and 21, and the focusing lens moves to adjust the shooting distance. Furthermore, the terminals J _{1 to} J ₈ on the lens side are connected to the terminals J _{11 to} J ₁₈ on the body side. Also, the aperture lever 11 engages with the aperture lever 20 on the lens side, the aperture lever 20 on the lens side moves by the movement of the aperture lever 11 on the body side, and the aperture opening moves the aperture levers 11 and 20. Controlled to the value corresponding to the minute.

Reference numeral 23 denotes a P / M selection lever. When zooming is performed by a motor in the lens based on a power supply from the body, a position for displaying a PZOOM (power zoom) (the letter "P" shown in the figure is exposed). Position). In the case of this PZOOM (power zoom), the focal length can be moved in the tele direction and the wide direction by using the zoom motor by operating the tele key 26 and the wide key 27 of the lens. Furthermore, AZP (auto zoom program), WIM (wide mode), E
Shooting in each lens mode of XZM (zoom mode between exposures) is also possible. When the P / M selection lever 23 is set at a position where a manual zoom is displayed (a position where "M" (not shown) is displayed), the power zoom operation is not performed and the zooming is performed manually by the zoom ring 29. When manual zoom is set, AZP,
When each of the WIM and EXZM lens modes is set, a warning is issued on the lens display unit 28.

Reference numeral 28 denotes a lens display unit, which displays a lens mode LMO ₁ , a lens switch mode LMO ₂ , a focal length f, a photographing distance D, and a locked magnification β _L in MLM (photographing magnification lock mode).

Reference numeral 25 denotes a lens key, the function of which is as described above. Reference numeral 24 denotes an AZP switching key, and four types of modes AZP ₁ and AZP are provided when an AZP (auto zoom program) setting member is mounted.
₂ , AZP ₃ and MLM.

FIGS. 4 to 9 are circuit diagrams of the entire camera system to which the present invention is applied. BD shown in FIGS. 4 to 6
C is a circuit in the camera body, LEC shown in FIG. 8 is a circuit in the interchangeable lens, and FLC shown in FIG. 9 is a circuit in the flash.

[0029] S ₁ is a shooting preparation switch is turned ON in the depression of the first stage of the release button 6. S ₂ is a release switch is turned ON in the depression of the second stage of the release button 6. S ₄ denotes a reset switch which is OFF ON, hoisting completed exposure completion.

ALS is an AE lock switch that is turned on while an AE lock key (not shown) is pressed. SY
S is a system reset switch that is turned on while the system reset key 4 is pressed. MOS is a mode switch that is turned on while the mode key 3 is pressed.

UPS is an up switch which is turned on when the up / down lever 7 is slid leftward.
DOS is a down switch which is turned on when the up / down lever 7 is slid rightward.

MAS is a manual Av switch that is turned on when the Av selection key 8 is pressed, and is used when setting the aperture value Av in the manual mode. FUS is a function switch that is turned on when the function key 2 is pressed.

LLS is an interchangeable lens LE is a camera body B
D is a lens lock switch that is turned off only when the mount is locked. PWS is a power switch that is turned on when the main switch 1 is at the ON position and turned off when the main switch 1 is at the OFF position.

PG₁, PG_TwoIs the power switch PWS or
Is the lens lock switch LLS from ON to OFF or
Each time the state changes from OFF to ON, the “Low” level pulse
This is a pulse generator that outputs a pulse. These outputs are AN
D gate AN_FourThe microcomputer CPUB in the body via
Conditional interrupt terminal NMI (Non Maskable In
(Terrupt) is input as an interrupt signal. power
Buffer BF only when switch PWS is ON_FiveNoh
Be motivated. Switch S₁, ALS, SYS, MOS,
UPS, DOS, FUS and buffer BF_TwoOutput is
Gate AN ₁And buffer BF_FiveVia the interrupt terminal
INT_A, The power switch PWS
When these switches are turned ON when
Fa BF _TwoWhen the output of the
The internal microcomputer CPUB is interrupted.

DOC is a mounting section 1 for a lens mode setting member.
4 is a setting member attached to the lens 4 and outputs a signal indicating each lens mode of AZP, WIN, or EXZM.

DD ₁ is an in-body booster circuit that performs a boosting operation when the in-body power supply control signal PWCB is at “Low” level. _VH is a high voltage (for example, 12 volts) serving as a power supply for the focus detection light receiving circuit FDC, and _VL is a low voltage (for example, 6 volts) mainly serving as a power supply for the analog circuit.

CVG ₁ is a constant voltage source in the body and outputs a constant voltage Vc (for example, 6 volts) for driving a digital circuit such as the microcomputer CPUB in the body.

EB is a power supply battery. The direct output Vo is a power source of a large load. When the power control signal PWCL ₁ in the lens is at “Low” level, the transistor BT ₁
Supplied as a power supply of the zoom motor MO ₃ in the interchangeable lens the output Vo of the power supply battery EB as the high voltage V _LEH for the lens through the terminal J _{11 1,} J 1. Transistor BT
_2, when the lens power supply control signal PWCL ₂ is "Low" level, the circuit of the interchangeable lens through the terminal J _12, J ₂ output Vc of the constant voltage source CVG ₁ as a low voltage V _LEL for lens To supply power.

[0039] wherein G ₁ is a ground line of low-power unit, between the lens and the body are connected through the terminal J _17, J _7. In the body, the analog section and the digital section need to be on separate ground lines, but are shown as a single line in the drawing. G ₂ is a ground line of the large power unit, between the lens and the body are connected through the terminal J _18, J _8, between the flash and the body are connected through the terminal J _37, J ₂₇ .

BCC is a battery check circuit,
Port P₂₇Battery output when is at "Low" level
The voltage of Vo is determined. V₀≧ V₁When is unconditional
Of the AF motor MO_TwoAnd zoom mode
TA MO_ThreeCan operate simultaneously. At this time, the port
P₁, P_Two, P_ThreeAre all at “High” level. V
₁> V₀≧ V_TwoIs judged as a conditionally normal state.
And the AF motor MO _TwoAnd zoom motor MO_ThreeSimultaneous operation
Is not allowed. At this time, port P₁Is "Low"
Bell, Port P_Two, P_ThreeBecomes the “High” level.
V_Two> V₀≧ V_ThreeIs judged as the first warning state.
And the AF motor MO_TwoAnd zoom motor MO_ThreeSimultaneous operation
Is not allowed. At this time, port P₁, P_TwoIs "Lo
w "level, port P_ThreeBecomes the “High” level.
V_Three> V₀Is set to the second warning state and operation is prohibited.
State. At this time, port P₁, P_Two, P_ThreeIs all
To a "Low" level.

REB is a reset terminal of the microcomputer CPUB in the body, and when the battery EB is mounted, receives a "Low" level pulse by a resistor and a capacitor as a reset signal and performs a reset operation of the microcomputer CPUB in the body.

FDC is a focus detection light receiving circuit, which includes a focus detection CCD, a CCD drive circuit, and a circuit which processes the output of the CCD, A / D converts the output, and supplies the A / D to the microcomputer CPUB in the body. cage, and is connected to the body in the microcomputer CPUB via the data bus DB _1. Also,
When the charge accumulation of the light-receiving portion (integration) is finished, to enter a "Low" level pulse to the interrupt terminal INT _B of the body in the microcomputer CPUB.

MO ₂ is an AF motor, DR ₁ is its driver, and normal rotation, reverse rotation and stop are controlled by ports P ₁₆ and P ₁₇ .

ENC is an encoder, and port P
_{When the signal 18} is at the “Low” level, the rotation of the AF motor MO ₂ is monitored, and the detected pulse is output to the counter input terminal CN.
Output to T, when the port P ₁₈ is "High" level to monitor the movement of narrowing the lever 11, and outputs the detected pulse to the counter input CNT.

MO ₁ is a motor for charging the film winding and exposure control mechanism. Also, Mg ₁ is a release magnet, and Mg ₂ is a magnet for stopping down (ApM
g), Mg ₃ is the magnet for starting the first curtain run (1CM
g), Magnet for starting the rear curtain of Mg ₄ (2CMg)
It is. These are all pulse driven by a combination magnet. DEDR is a charging motor MO
A decoder driver for driving based on a ₁ and a magnet Mg ₁ ~Mg ₄ to data from the data bus DB _2.

The FLCC is a direct light metering circuit for controlling the light emission amount of the flash, and its light receiving portion is arranged at a position for receiving the reflected light from the film surface. The direct light measuring circuit FLCC the integration start signal transmitted from the terminal J _21, J ₃₁ in synchronization with the flash emission start INST
At A, the integration of the light receiving unit is started. Microcomputer CPU in the body
B to the light metering interface LMIF, D / A
When the light receiving unit is integrated up to the analog value ANO corresponding to the dimming level which is converted and input to the direct light metering circuit FLCC, the direct light metering circuit FLCC flashes the light emission stop signal FSTP via the terminals J ₃₀ and J _20. Send to

LMC is a multi-segment photometric circuit provided in the finder optical path, and a photometric interface LMIF
And outputs the analog signal of each photometric unit to the photometric interface LMIF in response to the selection signal from

LMIF is a photometric interface,
A dimming level signal from the microcomputer CPUB in the body is input, D / A converted and output as an analog value ANO to a direct light measuring circuit FLCC for flash light emission control, a light measuring unit in the multi-segment light measuring circuit LMC is selected, It has the function of A / D converting the selected photometric output and transmitting it to the microcomputer CPUB in the body.

The ISD is an ISO provided on a film container.
A film sensitivity output unit that outputs sensitivity data.

The DSP ₁ is a display circuit in the body, which displays a lens display section 5 and a viewfinder display section (not shown) shown in FIG. 2 according to data from the microcomputer CPUB in the body.
And the function of sending data from the film sensitivity output unit ISD to the microcomputer CPUB in the body.

The exchanges data serially through the serial input SIN, a serial output SOUT, each signal line of the serial clock SCK to the metering interface LMIF and body in the display circuit DSP ₁ and the body in the microcomputer CPUB. When the body select signal CSB is at the “Low” level, the light metering interface LMIF is selected as a communication target with the microcomputer CPUB in the body.
When the display select signal CSD is "Low" level, the display circuit DSP ₁ is selected. Further, three serial communication signal lines SIN, SOUT, SC
K terminal J ₅ is a replacement _{lens, J 15; J 14, J} 4;
Through J _16, J _6, the flash J _24, J _34;
J _3, J _33; through J _25, J ₃₅ are connected. When a lens is designated as a communication target, the lens select signal CSL is set to a “Low” level.
This signal is transmitted to the lens via terminals J ₃ and J ₁₃ . Also, when specifying flash as a communication target,
The flash select signal CSF is set to the “Low” level, and this signal is transmitted to the flash via the terminals J ₃₆ and J ₂₆ .

The signal line LBL connected via the terminals J ₁₃ and J ₃ between the interchangeable lens and the body is a bidirectional signal line. Lens microcomputer CP port P ₂₂ is "High" level in the body in the microcomputer CPUB
When the UL port P ₃₆ is at the “High” level, the buffers BF ₁ and BF ₃ are activated, and a signal at which the lens select signal CSL becomes the “Low” level is transmitted from the microcomputer CPUB in the body to the microcomputer CPUL in the lens. ,
Interrupt signal to the interrupt terminal INT ₁ of the lens microcomputer CPUL is inputted, lens microcomputer CPUL replacement lens is designated as a communication target of the body while being activated. On the other hand, port P of microcomputer CPUB in the body
₂₂ is "Low" level, when the lens microcomputer CPUL port P ₃₆ is "Low" level, the buffer B
F ₂ and BF ₄ are activated, and the microcomputer CPU in the lens is activated.
When the port P _{35 of} L goes to “Low” level, this signal is input to the interrupt terminal INT _A of the microcomputer CPUB in the body via the signal line LBL, the AND gate AN ₁ , and the buffer BF ₅ , and the interchangeable lens Lens key 25,
The microcomputer CPUB in the body is activated by each operation of the tele key 26 and the wide key 27.

[0053] SX is a synchro switch ON the travel completion of the shutter front curtain (1C), it is transmitted as a light emission start signal to the flash via the terminal J _32, J _22.

Next, the in-lens circuit LEC (see FIG. 8) will be described. LMS is a lens mode switch that is turned on when the AZP switching lever 24 is slid.
LES is a lens switch that is turned on when the lens key 25 is pressed.

TeS is a teleswitch that is turned on when the telekey 26 is pressed. WiS is a wide switch that is turned on when the wide key 27 is pressed. These switches LMS, LES, TeS, when WiS is turned ON, the lens through the AND circuit AN ₂ microcomputer CPU
Interrupt signal to the interrupt terminal INT ₀ of L is inputted, lens microcomputer CPUL is activated.

FEN is a code plate for outputting data corresponding to the zoom position. DSP ₂ is an in-lens display circuit for performing display based on data from the in-lens microcomputer CPUL on the lens display unit 28.

MO ₃ is a zoom motor, and DR ₂ is its driver. Forward / reverse / stop is controlled by outputs from ports P ₃₇ and P ₃₈ . Whether the power of the driver DR ₂ is supplied is monitored by lens microcomputer CPUL through the resistor and the port P ₃₉ for voltage division.

AMFS is a switch in conjunction with a P / M selection lever for switching between power zoom and manual zoom. Power zoom is selected at the P position and manual zoom is selected at the M position.

REL is a reset terminal of the microcomputer CPUL in the lens. When a low voltage V _LEL for the lens is supplied from the body via the terminals J ₁₂ and J ₂ , a “Low” level pulse is generated by a resistor and a capacitor. Is received as a reset signal, and the microcomputer CPUL in the lens performs a reset operation.

The low voltage V _LEL for the lens is supplied while the interchangeable lens is mounted on the body. On the other hand, the high voltage V _LEH for the lens is supplied only when performing the power zoom.

Next, the circuit FLC in the flash (see FIG. 9) will be described. EF is a power supply battery for flash. DDF is a booster circuit in the flash, and operates when the port _P57 is at "Low" level. CVG _F is a constant voltage source in the flash, generates a constant voltage from the flash power supply battery EF, and supplies power to a low power consumption section in the flash circuit FLC.

MO ₅ is a motor for changing the flash irradiation range, and DR ₄ is its driver. Forward rotation, reverse rotation and stop are controlled by ports P ₅₃ and P ₅₈ . ZPC is the code plate for outputting the position data of the flash illumination range changing member driven by the motor MO _5. DS
P ₃ is a flash in the display circuit, a flash of light emission / non-emission, the relative range, charging is completed, the dimming OK, displays the irradiation range. MC is a main capacitor that stores energy for flash emission.

FL denotes a light emitting section, and a main capacitor M
When the charging voltage of C reaches a predetermined value (e.g., 300 volts), and a charge completion signal CHC is "High" level, this signal is transmitted to the port P ₅₀ of the flash microcomputer CPUF. When the ON signal of the synchro switch SX is transmitted through the terminals J ₃₂ and J ₂₂ , the light emission unit FL starts flash light emission, and the integration start signal INSTA is transmitted through the terminals J ₂₁ and J ₃₁ to the direct photometric circuit FL of the body.
It is transmitted to CC. Only when to perform flash light emission is from a port P ₅₂ of the flash microcomputer CPUF "L
OW "level flash enable signal FLEN
Is given to the light emitting unit FL. When a light emission stop signal FSTP is input from the direct light measurement circuit FLCC for flash light emission control in the body to the light emission unit FL via the terminals J ₃₀ and J ₂₀ , the light emission unit FL stops flash light emission and the flash display control signal The FDC is set to “High” level for a certain period of time, and the dimming OK is displayed by the display circuit DSP ₃ in the flash.

FMS is a flash main switch for switching flash emission / non-emission. This flash main switch FMS changes from ON to OFF or OFF
From pulse generator PG ₃ each time it switches from
Low "level is pulse output of the interrupt signal to the interrupt terminal INTα flash microcomputer CPUF is input. Also, from a port P ₂₃ of the body within the microcomputer CPUB through the terminal J _36, J _26" Low " When the level flash select signal CSF is input, the interrupt terminal INTβ
An interrupt signal is input to. The microcomputer C in the flash
Port P ₅₆ of PUF by flash select signal CSF, is to determine the body data input mode and flash data output mode.

The description of the hardware configuration of the camera system to which the present invention is applied has been completed, and the flowchart of the software configuration (FIGS. 10 to 7) will now be described.
This will be described with reference to 9).

First, when the power supply battery EB is mounted on the body, the reset terminal R of the microcomputer CPUB in the body is set.
A reset signal is input to the EB, and a reset routine shown in FIG. 10 is executed. In the reset routine, first, ports, registers, and flags are reset (#
1). Next, the power control signal PWCB in the body is set to “Lo”.
w "level to operate the body in the step-up circuit DD ₁ as,
The power supply of the high voltage _VH and the low voltage _VL in the body is started (# 2). Then, a subroutine of battery check (hereinafter referred to as "BC routine") is executed (SU
B1).

The BC routine is shown in FIG.
You. When this subroutine is called, first the port P
₂₇The battery check circuit B as "Low" level
Activate CC and wait until the circuit is stabilized (# 10
1, # 102). Next, port P ₁Is “High” level
Is determined (# 103). Port P₁Is "Hi
gh ”level, the battery voltage is V₀≧ V₁And
Set the terry check register BCR to BCR = 11
(# 104). Here, battery check register B
CR is a 2-bit register._TwoWhen
Zoom motor MO_ThreeBCR when simultaneous ON of
= 11, BCR = 10 when simultaneous ON is impossible, warning
BCR = 01 at the time of notification, BCR = 0 when operation is disabled
It is set to 0. Port P at # 103₁But"
If not “High” level, port P at # 105
_TwoIs "High" level. Port P_Two
Is "High" level, V₁> V₀≧ V_TwoAnd
BCR = 10 is set (# 106). Port P at # 103
_TwoIs not “High” level, the port is
P_ThreeIs "High" level. Port P
_ThreeIs "High" level, V_Two> V₀≧ V_ThreeIn
BCR = 01 and the first BC warning (for example,
(A mark indicating that the amount is small) blinks (# 10)
8, # 109). Steps # 104, # 106 and # 109
After processing, port P at # 110₂₇To “High”
Battery check circuit BCC disabled as level
And returns to the return address. Port P at # 107
_ThreeIs not "High" level, V_Three> V₀And
BCR = 00 and the second BC warning (the battery runs out
Flashes) indicating port P₂₇To "Hig
Battery check circuit BCC failed as h "level
And the power control signal PWCB in the body is set to “High”.
Boost circuit DD in body as level₁Stop the body
The microcomputer CPUB in the memory stops its operation (# 110 to #
113). Therefore, V_Three> V₀In case of battery replacement
Reset operation or interrupt signal to unconditional interrupt terminal NMI
Signal (power switch PWS or lens lock switch L
LS ON / OFF operation)
No.

Returning to the reset routine (FIG. 10),
It is determined whether the switch PWS is ON (# 3). Pa
If the power switch PWS is ON, the power flag PWF
1 and power unless the power switch PWS is ON
The flag PWF is set to 0 (# 4, # 5). Next, the lens
It is determined whether or not the lock switch LLS is ON (#
6). If the lens lock switch LLS is ON,
Lens is not attached, so the lens
The lag LLF is set to 0, and the lens non-mounting operation subroutine
(SUB2) is executed. Lens lock switch LLS
If is not ON, the lens is attached
Therefore, the lens mounting flag LLF is set to 1 in # 8,
Execute the lens mounting operation subroutine (SUB3)
You. Operation of subroutine SUB2 or SUB3 ends.
Then, the power control signal PWCB in the body is changed to “High” level.
The booster circuit DD1 in the body is stopped as a bell,
Child INT _AAnd the operation is terminated (# 9,
# 10).

Here, the subroutine (SUB2) of the lens non-mounting operation will be described with reference to FIG. When this subroutine is called, first, the AF lens attachment flag LLF
_{1 is set} to 0, the power control signals PWCL ₁ , PWC in the lens
High voltage V for lens L ₂ as "High" level
Stop power supply of _LEH and low voltage V _LEL (# 120- #
122). Next, it is determined whether or not the power flag PWF is 1 (# 123). If the power flag PWF is 1, a lens non-wearing display (the aperture value display section is set to “−−”) is performed, the set mode is displayed, and if the exposure time is set, the exposure is set. The time data is displayed and the routine returns (# 124, # 125). Power flag P
If WF is 0, all displays are deleted and the routine returns (# 126).

Next, a subroutine for lens mounting operation (S
UB3) will be described with reference to FIGS. In this lens mounting operation, communication between the body status ICPB and the lens status ICPL is performed, and a reset operation of the zoom lens and the focusing lens is performed. First,
Body status ICPB and lens status ICPL
Is 1-byte data used to notify each other of the state of the body and the lens, and is configured as follows.

(A) The body status ICPB is the highest
Place bit b₇To least significant bit b₀Up to 8 bits
Become. Hereinafter, the i-th video of the body status ICPB
Is referred to as ICPBi. Bit b₇, B₆Is
ICPB shows the distinction between new body and old body₇₆=
00 is the old body, ICPB₇₆= 01 if new
Means di. The old body is the new body (see Figs. 4 to 7)
Terminal J)₁₁, J₁₈Have
No. Bit b_Five, B_FourIndicates the sequence of the body
, ICPB₅₄If = 00, the body is inactive, ICPB
₅₄If = 01, the body is in operation, ICPB₅₄= 10
If the body is in exposure control operation, ICPB ₅₄If = 11
If the body is reset, the system has been reset. Bi
B_ThreeIndicates the state of the body power switch PWS
And ICPB_Three= 0, the power switch PWS is
ON, ICPB_Three= 1, the power switch PWS is O
It means FF. Bit b_TwoIs body data
Indicates the classification of output and lens data input, ICPB
_Two= 0, body data output, ICPB_Two= 1
Means lens data input. Bit b₁Is Power Zoo
Indicates whether or not ICPB₁If 0, powers
Not available, ICPB₁= 1 means power zoom possible
I do. Bit b₀Indicates whether the AF operation is being performed or not.
CPB₀= 0, AF is not activated, ICPB₀= 1
Means that the AF operation is being performed.

(B) The lens status ICPL is
Place bit b₇To least significant bit b₀Up to 8 bits
Become. Hereinafter, the i-th lens status ICPL
Is referred to as ICPLi. Bit b₇, B₆Is
It shows the distinction between the new lens and the old lens.₇₆=
10 is old lens, ICPL₇₆= 01 if new
Means The old lens is a new lens (see Fig. 8)
Not equipped with all functions, terminal J₁, J₈Do not have. Bit
B_Five, B_FourIs a teleswitch Te provided on the lens
S, wide switch WiS, lens switch LES status
Is shown. ICPL₅₄= 00 if each switch Te
S, WiS, LES are all OFF, ICPL₅₄= 01
Teleswitch TeS ON, ICPS₅₄= 10
If wide switch WiS is ON, ICPL₅₄If = 11
For example, it means that the lens switch LES is ON.
Bit b_Three, B_Two, B₁Indicates the type of lens
You. ICPL₃₂₁= 001 if fixed focus lens, IC
PL₃₂₁= 010 if not normal
Zoom with power lens, ICPL₃₂₁= 011
Manual with a normal non-varifocal zoom lens
Le Zoom, ICPL₃₂₁Varifocal if = 100
Power zoom with lens, ICPL₃₂₁= 101
Refocus lens means manual zoom
To taste. In the following explanation, fixed focus lens or manual
Use a zoom lens with a type I lens, varifocal
Type II lens, Varifo
The local lens is called a type III lens. Lentus
Least significant bit b of Status ICPL ₀Is zooming in or out
Is shown. ICPL₀= 0, stop zoom, I
CPL₀If = 1, it means that zooming is in progress.

The body status ICPB and the lens status ICPL are data used for the body and the lens to notify each other of the state, and are extremely important. Therefore, the body status ICPB is arranged at the 0th address AD0 of the data group sent from the body to the lens, and transmitted at the beginning of the communication. The lens status ICPL is the 0th of the data group sent from the lens to the body.
It is located at address AD0 and is transmitted at the beginning of communication.

The data group sent from the body to the lens is
It consists of a total of 4 bytes from the 0th address AD0 to the 3rd address AD3. The 0th address AD0 is the body status ICPB, the 1st address AD1 is the data pointer DPO, and the 2nd address AD2 is the mode buffer MO.
B, information on the photographing distance D is transmitted at the third address AD3. The data pointer DPO indicates the upper 4 bits b _{7 to} b ₄ when the body inputs data from the lens.
In specifying the starting address of the lens data, it is used to specify the type or the number of bytes of data from the start address at the lower 4 bits b ₃ ~b _0. Mode buffer M
OB is a lens mode LM in the lens in the display circuit DSP ₂
To view the O ₁ and lens switch mode LMO _2, lens mode LMO by the upper 4 bits b ₇ ~b _4
1 indicates the lens switch mode LMO ₂ with the lower 4 bits b _{3 to} b ₀ . The lens mode is LMO ₁
= 0000: inactive, LMO1 = 1000: A
ZP (auto zoom program), LMO ₁ = 0001
If WMO (wide mode), LMO ₁ = 0010 means EXZM (zoom during exposure). Lens switch mode is inactive if LMO ₂ = 0000, LM
If O ₂ = 0001, ALM (AE lock mode), L
If MO ₂ = 0010, it means RLPM (release priority mode), and if LMO ₂ = 0011, it means AVSM (aperture priority mode).

Next, the data group sent from the lens to the body is composed of a total of 9 bytes from the 0th address AD0 to the 8th address AD8, the lens status ICPL at the 0th address AD0, and the open aperture value at the 1st address AD1. Avo, the minimum aperture value Avm at the second address AD2
ax, the aperture value deviation value △ Avz,
At the fourth address AD4, a conversion coefficient Kl for converting the defocus amount DF into the coupler rotation speed N, the fifth address AD5
, A conversion coefficient NDC for converting the coupler rotation speed N into a photographing distance D, a focal length f at the sixth address AD6, a photographing magnification β at the seventh address AD7, and a lens offset amount _NL at the eighth address AD8 are transmitted. Is done.

[0076] Figure 17, the subroutine of the lens mounting operation shown in FIG. 18 (SUB3) is called, first, start the low voltage V _LEL of the feed for the lens of the lens in the power supply control signal PWCL ₂ as "Low" level Yes (# 14
0). As a result, the operating power supply voltage is supplied to the microcomputer CPUL in the lens, and C is connected to the reset terminal REL.
The reset operation of the microcomputer CPUL in the lens is performed by the R circuit. It waits for the elapse of a sufficient time to complete the reset operation (# 141). Then, 0111 * 010 is set in the body status ICPB (# 14)
2). This indicates a new body, system reset, power switch ON or OFF, body data output, power zoom possible, and AF non-operation. The b ₃ = * Body status ICPB, power flag PWF = 1 if b ₃ =
0, PWF = set 0, b ₃ = 1 and (# 143～
# 145). Then, at the same time that the body status ICPB is output to the lens, the lens status ICPL is read from the lens (# 146 to # 150). Specifically, the port P ₂₂ of the body within the microcomputer CPUB "Hi
gh ”level, the lens select signal CSL from the port P ₂₁ is supplied to the buffer BF ₁ and the bidirectional signal line LB.
L, terminals J ₁₃ and J ₃ , buffer BF ₃ , interrupt terminal INT _{1 of} microcomputer CPUL in the lens and port P ₄
, And then the lens select signal CSL
The "Low" level to generate an interrupt by the interrupt terminal INT ₁ to lens microcomputer CPUL as to wait for a lapse of a predetermined time period. Then, while outputting the body status ICPB to the lens in synchronization with the serial clock SCK,
The lens status ICPL is input from the lens. Thereafter, the lens select signal CSL is returned to the "High" level, and the communication is terminated. Since the above-described procedures of # 147 to # 150 are frequently used, hereinafter, they will be abbreviated as "bidirectional status communication", which means exchange of the body status ICPB and the lens status ICPL.

Bidirectional status communication (# 147 to # 15)
After completing step 0), it is determined whether or not the AF lens is a dedicated AF lens (# 151). Port P unless dedicated AF lens
_After returning ₂₂ to the "Low" level, the lens non-mounting operation (subroutine SUB2) is executed, and the routine returns.

If it is a dedicated AF lens at # 151, A
The F lens attachment flag LLF ₁ and 1, determines whether the new lens (# 155, # 156). Even if the old lens is a dedicated AF lens, it does not have the microcomputer CPUL in the lens and has only a function of outputting data of addresses AD0 to AD6. If it is determined in step # 156 that the lens is the old lens, the process proceeds to step # 170 and subsequent steps. If the lens is a new lens in # 156, it is determined in # 157 whether or not the lens is a type I lens. The type I lens is a fixed focus lens or a lens which is a manual zoom even if it is a zoom lens. If the lens is a type I lens, the process proceeds to step # 170 and subsequent steps as in the case of the old lens.
On the other hand, when it is determined not to be the type I of the lens is # 157, a power since a zoomable performs feeding of the high voltage V _LEH lens the lens power supply control signal PWCL ₁ as "Low" level for a predetermined time Wait (# 15
8, # 159).

This is because the power zoom is performed and
This is for automatically setting a short focal length to a long one.
Power switch PWS in addition to mounting or lens mounting
Is also performed when is turned off. High voltage V for lens_LEH
After starting the power supply to the system, two-way status communication (# 16
0 to # 163) to enter the lens status ICPL.
Least significant bit b₀Is determined to be 1 (# 16)
4). Least significant bit b ₀If is 1, zoom is in progress and #
Returning from 164 to # 160, the bidirectional status communication (#
160 to # 163). Repeat this, # 164
Is the least significant bit b of the lens status ICPL₀Becomes 0
Then, since the zoom is stopped, # 16
5, the power control signal PWCL in the lens₁To “High”
Return to bell and high voltage V_LEHPower supply to # 170
Move on to descending processing.

At step # 170, the AF motor MO ₂ is driven to the position ∞. Then, after elapse of a predetermined time, it is determined whether or not the lens has reached the end (# 171, # 1).
72). Specifically, if not detected pulse from the encoder ENC be driven AF motor MO _2, it determines that the lens has reached the end in that state. Until the lens reaches the end, the processes of # 171 and # 172 are repeated. When the lens reaches the end, the AF motor MO ₂ is stopped, and the current position register NCR is set to 0 (# 173, # 174). The current position register NCR is
A register for storing the amount of movement of the focusing lens from the position (the number of pulses from the encoder ENC).

When the content of the battery check register is BCR = 11, the AF motor MO ₂ and the zoom motor MO ₃ can be moved simultaneously, so that the above-described zooming (# 158 to # 165) and the focusing lens to the ∞ position can be performed. The movement (# 170 to # 174) may be performed simultaneously. In addition, when the power lens EB is mounted, when the interchangeable lens LE is mounted, when the power switch PWS is turned on and off, and when the system reset key 4 is pressed, the focus lens is moved to the position ∞. Is also performed.

When the zooming and the movement of the focusing lens to the ∞ position are completed, the flow shifts to # 175 shown in FIG. 19, where it is determined whether or not the lens is a new lens. With a new lens,
01000110 or 01 for body status ICPB
001100 is set (# 176 to # 179). This is when the body is inactive, the power switch is ON or OFF,
Indicates that lens data is input, power zoom is enabled or disabled, and AF is not activated. Then, set the lens mode LMO ₁ and the lens switch mode LMO ₂ to mode buffer MOB, the input data from the lens in order to specify the first to address AD1 6 bytes, sets the data pointer and DPO = 16 _H ( # 180, # 181). Then, the body status ICPB and the lens status ICPL are exchanged by bidirectional status communication (# 182 to # 184), and the data pointer DPO is output (# 185, # 18).
6) Output the mode buffer MOB to the lens and input the open aperture value Avo from the lens (# 187, # 1)
88), followed by a minimum aperture Avmax, aperture deviation DerutaAv, transform coefficient K _L and NDC, and inputs the focal length fv from the lens (# 189～ # 193). Here, the data of the focal length f from the lens is the value fv of the apex system.
Is entered. After the above data communication is completed, the lens select signal CSL is returned to the “High” level, and the lens switch mode LMO ₂ is displayed (# 194, # 19).
5).

Next, it is determined whether or not the lens is a type I lens (fixed focus lens or manual zoom lens) (# 1).
96). If Type I of the lens, and erases the display of the lens mode LMO ₁ at # 197, the process proceeds to # 205. If it is not a type I lens but a lens capable of power zoom, it is determined whether or not it is EXZM (zoom during exposure) (# 198). If not EXZM (zoom between exposures)
Display lens mode LMO ₁ at # 200, the process proceeds to # 205. If it is EXZM (zoom during exposure), it is determined whether or not the lens is a type III lens (varifocal lens) (# 199). # 1 for Type III lens
At 97, the display of the lens mode LMO ₁ is deleted, and # 205
Move to # 20 if not a type III lens
0 indicates the lens mode LMO ₁ (EXZM) and # 2
Move to 05. The display of the lens mode LMO ₁ and the lens switch mode LMO ₂ (# 200, # 195)
In, when each mode is set to the inoperative state, the respective displays are not performed. Also, if the varifocal lens is to perform the operation of EXZM (zoom during exposure), steps # 198 and # 199 are unnecessary.

When it is determined in step # 175 that the lens is an old lens, even if the body data is output, the data cannot be read on the lens side.
x, the aperture value deviation amount ΔAv, the conversion coefficient K _L and the NDC, and the focal length fv of the apex system (# 201 to # 2)
03). The display of the lens mode LMO ₁ and the lens switch mode LMO ₂ is erased (# 204). The contents of the register storing the set aperture value in both the new and old lenses are represented by (Avo + ｖAv) and (Avma
x + △ Av) (# 20)
5). Next, it is determined whether or not the power flag PWF is 1 (# 206). If PWF = 1, set value is displayed, and PW
If F = 0, all displays are deleted (# 207, # 20)
8). Then, the port P ₂₂ In any case, "Lo
w "is returned to level, the process returns (# 209). Here, the port P _22" return to the Low "level, interrupts CPUB the microcomputer body via a bidirectional signal line LBL from lens microcomputer CPUL and in order to allow input an interrupt signal to the terminal INT _a, when there is no need to act on the lens from the body, essentially port P
By returning ₂₂ to the “Low” level and waiting, it is waited for activation from the lens.

Next, when the power switch PWS is turned ON to O
When changing to FF or from OFF to ON, or
Lock switch LLS from ON to OFF or OF
The operation at the time of changing from F to ON will be described.
Whether the power switch PWS is from ON to OFF or OFF
Changes from ON to ON, the pulse generator PG₁"L" from
An “ow” level pulse is output from the lens lock switch LLS.
Changes from ON to OFF or from OFF to ON,
Pulse generator PG_Two"Low" level pulse from
Are respectively AND gates AN_FourThrough the unconditional interrupt end
Input to child NMI and interrupt after # 15 shown in FIG.
Perform processing. The processing of # 15 to # 26 is a power switch
When PWS is turned ON / OFF or lens is detached
To terminate the previous operation as soon as possible
Operation. First, the high voltage V for the lens_LEHPower supply
Stop (PWCL1 = “High”), zoom motor
MO _ThreeIs stopped (# 15). Also, the AF motor MO
_TwoIs output (# 16). Next, whether or not
Is determined (# 17). During exposure, each magnet
Mg_Two~ Mg_FourTo complete the exposure control operation.
(# 18 to # 22). Then, the exposure control operation ends.
And reset switch S_FourIs turned on, the film winding
Lifting motor MO₁To turn on the film
(# 23, # 24). When film winding is completed
Reset switch S_FourIs turned off, the film winding
Lift motor MO₁Is stopped (# 25, # 26). So
Then, the process proceeds to # 27.

If the exposure is not being performed in # 17, it is determined whether or not the film is being wound (# 41). If the film is being wound, the process proceeds to step # 25. After the film winding is completed, the process proceeds to step # 27. If the exposure is not being performed or the film is not being wound in # 17 and # 41, the process immediately proceeds to # 27.

[0087] Thus, if the state of exposure and film winding has been completed, reset the port, causing the operation body in the boosting circuit _{DD 1 (PWCB = "Low"} ) (# 27, # 28). Next, the BC routine (SUB1)
And shifts to # 29.

At step # 29, it is determined whether or not the lens lock switch LLS is ON. If the lens lock switch LLS is ON, the lens is not mounted. If the lens lock switch LLS is ON in # 29, whether the lens lock switch LLS has changed from OFF to ON in # 30,
It is determined based on the lens attachment flag LLF whether it remains ON, and in the latter case, the process proceeds to # 31. If the lens lock switch LLS is OFF in # 29, it is determined in # 37 whether the lens lock switch LLS has changed from ON to OFF or remains OFF by using the lens mounting flag LLF. In the latter case, # Move to 31. # 29
, The lens lock switch LLS is ON, and if LLF is not 0 in # 30, it means that the lens lock switch LLS has changed from OFF to ON. ) And the process proceeds to # 39. If the lens lock switch LLS is OFF at # 29 and if LLF is not 1 at # 37, it means that the lens lock switch LLS has changed from ON to OFF. At # 38, LLF = 1 and the lens mounting operation ( SUB3) is executed, and the flow shifts to # 39.

If the lens lock switch LLS remains ON or OFF in steps # 29, # 30, and # 37, the process proceeds to step # 31. In # 31, the power switch PW
It is determined whether S is ON. Power switch P at # 31
If WS is ON, whether the power switch PWS has changed from OFF to ON or remains ON is determined by the power flag PWF in # 32. In the latter case, #
Move to 39. Power switch PWS is turned off at # 31
If F, the power flag PWF is used to determine whether the power switch PWS has changed from ON to OFF or remains OFF in # 34. In the latter case, the process proceeds to # 39. At # 31, the power switch PWS is ON,
If PWF is not 1 in # 32, the power switch PWS
Has changed from OFF to ON, and # 33
To set PWF = 1, execute the power-on routine (SUB4), and shift to # 39. If the power switch PWS is OFF at # 31 and PWF is not 0 at # 34, it means that the power switch PWS has changed from ON to OFF, and PWF = 0 at # 35 and the power-off routine (SUB5) And the process proceeds to # 39. The operation of # 39 body in the boosting circuit DD ₁ in stopped (PWCB = "High"), the process ends to allow interruption by # 40 at the interrupt terminal INT _A.

The contents of the power-on routine (SUB4) are shown in FIGS. First, whether a dedicated AF lens in # 210 is mounted to determine the AF lens attachment flag LLF _1. LLF _{1 in} # 210
If not = 1, it is determined that the dedicated AF lens is not mounted, the subroutine (SUB2) of the lens non-mounting operation is executed, and the process returns. If LLF ₁ = 1 in # 210, it is determined that the dedicated AF lens is attached and port P
_{22 is set} to the “High” level, and thereafter, the processing after step # 170 (サ ブ ル ー チ ン position reset of the focus lens) in the above-described lens mounting operation subroutine (SUB3) is performed, and the process returns.

Power switch off routine (SUB5)
The contents of the subroutine (SU
The same processing as the subroutine (SUB3) is performed except that the processing of # 140 and # 141 in B3) is omitted.

The above points can be summarized when the battery is installed or
Low voltage V to lens when lens is attached _LELSupply the ren
The microcomputer CPUL in the memory is activated, and the low voltage V_LELCompanion
When supplying power or turning off the power switch PWS,
Set to a compact zoom position and then or
When the switch PWS is ON, the focus lens is
Reset. Also, by removing the lens, the lens
For low voltage V_LELSupply stops.

Next, the interrupt operation when various switch operations are performed will be described. When various switches are operated to input a “Low” level interrupt signal to the interrupt terminal INT _A , the processes after # 50 shown in FIG. 13 are performed. First, the operation body in the boosting circuit DD ₁ (PWCB
= “Low”), and the power supply of the lens high voltage V _LEH is stopped (PWCL ₁ = “High”) (# 50, # 5)
1). This is because an interrupt may occur during zooming. Then, after executing the BC routine (SUB1), it determines whether or not a dedicated AF lens is mounted by the AF lens attachment flag LLF ₁ (# 52). L
If LF ₁ = 1, the dedicated AF lens is attached, and the bidirectional signal line LBL connected to this lens is attached.
Is "Low" level (# 5).
3). If the bidirectional signal line LBL is at "Low" level, the microcomputer CPU in the body is operated by an interrupt signal from the lens.
Since B has been activated, the process proceeds to # 60 after executing the lens routine (SUB6). # 53
Signal line LBL connected to the lens with "Hig"
If hLF level or LLF ₁で_{1 in} # 52, since it is not activation by an interrupt signal from the lens, various switches in the body are scanned (# 54 to # 58).

[0094] First, it is determined whether the switch S ₁ is an ON (# 54). Since the switch S ₁ is located in the activation by ON if the operation of the release button 6, the process proceeds to # 60 after performing the S ₁ routine (SUB7). # 54
In unless the switch S ₁ is ON, the following, # 55, # 5
6, switches # 57, # 58, switches ALS, SYS, MO
It is determined whether or not S and FUS are ON. If any switch is ON, an AE lock routine (SUB8), a system reset routine (SUB9), a mode change routine (SUB10), a function corresponding to the switch are performed. Each subroutine of the routine (SUB11) is executed, and the flow shifts to # 60. Also, # 54 to # 58
If none of the switches is turned on, it is determined that the up switch UPS or the DOWN switch DOS has been turned on, and the Av / Tv up / down subroutine (SUB12) is executed, and the process proceeds to # 60.

In # 60, the body status ICPB is
Non-operation, power switch ON, body data output, power zoom possible, AF non-operation data 01001010
Set. Setting the lens mode LMO ₁ and the lens switch mode LMO ₂ to # 61 in the mode buffer MOB. # 62 in the port P ₂₂ as "High" level, the signal transmission line of a bidirectional signal line LBL from the body to the lens. In # 63, the lens select signal is set to the “Low” level and the microcomputer CPUB in the body is set.
Select a lens as a communication target with. And # 64
Wait for a certain time at # 65 and body status ICPB at # 65
Is output to the lens, and after waiting for a certain time in # 66, #
At 67, the contents of the mode buffer MOB are output to the lens. In # 68, the lens select signal CSL is set to “High”.
h "to the return level, the port P ₂₂ in # 69" Low "
As the level, the bidirectional signal line LBL is a signal transmission line from the lens to the body. As a result, a state in which activation from the lens is received is achieved. # 70 stops the boosting by the body in the boosting circuit DD ₁ in (PWCB = "Hi
gh "), the process ends the interrupt by the interrupt signal INT _A as Y in # 71.

[0096] Next, FIG 21 S ₁ routine (SUB7) that is called when the switch S ₁ is been turned ON, FIG. 22
And will be described. In this subroutine, first, the photometry enable signal LMEN is set to the “Low” level, and the photometry interface LMIF is activated (# 251).
As a result, the photometric interface LMIF sequentially A / D converts each photometric value at a constant period based on the reference clock φ from the microcomputer CPUB in the body, and each photometric section is completed each time the A / D conversion of one photometric value is completed. Is repeated while the photometry enable signal LMEN is at the "Low" level. Then whether a dedicated AF lens is mounted to determine the AF lens attachment flag LLF ₁ (# 252). LLF ₁ =
If 1 (AF lens attached), the flag AFF indicating that the AF operation has been performed is set to 1, and the offset routine (S
If LLF ₁ = 0 (no AF lens attached) in UB13), the flow shifts to # 297.

In the offset routine (SUB13) and subsequent steps, a process for performing focus detection is performed. First, the offset routine (SUB13) performs an offset process for moving the focus lens to a position where focus detection is possible in the case of a varifocal lens. In the offset processing, in a vari-focal lens that is out of focus due to zooming, even if the focus lens goes out of focus due to zooming, the focus lens is moved so that it is focused within the range of the closest position from the ∞ position. This is to ensure detection. The lens movement amount at this time is called an offset amount N _L, and the calculation method thereof will be described later with reference to FIGS. 84 and 85.

The offset routine (SUB13) will be described with reference to FIGS. In this subroutine, first, it is determined whether or not the mounted lens is a type III lens (varifocal lens) (# 30)
1). If it is not a varifocal lens, it returns immediately. On the other hand, if the burr follower lens, photographing preparation switch S ₁ is determined whether the ON (# 302). When the shooting preparation switch S ₁ is ON, the body in calculation operation, the power switch is ON, the lens data input, zooming Allowed, data 01010100 indicating the AF inoperative, photographing preparation when the switch S ₁ is OFF, When the body is inactive, data 01000100 indicating the same state is set in the body status ICPB (# 303, # 3)
04). Data pointer is set to _{DPO = 81 H (# 305)} . This is from the eighth address (AD8) to 1
This means that byte data (that is, in-lens offset amount N _L ) is input from the lens. # 306
In steps # 311, these two data are sent to the lens. That is, the port P ₂₂ as "High" level at # 306, the bidirectional signal line LBL and the signal transmission line to the lens from the body, the lens select signal CS at # 307
L is set to “Low” level and the microcomputer CPU in the body
A lens is selected as a communication target with B. And # 3
08 to wait for a certain period of time and # 309 body status I
Transmit / receive the CPB and the lens status ICPL,
Then, the contents of the data pointer DPO are output to the lens in # 311. And waiting in the lens-side time required to compute the offset amount N _L, to enter the offset amount _{N L (# 312, # 313} ). # 314 in the lens select signal CSL back to "High" level, as "Low" level port P ₂₂ in # 315, the signal transmission line of a bidirectional signal line LBL from the lens to the body. As a result, a state in which activation from the lens can be accepted is achieved. In step # 316, it is determined whether or not the offset amount is N _L = 0. If N _L = 0, it is not necessary to move the lens by the offset amount. On the other hand, if N _L ≠ 0, it is necessary to move the lens by an offset amount, so that N _L × K _B = N (K _B is the rotation amount N _L of the AF couplers 12 and 21 and the rotation amount N of the AF motor MO _2.
To calculate the offset amount N
AF motor MO for moving _L focus lens
The rotation amount N of ₂ is calculated, and the rotation amount N is subtracted or added to the current position register NCR of the focusing lens according to the driving direction (# 317, # 318). Here, the rotation amount N is positive or negative. Then, the rotation amount N is preset to a counter for counter interruption, and the AF motor MO ₂ is rotated by the rotation amount N.
And the counter is decremented by a pulse from the encoder ENC.
Wait to become. And when the content of the counter becomes 0,
To return to stop the AF motor MO ₂ (# 319~
# 321).

[0099] Returning to the flow of FIG. 21, when the processing of the offset routine (SUB13) of S ₁ the routine is completed, the CCD initialization operation for sweeping out CCD extra charge (# 253). Then, the zoom enable flag ZEN is set to prevent the power zoom from being performed.
F is set to 0, the photometry calculation incomplete flag LMF is set to 1 to indicate that no photometry calculation has been completed, and charge accumulation (integration) of the CCD is started.
An interrupt by the interrupt signal input to the NT _B and allowed, AE
The routine proceeds to a routine (# 254 to # 257).

In the AE routine, first, a lens communication routine (SUB14) is executed. This is an operation of reading data necessary for AE and AF from the lens. Then, it is determined whether or not the attached lens is a new lens (# 258). AF completion flag AF for a new lens
It is determined whether or not CF is 1 (# 259). This is AF
Is completed, and AFCF =
If AF is completed in step 1, power zoom is possible,
The zoom routine (SUB15) is executed. On the other hand, AF
If AF is not completed at CF # 1, if zooming is performed during focus detection, the subject light incident on the focus detection light receiving unit changes (the subject corresponding to the focus detection area changes), and accurate detection is performed. Since the focus cannot be detected, the zoom routine (SUB15) is skipped. Furthermore, in the case of a varifocal lens, the zooming changes the shooting distance, so that it is not desirable to perform zooming while the focusing lens is moving. For this reason AF
Is not completed, the zoom routine (SUB15) for power zoom is skipped. If AF has not been completed or the zoom routine (SUB15) has been completed, a lens switch routine (SUB16) is executed to perform processing for lens switch operation, and the routine proceeds to step # 297.

If it is determined in step # 258 that the lens is an old lens, since the old lens has neither the power zoom mechanism nor the lens switch, # 259, SUB15, SUB16
Is skipped, and the flow shifts to # 297. Also, # 252
Even when the dedicated AF lens is not attached, the zoom routine (SUB15) and the lens switch routine (SUB16) are skipped, and the process proceeds to # 297.

In step # 297, ISO data indicating the film sensitivity is input. Next, data from the flash is input (# 260). At the time of inputting the flash data, the flash select signal CSF is set to “Low” level, and is set to “High” level after a predetermined time. Then, a serial clock SCK is output, and this clock S
Reads serial data sent from the flash in synchronization with CK. As a result, data of the dedicated flash, charging completion, light control OK, and light emission amount are input from the flash to the body. Next, the photometric interface LMI
Subroutine for inputting photometric data from F (SU
B17) is executed, and a subroutine for exposure calculation (SUB18) is executed based on the input photometric data. next,
Operation result display is made by sending to the display circuit DSP _1, and outputs the data to the flash (# 261, # 262).
When outputting data to the flash, the flash select signal CSF is set to the "Low" level, and while the data is output, the signal CSF is kept at the "Low" level to distinguish it from the case of data input. The output data from the body to the flash is an aperture value Av, a film sensitivity Sv, a shooting distance Dv, and a focal length f. And
Since the photometry calculation has been performed, the photometry calculation incomplete flag LMF is set to 0 (# 263). In # 264, the flag FDF is 1
Is determined. This flag FDF sets the flag FDF to 1 after inputting data from the CCD when there is an interrupt due to the completion of CCD integration at the point in time when the photometric operation has not been completed, and the AE routine interrupts. There is a case where the operation returns to the given address and the operation of the remaining AE routine is performed (see # 581 to # 583 in FIG. 39 to be described later). FDF at # 264
If = 1, FDF is set to 0 in # 265, and the process proceeds to the AF routine. On the other hand, if FDF = 0 in # 264, #
Move to 266.

In steps # 266 to # 273, it is determined whether or not the operation can shift to the exposure control operation. First, in # 266, it is determined whether or not the AF lens is a dedicated AF lens by using an AF lens mounting flag LLF _1.
Determined by If LLF ₁ ≠ 1 and the lens is not a dedicated AF lens, the process unconditionally proceeds to # 273. If it is a dedicated AF lens, it is determined in step # 267 whether or not the release enable flag RLEF is 1. If RLEF = 1 in # 267, the release priority is given, so the flow shifts to # 273. R at # 267
If LEF ≠ 1, AF priority is given, and in # 268, it is determined whether or not the AF completion flag AFCF is 1. AF at # 268
If completed, proceed to # 273. If AF is not completed, execute # 27.
Move to 4. In # 273, the release switch S ₂ is set to O
N is determined. Release switch S ₂ at # 273
Is ON, the flow shifts to the exposure control operation (SUB19). On the other hand, the release switch S ₂ is if OFF, # 2
The process moves to 74.

In step # 274, the shooting preparation switch S₁Is O
N is determined. Shooting preparation switch S₁Is ON
For example, the predetermined value K is stored in the timer register TIR in # 275.
Set and reset the timer at # 276 and start
Let Then, in # 298, it is determined whether or not the AF lens is a dedicated AF lens.
F lens attachment flag LLF₁Determined by LLF ₁
If = 1 (dedicated AF lens), AF operation at # 299
Whether the AF operation has been performed is determined by the AF operation flag AFF.
Determine. If AFF ≠ 1, shift to # 252 and execute AFF
If = 1, the process proceeds to the AE routine. Also, in # 298
If it is not a dedicated AF lens, the flow shifts to # 297.

[0105] taken at # 274 preparation switch S ₁ is OFF
Then, the AF motor MO ₂ is stopped and each flag AF
CF, FALF, AFF, RLEF, LCF, FDF,
Reset the LCF ₁ to 0, to erase the display for AF, focus and disable the interrupt (interrupt during the CCD integration end) by the interruption terminal INT _B, a power zoom variable (ZENF = 1) ( # 278- # 282). Next, it is determined whether or not the AE lock switch ALS is ON (# 283). If the AE lock switch ALS is OFF, also AE lock switch ALS shooting preparation switch S ₁ also are both OFF,
Since the AE routine is being repeated for a certain period of time (for example, 5 seconds) after both switches S ₁ and ALS are turned off, the interruption by the interruption terminal INT _A is enabled at # 285.
In # 286, the interruption by the timer is permitted, and the flow shifts to # 298. AE lock switch ALS is ON at # 283
If so, the process proceeds to step # 275.

[0106] release switch S ₂ at # 273 if ON, the execution of the exposure control routine (SUB19). If the exposure control operation is terminated and the reset switch S ₄ ON, film winding performs (# 290, # 29
1). After film winding is completed, reset switch S
_{If 4} turns OFF, stop film winding (#
292, # 294). And, to return the display, wait for the shooting preparation switch S ₁ is OFF (# 294, #
295). Shooting preparation switch S ₁ is becomes to OFF, the display state of only a set value, the flow returns to the main routine (# 2
96).

[0107] Next, a description will be given of each subroutine in the S ₁ routine. First, the lens communication routine (SUB
14) will be described with reference to FIGS. 25 and 26. When this subroutine is called, first, the port P ₂₂ "High"
Level, and the bidirectional signal line LBL is used as a signal transmission line from the body to the lens (# 331). Then, it is determined whether the attached lens is a new lens (# 332). If it is a new lens, ICPB setting subroutine (SUB2
0) is executed, and if not a new lens, the flow shifts to # 345.

Here, a subroutine for setting ICPB (S
UB20) is shown in FIG. In this subroutine, first, it determines whether the photographing preparation switch S ₁ or AE lock switch ALS is ON (# 361, #
362). If any one of the switches S ₁ or ALS is ON, the body is in an arithmetic operation and the data 010101 * 0 indicating lens data input is transmitted to any of the switches S ₁ and A.
If LS is also OFF, the body is not operated, and data 010001 * 0 indicating lens data input is set in the body status ICPB (# 363, # 364). And
The first bit b ₁ = * of the body status ICPB is set to b ₁ = 1 to indicate that power zoom is possible if the zoom enable flag is ZENF = 1, and is set to b ₁ = 0 to indicate that power zoom is not possible if ZENF = 0. (# 365- #
367).

[0109] Returning to the flow of FIG. 25, step # 333, sets the data pointer and DPO = 16 _H. This means that 6-byte data from the first address AD1 has been specified as the read data from the lens. # 334
Then, the mode buffer MOB is set. The body status ICPB, the data pointer DPO, and the contents of the mode buffer MOB are sent to the lens, and the lens status IC is exchanged for the body status ICPB.
PL is received from the lens, and data of the open aperture value Avo is received from the lens in exchange for the mode buffer MOB (# 335 to # 341). Then, the minimum aperture value Avma
x, aperture value deviation △ Av, conversion coefficient K _L and NDC, and focal length f are input from the lens, and the lens select signal CSL is returned to the “High” level (# 351,
# 352).

On the other hand, if it is not a new lens in # 332, #
In steps 345 to # 348, the lens status ICPL and the open aperture value Avo are input, and in step # 351, the remaining lens data (Avmax to fmax) are similarly input. This is because the body status ICPB, data pointer DPO, and mode buffer MOB cannot be received unless the lens is a new lens.

[0111] Upon completion of the above data communication, photographing preparation switch S ₁ and the AE lock switch ALS are both OFF
Is determined (# 353, # 354). If the switches S ₁ and ALS are both OFF, the port P
_{22 is set} to the “Low” level, and the bidirectional signal line LBL is set.
Is a signal transmission line from the lens to the body, and the process returns (# 355). If any of the shooting preparation switch S ₁ and the AE lock switch ALS is ON, to return to skip the # 355. In this case, the bidirectional signal line LBL is a signal transmission line from the body to the lens.

Next, the zoom routine (SUB15) will be described with reference to FIGS. In this subroutine,
First, the tele switch TeS or the wide switch WiS O
It is determined whether an N signal is input (# 37)
1). If the ON signal is input in # 371, # 372
Then, it is determined for the first time by the flag TWF whether or not the ON signal has been input. This flag TWF is set to TW when the tele switch TeS or the wide switch WiS is ON.
F = 1, and TWF = 0 when both the tele switch TeS and the wide switch WiS are OFF. # 37
If TWF ≠ 1 in 2, it means that the state has been changed from OFF to ON. In this case, whether the power zoom is possible is determined by the zoom enable flag ZENF in # 373. If power zoom is possible, set TWF = 1, supply the high voltage V _LEH for the lens (PWCL ₁ = “Low”), erase the in-focus display, and set the flags AFCF and FALF to 0.
And returns (# 374 to # 377). # 372
If TWF = 1, switch T for zoom has been
It means that eS or WiS was turned on, and #
373 to # 377 are skipped and the process returns. # 37
If 3 and the zoom enable flag ZENF is not 1,
Zoom switch TeS or WiS is turned on from OFF
Power zoom is not possible even if
It skips 74 to # 377 and returns.

In step # 371, the tele switch TeS and the wide switch are set.
If both switches WiS are OFF, change from ON to OFF
It is determined by the flag TWF whether or not the value has changed (# 38).
0). If TWF is not 1, it remains OFF
Therefore, return as it is, and if TWF = 1,
Since it is changed from ON to OFF, TW
F = 0, high voltage V for lens_LEHPower supply to power supply (PW
CL₁= “High”) (# 381, # 38
2). Next, the offset routine (SUB13) is executed.
Of the focus lens due to zooming (off
Set amount N_L) Is corrected. And the shooting preparation switch
S₁Is determined to be ON (# 383). Preparation for shooting
Switch S₁If is OFF, return and shoot
Preparation switch S ₁Is ON, CCD charge accumulation (product
Minutes) and interrupt terminal INT_BInterrupt (product of CCD
(Interrupt at the end of minute)
Offset amount N_LFocus is achieved by moving
AF operation to confirm whether the
And return as ZENF = 0 (# 3
84- # 386).

Next, the lens switch routine (SUB1)
6) will be described with reference to FIGS. In this subroutine, first, it is determined whether or not the lens switch is ON (# 391). If the lens switch is ON, WIM
It is determined whether or not (wide mode) (# 392). WI
If it is M (wide mode), it is determined whether or not the lens is a type I lens (fixed focus lens or manual zoom lens) (# 393). If it is a type I lens,
Return as it is. If it is not a type I lens,
Shooting preparation switch S ₁ is determined whether the ON (# 39
4). If shooting preparation switch S ₁ is ON, Rokonfuragu LCF determines whether 1 (# 395). If the low contrast flag LCF is not 1, it is determined that focus detection is possible, and the process returns. And, whether the shooting preparation switch S ₁ is OFF in # 394, or # 395
When the low contrast flag is LCF = 1 and the focus cannot be detected, it is determined whether or not the lens switch flag LSF is 1 (# 396). Lens switch flag LSF
Is not 1, it means that the lens switch has changed from OFF to ON, so the lens switch flag LSF is set to 1, the AF motor MO ₂ is stopped, and the lens (PWCL ₁ = “Low”) for high voltage V _LEH (#
397- # 399). Then, it prohibits an interrupt to the interrupt terminal INT _B (interruption by CCD of integration end), the flag A
Return FCF and FALF as 0 (# 400,
# 407).

If the lens switch flag LSF is 1 in step # 396, it means that the lens switch has been turned ON before and that the WIM (wide mode) operation has already been performed. It is determined whether or not zooming to the wide end has been stopped (# 401). If zooming has not stopped, the routine returns. If the zooming is stopped, the supply of the lens high voltage V _LEH is stopped (PWCL ₁ = “Hi”).
gh ”) to stop the zoom motor MO ₃ (# 402). Then, an offset routine (SUB16) is executed to correct the focus shift amount (offset amount) of the focusing lens due to zooming, and the shooting preparation switch is set. S ₁ is determined whether the ON (#
403). Shooting preparation If the switch S ₁ is OFF, as it is to return, the shooting preparation switch S ₁ is ON if C
Start charge accumulation of CD (integrated), an interrupt to the interrupt terminal INT _B (interruption by CCD of integration end) as variable focus lens is in focus, by performing the movement of the offset amount N _L An AF operation for confirming whether or not the correction has been made to a suitable state is performed, and the process returns with ZENF = 0 (# 404 to # 406).

If it is not WIM (wide mode) in # 392, it is determined whether or not the lens switch flag LSF is 1 (# 409). If LSF is not 1 in # 409, it means that the lens switch has changed from OFF to ON. LSF is set to 1 in # 410, and A is set in # 411.
It is determined whether or not LM (AE lock mode) is set. ALM
If (AE lock mode), LALM = 1 in # 412
And return. This flag LALM is a flag indicating that the AE lock has been performed by an operation on the lens side. # 4
If it is not ALM (AE lock mode) in # 11, # 41
At 3, it is determined whether or not RLPM (release priority mode) is set. If it is RLPM (release priority mode) in # 413, the process returns as RLEF = 1 in # 414. This flag RLEF is a flag indicating that the camera is in the release priority mode. If it is not RLPM (release priority mode) in # 413, the process returns. Also,#
If LSF = 1 in 409, it means that the lens switch remains ON, and the process returns.

If the lens switch is OFF in # 391, it is determined whether or not the camera is in WIM (wide mode) (# 41).
6). If it is a WIM (wide mode), it is determined whether or not the lens is a type I lens (fixed focus lens or manual zoom lens) (# 417). If it is a type I lens, the process returns. If it is not a type I lens, it is determined whether or not the lens switch flag LSF is 0 (# 418). Lens switch flag LS
If F is not 0, it means that the lens switch has changed from ON to OFF. Therefore, LSF is set to 0, and a high voltage V for the lens is used to return to the original focal length from the wide end.
Performed _LEH feeding _{(PWCL 1 = "Low")} , returns the disables interruption by the interruption terminal INT _B (# 4
19 to # 421). Also, the flags AFCF and FALF are set to 0 (# 407). If the lens switch flag LSF is 0 in # 418, the lens switch has been
Since it is determined that the zooming has been performed, the flow shifts to # 401, where it is determined whether or not the zoom is stopped (returning to the original focal length), and the above operation is performed, and the process returns.

If it is not a WIM (wide mode) in # 416, it is determined whether or not the lens switch flag LSF is 0 (# 425). If the lens switch flag LSF is 0, which means that the lens switch remains OFF, the process returns. If the lens switch flag LSF is not 0 at # 425, it means that the lens switch has changed from ON to OFF.
And return.

Next, a photometric data input routine (SUB1)
7) is described with reference to FIG. In this subroutine,
First, each photometric data is input, and the photometric error and the open aperture value are corrected (# 431, # 432). Next, the AE lock switch A is operated by operating the switch of the body or the lens.
It is determined whether or not LS has changed from OFF to ON.
If it has changed from FF to ON, the manual AE lock completion flag MALF is set to 1 and the photometric data is stored in the register MLR.
(# 433, # 434, # 439, # 44)
0). Here, the register MLR is a register for inputting photometric data at the time of manual AE lock. If both the AE lock switches ALS of the body and the lens are OFF, it is determined whether or not the AE lock flag LALF by the lens is 1 (# 435). If LALF = 1, the flow shifts to # 434. If LALF is not 1, MALF is set to 0,
The AF completion flag AFCF is determined (# 436, # 44)
2). Also, when the AE lock switch ALS remains ON, the process proceeds from # 434 to # 442, and the AF completion flag AFCF is determined. If the AF completion flag AFCF is 1, the AF / AE completion flag FALF is determined (# 444). If the flag FALF is not 1, it means that the AF completion flag AFCF has changed from 0 to 1, so that FALF = 1 is set, and photometry data is set in the register FLR (# 445, # 446). Here, the register FLR is a register for inputting photometric data at the time of AF / AE lock, and stores the first photometric data after focusing.
If the flag FALF is 1 in # 444, the photometric data is set in the register NMR in # 447. Also, in # 442, A
If FCF = 0, AF / AE lock completion flag FAL
F is set to 0, and the photometric data is set in the register NMR (# 443, # 447). Here, the register NMR is a register for inputting normal photometric data. That is, if the AE lock switch ALS changes from OFF to ON, the AF completion flag AFCF is set in the register MLR.
Is changed from 0 to 1, the photometric data is set in the register FLR; otherwise, the photometric data is set in the register NMR. The register MLR is set in the AE lock state by the AE lock switch, the register FLR is set in the AE lock state by focusing, and the contents of the NMR are set to the calculation photometric data Bvci (i = 1 to 6) in other states. Focal length fv, photometric data Bvci
From (i = 1 to 6), the luminances of the main subject and the sub subject are calculated (# 450 to # 455).

Next, the exposure calculation subroutine (SUB1)
8) will be described with reference to FIGS. 33 and 34. In this subroutine, it is first determined whether or not a flash is mounted (# 461). # 4 if the flash is attached
Go to # 62 and if no flash is attached # 4
Moves to 81, whether a dedicated AF lens respectively are mounted to determine the AF lens attachment flag LLF _1. If the dedicated AF lens is not attached in # 462, the flow shifts to # 463, and it is determined whether or not the mode is the M mode (manual mode). If the mode is M in # 463, #
At 465, the manual setting value is limited by the tuning limit speed Tvx. If the mode is not the M mode, the shutter speed Tv is set at # 464.
Is returned as the tuning limit speed Tvx. If the dedicated AF lens is attached in # 462, it is determined whether or not the lens is a type II lens (normal non-varifocal zoom lens) (# 469). If it is a type II lens, it is determined whether or not it is EXZM (zoom during exposure) (# 47)
0). In the case of the during-exposure zoom EXZM, an EXZM flash subroutine (SUB21) is executed.

This subroutine will be described with reference to FIG. First, to seek an exposure value Ev with respect to the luminance of the sub object, give priority to predetermined shutter speed TVZ _1, determine the aperture value _{Av = Ev-Tvz 1 (#} 491, # 49
2). Here, the predetermined shutter speed TVZ _1, corresponding to the exposure time capable of performing zooming while the shutter is fully opened. If the obtained aperture value is Av <Avo, the aperture value Av is limited to the open aperture value Avo, and Ev−
Avo = Tv (# 493, # 494, # 49)
5). Also, if the obtained aperture value is Avo ≦ Av ≦ Avmax
If the shutter speed Tv for directly controlling a predetermined shutter speed _{Tvz 1 (# 493, # 496} , #
499). Furthermore, if Av> Avmax, then Av-Av
It is determined whether or not max = d is d ≦ l with respect to the film latitude 1 (# 497, # 498). If d ≦ l, the flow shifts to # 499. If d> l, the compensation for the appropriate exposure cannot be performed. Therefore, an EXZM impossible warning (for example, blinking of the EXZM display) is performed, and Ev + 1−Avmax = Tv is calculated and obtained. The shutter speed Tv is limited to the tuning limit speed Tvx, the aperture value Av is limited to the minimum aperture value Avmax, and the routine returns (# 500 to # 504).

Returning to the flow of FIG. 33, if it is not a type II lens in # 469 or if it is not EXZM (zoom between exposures) in # 470, the flow shifts to steps # 471 and subsequent steps, and each exposure mode and AE Tv, A according to lock
Calculate v. First, in # 471, it is determined whether or not the M mode (manual mode) is set. In M mode, #
The shutter speed is limited similarly to 465 (# 47).
2). If not the M mode, it is determined whether or not the mode is the A mode (aperture priority AE mode) (# 473). In the A mode, the tuning speed Tvx is set as the shutter speed Tv, and the set aperture value Avs is set as the aperture value Av (#
474- # 475). If it is not the A mode, it is determined whether the manual AE lock flag MALF is 1 (# 4)
76). If MALF = 1, the shutter speed Tv and the aperture value Av are determined from the luminance of the slave subject. Here, a low shutter speed is also possible. If MALF is not 1, the shutter speed Tv and the aperture value Av are calculated based on the brightness of the slave subject.
Is determined, but the shutter speed Tv is limited by the tuning speed Tvx. EXZM flash subroutine (SUB
21), # 475, # 477 or # 478 to # 479
Then, the process calculates the difference between the control value (corresponding to the brightness of the slave subject) based on Tv and Av and the brightness of the main subject and the correction amount of the flash light intensity according to the shooting magnification, and returns.

In the natural light mode, # 461 to # 481
If the camera is not a dedicated AF lens, the set shutter speed Tvs is set to the control shutter speed T in the M mode.
v, and if not in M mode, (main subject luminance) + Sv
= Tv (# 482- # 484). #
If it is a dedicated AF lens in 481, it is determined whether or not it is a type II lens (normal non-varifocal zoom lens) (# 485). If it is a type II lens, it is determined whether or not it is EXZM (zoom during exposure) (# 486). If the lens is not a type II lens in # 485 or if it is not EXZM in # 486, an exposure control mode (P mode, S
Mode, A mode or M mode), and returns. # 4 if it is a dedicated AF lens, a type II lens, and EXZM (zoom during exposure)
After passing through 81, # 485, and # 486, the flow shifts to a subroutine (SUB22) of the zoom during exposure using the stationary light.

This subroutine will be described with reference to FIG. First, an exposure value Ev is obtained based on the main subject luminance,
Predetermined shutter speed Tvz ₂ (Tvz ₂ <Tvz ₁ )
Is given priority to calculate the aperture value Av (# 511, #
512). If the obtained aperture value is Av <Avo, the aperture value Av is limited to the open aperture value Avo, and Ev-A
vo = Tv (# 514, # 515). If the obtained aperture value is Avo ≦ Av ≦ Avmax, a predetermined shutter speed Tvz ₂ (Tvz ₂ <Tvz ₁ ) is directly used as a control shutter speed Tv (# 513, # 51).
6, # 519). Furthermore, if Av> Avmax, Av
-Avmax = d is d ≦ to film latitude 1
1 is determined (# 517, # 518). If d ≦ l, the process proceeds to # 519, and if d> l, Ev + 1−Avm
ax = Tv is calculated, and the aperture value Av is set to the minimum aperture value Avma.
x, and cannot compensate for proper exposure.
An M-impossible warning (for example, blinking of EXZM display) is performed, and the process returns (# 520 to # 522).

Here, the reason that Tvz ₂ <Tvz ₁ is that, when exposing the core image, the exposure of the core image is instantaneously performed by flash emission during flash photography, but the natural light This is because it is necessary to stop zooming for a predetermined time for exposing a core image in (steady light). Note that each of the above-described shutter speeds Tv
z ₁ and Tvz ₂ may be changed according to a zooming range of the lens or a code (not shown in the embodiment) indicating what kind of lens the lens is. Furthermore,
The photographer may set the zooming range to a value according to the set range. Further, in the embodiment, the limitation on the long time side is not performed, but the limitation on the long time side may be performed in order to avoid two cores.

Next, the exposure control routine (SUB19) will be described with reference to FIGS. In this subroutine, first, the display in the viewfinder is deleted, and the AF motor M
O ₂ is stopped, and the supply of the high voltage V _LEH for the lens is stopped (PWCL ₁ = “High”) (# 531- # 5)
33). Then, it is determined whether or not the lens is a type II lens (# 534). If it is a type II lens, E
It is determined whether or not XZM (zoom during exposure) (# 53)
5). If it is a type II lens and EXZM (exposure during exposure), data (ICPB ₅₄ = 10) indicating that the exposure control operation is being performed is set in the body status ICPB and sent to the lens (# 536 to # 540). In addition, the high voltage V _LEH for the lens is supplied (PWCL ₁ = “Lo”).
w "), zooming is started toward the shortest focal length (# 541).
Each time a CPL is input (# 542 to # 546), it is determined whether or not zooming has stopped (# 547). When it is determined that the zooming has been completed by reaching the wide end, the supply of the high voltage V _LEH for the lens is stopped (PWCL
₁ = “High”) to stop zooming (#
548). Note that the lens is not a type II lens or E
If not XZM (zoom during exposure), # 536 to # 54
8 (zoom during exposure) is skipped, and the flow shifts to # 551.

In steps # 551 to # 556, the data (Sv-Kc) (Kc is the correction data ≧ 0) of the light intensity is sent to the light metering interface LMIF, and the number of stops (Av-Av)
o) is preset in the counter, the counter interrupt is enabled, the port P _{18 is set} to the “High” level so that a pulse corresponding to the aperture amount is output from the encoder ENC, and the release magnet (= Mg ₁ ) is operated. Let's wait. When the scheduled amount is narrowed down, a counter interrupt is performed, and the counter interrupt processing is performed.

This counter interrupt will be described with reference to FIG. When this interrupt occurs, it is first determined whether or not AF is being performed (# 701). If during AF from the encoder ENC is output pulses corresponding to the rotation amount of the AF motor MO _2, the interrupt count-up of the pulse will be generated, performs an AF motor stop processing of # 771 or less . If AF is not being performed, a pulse corresponding to the amount of aperture by the aperture lever 11 is output from the encoder ENC, and an interrupt is generated by counting up the pulse. Therefore, aperture stop processing of # 702 and below is performed.
In # 702, the stop stop magnet ApMg (Mg
₂ ) is operated, and in # 703, the port P _{18 is set} to “Low”.
In a state where a pulse is output in response from the encoder ENC to the amount of rotation of the AF motor MO ₂ as the level and returns.

When a predetermined time has elapsed since the release magnet was turned on and a time for ending the mirror-up has elapsed, the front curtain running start magnet 1CMg (= Mg ₃ ) is operated to start running the front curtain ( # 556, # 55
7). Then, it is determined whether or not the lens is a type II lens (# 558). EX for a type II lens
It is determined whether or not ZM (zoom during exposure) is set (# 559).
If the lens is not a type II lens or if it is not EXZM (exposure during exposure), the exposure time is counted, and at the end of the count, the rear curtain running start magnet 2CMg (= Mg ₄ ) is operated to start the rear curtain running. Let LEN "Hig"
h ”level (# 566, # 567,
# 568). During flash photography, flash emission is started when the synchro switch Sx is turned on, and is stopped when the amount of light received by the emission reaches a predetermined amount.

# 558 is a type II lens and #
In the case of EXZM (zoom between exposures) at 559, times t ₁ and t ₂ (t ₁ <t ₂ ) different between flash photography and natural light
Are counted (# 560 to # 562). The times t ₁ and t ₂ are times for exposing the image serving as a nucleus. t ₁
Is equivalent to the time when the shutter is fully opened and the flash fires. Since t ₂ is the time required to expose the image to be nuclear in natural light, longer than t _1. Then, when t ₁ or t ₂ elapses, the power supply of the high voltage V _LEH for the lens (P
WCL ₁ = “Low”) to start zooming (# 563). Then, Tv = log at # 564
_{2 From} (1 / T), the remaining time (T-t ₁ ) or (T-t ₁ )
t ₂₎ counts, stops supplying power lens high voltage V _LEH for between # 565 count is completed (PWCL ₁ = "H
ign ") to stop the zooming and shift to the processing of # 567 and below. Although the zooming direction is from the wide side to the tele side, it may be switched from the tele side to the wide side.

Next, the AF operation will be described. AE
Operation CCD charge storage during routine (integration) is finished, an interrupt signal to the interrupt terminal INT _B is input, FIG. 3
9, the interrupt processing of # 581 and below is performed. First, data obtained by A / D-converting the charge stored in the CCD is sequentially taken in, and it is determined whether or not a photometry calculation incomplete flag LMF is 1 (# 581, # 581).
# 582). If LMF = 1, since the first time of the photometry, calculation, and display operation has not been completed, FDF = 1 is set, and the process returns to the return address (# 583). If LMF is not 1, the defocus amount and the defocus direction are calculated, and it is determined whether or not there is reliability (# 584, # 585). If reliable, the previous detection was reliable (LC
F = 0) (# 586). If LCF = 0, it means that reliability has been obtained in the first detection or the detection up to that point, and the flow shifts to # 601.

[0132] performs a calculation of DF × in _{# 601 K L × K B =} N B, obtains the amount of motor rotation to eliminate the defocus amount DF N _B (number of pulses from the encoder), # 6
Motor rotation amount in the 02 N _B and the contents of the current position register NCR, and calculates the photographing distance D based on the coefficient NDC for converting the rotation amount N from ∞ position to the photographing distance D. Then, it is determined whether or not the lens is a new lens (# 603). If it is a new lens, it is determined whether it is a type I lens (# 60)
4). If it is not a type I lens, it is a lens capable of AZP (auto zoom program), so it is determined whether or not the camera is in the AZP mode (# 605). If the lens is not a new lens, a lens capable of AZP (auto-zoom program) (Type I), or is not in the AZP mode, # 60
3, the process proceeds to compute the photographing magnification β from # 604 or # 605 to # 626, are substituted into the rotation amount N of the motor rotation amount N _B to eliminate the defocus amount DF in # 627, #
At 628, the rotation amount N is added to or subtracted from the content of the current position register NCR according to the sign, and the process proceeds to the drive amount determination routine (SUB23).

On the other hand, with a new lens of type II or III,
When performing AZP (auto zoom program),
Is in the AF operation, the body
Send the Itas ICPB and the shooting distance D to the lens (# 606
~ # 612). After waiting for a predetermined time, the body performs AF operation
Status ICPB showing lens data input in
And 4 bytes of lens data from the fifth address AD5
Data pointer DPO = 54 for specifying input_H
To the lens and wait for a fixed time (# 613 to # 61)
9). During this time, the AZP₁~ AZP_ThreeIn the case of
Calculates the shooting magnification β according to the shooting distance D, and further calculates
Focal length f_AAsk for. MLM (photographing magnification)
In the case of the ratio lock mode), the set photographing magnification β_LWhen
Focal length f for zooming from shooting distance D_AAsk for
You. This focal length f_AThe conversion coefficient NDC according to
Required for a varifocal lens (type III)
Is the focal length f at that point and the focus for zooming.
Point distance f_AOffset amount N from shooting distance D_LAsk for
You. Then, at steps # 620 to # 623, the conversion coefficient NDC (f
_A) And the focal length f for zooming_A, Shooting magnification β
And offset amount N_LAnd enter N in # 625._B± N_L×
K_B= N, and AZP (E
Zooming program).
The rotation amount N required to reach the in-focus position is calculated.

Next, a drive amount determination routine (SUB23)
42 and 43 are described. In this subroutine, first, it is determined whether or not the lens is a new lens (# 641). If it is a new lens, it is determined whether it is a type I lens (# 6)
42). If it is not a type I lens, it is a lens that can perform AZP (auto zoom program).
It is determined whether or not the mode is set (# 643). If the lens is not a new lens, a lens (Type I) for which AZP (auto zoom program) cannot be performed, or is not in the AZP mode, # 64
The process moves from # 1, # 642 or # 643 to # 671, and focus determination is performed. On the other hand, a new type II or III lens
When performing ZP (auto zoom program), use # 6
The flow shifts to 44, where focusing is performed.

First, if it is not in focus at # 671, the rotation amount N is preset in the counter, and the counter interruption is enabled.
Drives the AF motor MO ₂ in the driving direction, the process proceeds to AE routine (# 685～ # 687). If the camera is in focus at # 671, the body is performing an arithmetic operation, the body data is output, the power zoom is enabled, and the body status ICPB indicating that the AF is not activated =
010001010 and shooting distance D to the lens
After setting F = 1 and ZENF = 1, AE
The routine shifts to a routine (# 672 to # 681).

Next, if focus is achieved at # 644, it is determined whether the current focal length f ₀ is equal to the calculated focal length f _A (# 655). If f ₀ = f _A , the operation of AZP (auto-zoom program) has been completed, and it is determined that focus has been achieved, and processing proceeds to # 672 and below. Also,#
If f ₀ = f _{A is} not _{satisfied in 655} , power is supplied to the lens high voltage V _LEH to perform zooming (PWCL
₁ = “Low”), the body status ICPB indicating the body data output is sent to the lens during the AF operation, and the lens status ICPL is simultaneously input by bidirectional status communication (# 656 to # 662).

At step # 633, it is determined whether or not the zoom is stopped. If the zoom has not been stopped, the process returns to # 658 after waiting for a predetermined time in # 664. On the other hand, if the zoom is stopped in # 633, the supply of the high voltage V _LEH for the lens is stopped (PWCL ₁ = “High”), and the charge accumulation of the CCD is performed to perform focus detection and AF operation for confirmation. starts (integration), as allowed the interruption by the interruption terminal INT _B, the process proceeds to AE routine (# 665～ # 667).
Here, the reason why the AF for confirmation is necessary is that the current focal length f ₀ and the calculated focal length f _A are used when calculating the offset amount _NL in the lens. The value is not a set value but a discrete value corresponding to the resolution of the code plate. Since the offset amount _NL with a fine precision cannot be calculated, AF for confirmation is performed.

If focus is not achieved at step # 644, f is determined at step # 645.
₀ = determines whether or not the a f _A. And f ₀ = f _A
If so, the flow shifts to # 685. On the other hand, if f ₀ ≠ f _A , it is determined whether the content of the battery check register is BCR = 11 (# 646). If BCR = 11, AF
Since the motor MO ₂ and the zoom motor MO ₃ can be driven simultaneously, power is supplied to the lens high voltage V _LEH in # 650 (PWCL ₁ = “Low”), and the flow shifts to # 685. On the other hand, if BCR ≠ 11, to drive alternately the AF motor MO ₂ and the zoom motor MO ₃ at fixed time intervals, sets the predetermined value M in the timer register TIR, the timer is reset and started, timer split #
685, the AF motor MO ₂ is first driven (#
647- # 649).

Returning to the flow of FIG. 39, if it is determined in # 586 that the past focus detection result is unreliable (LCF = 1), it is highly likely that low-contrast scanning has been performed. the MO ₂ is stopped, in order to start the re-measurement, to start CCD charge storage (integration), and allowed the interruption by the interruption terminal INT _B (# 587~ # 58
9). Then, it is determined whether or not the scan direction is inverted. If the scan direction is inverted, the content of the counter is subtracted from the current position register NCR monitoring the pulse from the encoder ENC, and the scan direction must be inverted. If the contents of the counter are added (# 590 to # 59)
2). Furthermore, to erase the alarm display of the focus detection impossible, flag LCF, the process proceeds to AE routine by setting 0 to _{LCF 1 (# 593, # 594} ).

On the other hand, if it is determined in # 585 that there is no reliability, low contrast determination of # 711 and below shown in FIG. 45 is performed. First, it is determined whether or not the low contrast flag LCF is 1 (# 711). If LCF is not 1 in # 711, it is determined that there is no reliability for the first time.
# And LCF = 1 at 714, a lens driving the AF motor MO ₂ in the direction towards the adjacent, to reset the contents of the counter to 0, the process proceeds to # 725. LCF at # 711 =
If 1, the entire Rokonfuragu LCF ₁ determines whether 1 (# 715). If LCF ₁ = 1, low contrast scanning is being performed, and it is determined whether or not the end is reached (# 71).
6). LCF ₁ = 1 in # 715, or # 716
If not at the end, the process proceeds to # 725. # 716 stops the AF motor MO ₂ if terminated with, determines whether the scanning direction is already inverted (# 717, # 71
8). If the scanning direction is not reversed, # 719 ~
# Set the contents of the counter to NCR at 721 drives the AF motor MO ₂ in ∞ direction, the counter is reset to 0, the process proceeds to # 725. If the scan direction has already been reversed in # 718, it means that the focus lens has reached the ∞ position without being able to detect the focus.
A current position register and NCR = 0 at 24, the entire area Rokonfuragu LCF ₁ and 1, as ON a warning display, #
The process moves to 725. In # 725, CCD for re-measurement
To start of charge accumulation (integration), to allow an interrupt to the interrupt terminal INT _B accompanying the integration ends at # 726, the flow returns to the AE routine.

Next, a flowchart of the timer interrupt will be described with reference to FIGS. 46 and 47. When a timer interrupt occurs, the content of the timer register TIR is decremented by one, and
It is determined whether or not R = 0 (# 731, # 73)
2). If TIR ≠ 0, the timer is reset and started because the scheduled time has not elapsed (# 73).
3). If a certain period of time the timer of the shooting preparation switch S ₁ is from the OFF, and allowed the INT _A interrupt (# 73
4, # 735). If the timer is during AF, the counter interrupt is permitted (# 736, # 737). And
The process returns with the timer interrupt enabled (# 738).

At step # 732, the content of the timer register is set to TI.
When R = 0, the shooting preparation switch S₁Is ON
It is determined whether or not it is (# 741). Shooting preparation switch S₁
If the timer has been turned off, each flag LAL
Reset F, BALF, FALF, MALF, LMF
Then, only the set value is displayed, and the booster circuit DD in the body is displayed. ₁
Is stopped (PWCB = “High”), and the
Pressure V_LEHPower supply is stopped (PWCL₁= "Hig
h "), port P_{twenty two}To the “Low” level and the interrupt terminal
INT_AAnd the operation is terminated (# 74).
2 to # 746). On the other hand, in step # 741, the shooting preparation switch S
₁Is ON, it is a timer during AF and AF
Motor MO_TwoAnd zoom motor MO_ThreeIs switched.
Counter interrupt is enabled in # 747, and AF mode is set in # 748.
TA MO_TwoIs determined to be ON. AF motor MO_TwoBut
If ON, AF motor MO_TwoOFF, for lens
High voltage V_LEHPower supply (PWCL₁= ”Low”)
Then, the zoom is started (# 749, # 750). So
And the two-way status communication at # 751- # 756
The lens status ICPL is read, and is read in # 757.
Determine if the team has ended. End zoom
If so, the AF motor MO is executed in steps # 758 and # 759._Twoof
Start driving, and set the high voltage V_LEHPower off
(PWCL₁= “High”), for processing after # 763
Transition. If zooming has not been completed, # 758, #
Step 759 is skipped, and the process proceeds to step # 763 and subsequent steps.
On the other hand, at # 748, the AF motor MO_TwoIs OFF,
High voltage V_LEHPower supply (PWCL₁= ”H
igh ”), AF motor MO_TwoStarts driving and TIR
Set M = M, reset / start the timer,
Return with the interrupter allowed (# 761- # 76)
5).

Next, the counter interrupt routine will be described with reference to FIG. When this counter interrupt occurs,
It is determined whether or not AF is being performed (# 701). AF in # 701
Regarding the operation when not in the middle (stopping operation)
As described above. If # 701 in AF, it means that moves the focus lens only scheduled drive amount, to stop the AF motor MO ₂ (# 771). Next, it is determined whether or not the lens is a new lens (# 772). If it is a new lens, it is determined whether it is a type I lens (# 77).
3). If it is not a type I lens, it is a lens capable of AZP (auto-zoom program), so it is determined whether or not the camera is in the AZP mode (# 774). If the lens is not a new lens, a lens that cannot perform AZP (auto zoom program) (Type I), or is not in the AZP mode, # 77
2, the process proceeds from # 773 or # 774 to # 786, and C
CD charge accumulation (integration) to initiate, permit an interrupt to the interrupt terminal INT _B accompanying the integration ends at # 787, the flow returns to the AE routine. On the other hand, when performing AZP (auto zoom program) with a new lens of type II or III, B
It is determined whether CR = 11 (# 775). If BCR # 11 in # 775, high voltage V _LEH for lens in # 776
(PWCL ₁ = “Low”) to start zooming, wait for a predetermined time in # 777, and then proceed to # 778 and below. On the other hand, if BCR = 11, the AF motor MO ₂ and the zoom motor MO ₃ are driven at the same time, and the process immediately proceeds to # 778 and below. # 778 ~
In # 782, the lens status ICPL is input through bidirectional status communication, and in # 783, it is determined whether or not the zoom is stopped. If the zoom is not stopped in # 783, the process waits for a predetermined time in # 784 and returns to # 778. If the zoom is stopped in # 783, the power supply of the lens high voltage V _LEH is stopped in # 785 (PWCL ₁ = “H”).
igh "), to perform focus detection for confirmation, # 78
To start CCD charge storage (integration) at 6, to allow an interrupt to the interrupt terminal INT _B accompanying the integration ends at # 787, A
Return to the E routine.

Next, the lens routine (SUB6) will be described with reference to FIG.
9 In this subroutine, a lens data input routine (SUB30) and a zoom routine (SUB1)
5) The lens switch routine (SUB16) is called in this order. Lens data input (SUB3
The subroutine (0) will be described with reference to FIG. This subroutine, first, a bidirectional signal line LBL and the signal transmission line to the lens from the body the port P ₂₂ as "High" level (# 801). Then, a body status ICPB indicating that the body is inoperative, zoom is possible, and a body data output is set, the body status ICPB is sent to the lens by bidirectional status communication, and the lens status ICPL is input from the lens, and the port P is set.
₂₂ to the "Low" level and returns (# 802
~ # 807).

Next, FIG. 50 shows a subroutine (SUB8) based on activation by turning on the AE lock switch ALS. In this subroutine, first, the photometry enable signal LMEN is set to the “Low” level, and then the dedicated A
Whether F lens is mounted is determined by the AF lens attachment flag _{LLF 1 (# 811, # 812} ). When the dedicated AF lens is attached, the process proceeds to the AE routine, and when not attached, the process proceeds to # 297 (FIG. 21).

Next, a SYS routine (SUB9) called when the system reset key 4 is pressed is shown in FIG.
1, and will be described with reference to FIG. When this subroutine is called, first determines whether or not a dedicated AF lens is mounted by the AF lens attachment flag LLF ₁ (#
345). If LLF _{1 is} not 1, it means that the dedicated AF lens is not mounted, and the flow shifts to # 856. On the other hand, if LLF ₁ = 1, it means that the dedicated AF lens is mounted, and the focus lens is retracted to the ∞ position (# 816 to # 819). That is, the AF motor MO ₂ driving starts towards ∞ position, repeating the operation determines whether the termination waiting a predetermined time, if it is determined that termination to stop the AF motor MO _2. When the focus lens is stopped down to the position ∞, # 82
If 0, the current position register is set to NCR = 0, and the lens data input routine (SUB30) is executed. Then, it is determined whether or not the attached lens is a new lens (# 83).
1). If it is not a new lens, the flow shifts to # 856. If the lens is a new lens, the lens switch mode LMO _{2 is set} to O _H to disable the function by the lens switch (# 83).
2). Then, data 01110010 indicating system reset, body data output, and power zoom enabled is set in the body status ICPB (# 833). Also,
Setting the lens mode LMO ₁ and the lens switch mode LMO ₂ to the mode buffer MOB (# 834). #
In 835- # 842, the set body status IC
The contents of the PB and the mode buffer MOB are sent to the lens.
In step # 843, the lens switch mode LMO ₂ is displayed. Here, since the function by the lens switch is disabled, the display of the lens switch mode LMO ₂ is deleted.

[0147] Next, it is determined whether the lens # 851 in Type I, if type I lenses, erases the display of the lens mode LMO ₁ proceeds to # 855. # 85
If it is 1 and not a type I lens, EXZM in # 852
It is determined whether or not (exposure zoom). EXZ at # 852
If not M, the process proceeds to step # 854 and the lens mode LMO
Display ₁ If it is EXZM in # 852, it is determined whether or not the lens is a type II lens (# 853). If Type II lens, the display of the lens mode LMO ₁ proceeds to # 854. If the type II of the lens, to erase the display of the lens mode LMO ₁ proceeds to # 855. And performs display of the lens mode LMO ₁ according to the above # 851～ # 854 the lens type. After displaying or erasing the lens mode LMO ₁ in # 854 and # 855, the exposure control mode is set to P in # 856.
In step # 857, the set value is displayed. In step # 858, the process returns after waiting for the switch SYS corresponding to the system reset key 4 to be turned off.

Next, the MOS routine (SUB10) called when the mode switch MOS is turned on by pressing the mode key 3 will be described with reference to FIG. In this subroutine, first, it is determined whether or not MOR = 11 in the mode register (# 861). If MOR = 11,
The process proceeds to # 862, where MOR = 00. MOR = 11
If not, the flow shifts to # 863, where MOR = MOR + 1. Here, the mode register MOR is a 2-bit register for selecting four types of exposure control modes.
P mode (program mode) when MOR = 00,
When MOR = 01, S mode (shutter speed priority A
E mode), A mode when MOR = 10 (Aperture priority A
E mode), M mode (manual mode) is selected when MOR = 11. Therefore, each time the MOS routine is called, the exposure control mode is changed from the P mode to the S mode, from the S mode to the A mode, from the A mode to the M mode, and from the M mode to the P mode. # 8
At step 64, the set mode is displayed, and at step # 865, the process returns after waiting for the mode switch MOS to be turned off.

Next, the FUS routine (SUB11) called when the function switch FUS is turned on by pressing the function key 2 will be described with reference to FIG. In this subroutine, first, whether or not a dedicated AF lens is mounted is determined by an AF lens mounting flag LL.
Checked by F ₁ (# 871). If LLF ₁ = 1, the dedicated AF lens is not mounted, and the flow shifts to # 875 to set the function register to FUR = 00,
Disable the function. In # 871, LLF ₁ =
If it is 1, the dedicated AF lens is attached, and the lens data input subroutine (SUB30) is executed to determine whether or not the lens is a new lens (# 872). If it is not a new lens, proceed to # 875 to disable the function,
If it is a new lens, it is determined whether or not FUR = 11 in # 873. If FUR = 11, the flow shifts to # 875 and FUR #
If it is 11, the process proceeds to # 874, and 1 is added to the contents of the function register FUR. Here, the function register FUR is a 2-bit register for selecting four types of functions. When FUR = 00, the function does not operate, and when FUR = 01, the function is AL.
M (AE lock mode), RLP when FUR = 10
M (release priority mode), AV when FUR = 11
SM (aperture setting mode) is selected. Therefore, every time this FUS routine is called, the function is disabled → ALM, ALM → RLPM, RLP
M → AVSM, AVSM → non-operation. # 876
Then, the setting contents of the function are displayed, and after the function switch FUS is turned off at # 877, the process returns.

Next, an up / down routine (SUB1) called by operating the up key / down lever 7
2) will be described with reference to FIGS. 55 and 56. First, data 0100110 indicating that the body is inoperative and lens data input is set in the body status ICPB, and 13 _H is set in the data pointer DPO (# 881, # 88).
2). Here, the fact that the data pointer is DPO = 13 _H means that three bytes of lens data are input from the first address AD1. # 883 to # 8
At 88, the set body status ICPB and the data pointer DPO are sent to the lens. At # 889 to # 894, the lens is opened from the lens at an open aperture value Avo and a minimum aperture value Avma.
x, the lens data of the aperture value deviation amount △ Avz are input.

Next, it is determined whether or not the exposure control mode is the M mode (manual mode) (# 895). If the mode is the M mode, it is determined whether or not the lens switch is ON (# 896). If the lens switch is ON, AVS
It is determined whether the mode is M (aperture setting mode) (# 897).
If the lens switch is not ON in # 896, or # 89
7 and not AVSM, manual Av switch MA
It is determined whether S is ON (# 898). A in # 897
If it is a VSM or if the manual Av switch MAS is ON in # 898, the aperture value Av is raised or lowered by 0.5 Ev, and the set aperture value Av is limited according to the data from the lens (# 899, # 900). On the other hand, when the lens switch is OFF and the manual Av switch MAS
Is not in the AVSM (aperture setting mode) even if the lens switch is ON or the lens switch is ON.
When the v switch MAS is also OFF, the shutter speed Tv is increased or decreased by 1 Ev (# 90).
1). This shutter speed Tv is also limited by the shortest and longest shutter speeds (# 902).

At # 895, M mode (manual mode)
If not, it is determined whether or not the mode is the A mode (aperture priority AE mode) (# 903). In A mode, aperture value A
v is increased or decreased (# 899, # 900).
If not A mode, S mode (shutter speed priority A
E mode) is determined (# 904). If the mode is the S mode, the shutter speed Tv is increased or decreased (# 901, # 902). If the mode is not the S mode, it means the P mode (program mode), and the flow shifts to # 905. M mode, A mode, S mode #
The process proceeds from # 900 or # 902 to # 905, where the set value is displayed. If the up switch UPS and the down switch DOS are both OFF in # 906, the process returns.

Next, the operation of the microcomputer CPUL in the vari-focal lens will be described. The lens is mounted on the body, power supply of the lens low voltage V _LEL is started, and “Lo” is applied to the reset terminal REL of the microcomputer CPUL in the lens.
When the reset signal at the w ″ level is input, the reset operation shown in FIG. 57 is performed. First, the flag, the register, and the port are reset at # 1001, the display is erased at # 1002, and the port P ₃₆ at # 1003. as "High" level, and ready to enter the lens select signal CSL from the body, and can accept INT ₁ interrupt that occurs when this signal CSL becomes "Low" level,
Stop operation. As a result, a state of waiting for the above-described lens communication operation is established.

Next, each switch LMS, LE of the lens
When any of S, TeS, WiS is turned ON
Has an interrupt terminal INT₀Interrupt. This percent
58 to 60 will be described. First,
It is determined whether or not the lens switch LES is ON (# 101
1). Power zoom if lens switch LES is ON
It is determined whether or not it is (# 1012). Power zoom
For example, it is determined whether or not MLM (imaging magnification lock mode) is set.
(# 1013). If MLM, flag LSF₀Is 1
It is determined whether or not there is (# 1014). This flag LS
F₀Is whether the lens switch LES was previously ON
This is a flag for determining whether LSF ₀= 1
This means that the lens switch LES remains ON.
Therefore, the process proceeds to a stop routine. LSF₀= 1
Then the lens switch LES changes from OFF to ON
LSF₀= 1 (# 10
15). Then, whether the lens switch flag LSF is 1 or not
Is determined (# 1016). This lens switch hula
If LSF = 1, the lens switch is set.
The lens switch is reset if LSF = 0
Indicates a state. LSF must be 1 in # 1016
If it is, LSF = 1 is set in # 1017, and the routine proceeds to the stop routine.
Run. This indicates that the lens switch is set.
Remembered. If LSF = 1 in # 1016,
In the mode, the lens switch LES is already ON from OFF
It changes and the lens switch is set
LSF = 0, MLF = 0, and
Shooting magnification β_LDisplay and move to the stop routine.
(# 1018 to # 1020). This allows the lens
The switch is stored in the reset state.

If it is not MLM (photographing magnification lock mode) in # 1013, it is determined whether or not it is WIM (wide mode) (# 1025). If not WIM, ALM (AE
Lock mode) is determined (# 1026). If the zoom is not PZOOM (power zoom) in step # 1012, the zoom is a manual zoom.
The determination of whether it is M (# 1013, # 1025) is omitted, and A
It is determined whether or not LM (AE lock mode) (# 102)
6). If it is not ALM, the process proceeds to a stop routine. #
Determined as WIM in 1025 or ALM in # 1026
When it is determined that, the decision as to whether or not the flag LSF ₀ is one in # 1027. If LSF ₀ = 1, it means that the lens switch LES remains ON, so that the routine shifts to the stop routine. If LSF ₀ = 1, the lens switch LES has changed from OFF to ON, so # 1028 To set LSF ₀ = 1, and determine the lens switch flag LSF in # 1029. If LSF = 1, LSF = 0 in # 1031, and if LSF = 1, LSF = 1 in # 1030. That is, each time the lens switch LES changes from ON to OFF, the lens switch is alternately switched between the set state and the reset state.
Next, in # 1032, it is determined whether or not the body is inoperative.
If the body is not operating, the ports P ₃₆ and P ₃₅ are set to “Low” level for a certain period of time to notify the state from the lens to the body to the interrupt terminal INT _A of the microcomputer CPUB in the body via the bidirectional signal line LBL. Send a start signal,
Thereafter, the ports P ₃₅ and P ₃₆ are returned to the “High” level (# 1033 to # 1037). If the body is not inoperative in # 1032, the state can be transmitted by the communication of the next signal.

At step # 1011 the lens switch LES is turned on.
If not, it is determined whether the tele switch or the wide switch is ON (# 1041, # 1042). If either of them is ON, it is determined whether or not PZOOM (power zoom) is set (# 1043). If it is a PZOOM (power zoom), the process proceeds to step # 1032 and the above-described operation is performed. Whether both the tele switch TeS and the wide switch WiS are OFF, and if either is ON, if it is not a PZOOM (power zoom), the flow shifts to # 1044 to determine whether or not the lens mode switch LMS is ON. Is determined. If the lens mode switch LMS is OFF, the process proceeds to a stop routine. Lens mode switch L
MS is If ON, the flag LSF ₁ determines whether it is 1 (# 1045). LS when the flag LSF ₁ is a lens mode switch LMS is ON previously
F ₁ = 1, and when it was OFF before, LSF ₁
= 0. If LSF ₁ = 1 in # 1045, it means that the lens mode switch LMS remains ON, and the process proceeds to the stop routine. L at # 1045
If SF ₁ = 0, the lens mode switch LMS is set to O
Since it is changed from FF to ON, # 10
At 46, LSF ₁ = 1, and at # 1047, it is determined whether or not AZP (automatic zoom program). If it is not AZP, the process proceeds to the stop routine. If it is AZP, each flag LSF
₀ , LSF, and MLF are reset to 0, and the locked photographing magnification β _L is deleted (# 1048 to # 1051). This is a countermeasure for a case where the mode is switched within the AZP (auto zoom program) when the magnification is locked in the MLM (photographing magnification lock mode).

Next, it is determined whether or not the content of the auto zoom program register is AZR = 100 (# 10)
52). Here, the auto zoom program register AZ
R is a 3-bit register for switching between four types of modes in AZP (auto zoom program).
The first auto-zoom program AZP ₁ when AZR = 001, the second auto-zoom program AZP ₂ when AZR = 010, and the third auto-zoom program AZP ₃ when AZR = 011 and AZR = 100 MLM (photographing magnification lock mode) is selected. If AZR = 100 (MLM) in # 1052,
AZR = 001 (AZP ₁ ) in # 1054, and # 10
At 58, the lens mode LMO ₁ is displayed, and the routine proceeds to a stop routine. If AZR is not 100 in # 1052, #
At 1053, the content of the auto-zoom program register AZR is increased by one, and at # 1055, it is determined whether or not AZR = 100. If AZR = 100 in # 1055, the lens switch LES is a switch for locking the photographing magnification, so that the lens switch mode LMO ₂
Is erased, the fact that MLM (photographing magnification lock mode) is set is displayed, and the routine proceeds to a stop routine (# 105).
6, # 1057). If AZR is not 100 in # 1055, the lens mode LMO ₁ (AZP _1-
AZP ₃ ) is displayed, and the routine proceeds to a stop routine.

In the stop routine, the interruption is permitted and the lens
LSF if switch LES is OFF ₀= 0, lens
LSF if mode switch LMS is OFF₁= 0 and
Then, the operation is stopped (# 1061 to # 1065).

Next, the microcomputer CPU in the lens from the body
The interrupt routine interrupt signal L interrupt terminal INT ₁ "Low" level is called when entered, Figure 61
To 64 and will be described.

In this interrupt routine, first, the lens stay
The task ICPL is set (# 1071 to # 1093).
First, the bit b of the lens status ICPL₇, B₆
Is set to 01 because it is a new lens (# 1071). Next
Next, it is determined whether or not PZOOM (power zoom) is set (#
1072). For power zoom, use # 1073
Status ICPL bit b_Three, B_Two, B₁To 10
0 is set, and M is set in # 1075, # 1076, and # 1077.
LM (shooting magnification lock mode) or WIM (wide mode
C) or ALM (AE lock mode). #
If it is not the power zoom in 1072, the lens is
Status ICPL bit b_Three, B _Two, B₁To 10
Set 1 and ALM (AE lock mode) at # 1077
It is determined whether or not. # 1075, # 1076, # 107
7 as MLM, WIM or ALM
When set, whether the lens switch flag LSF is 1
It is determined whether or not it is (# 1078). ALM (AE Rock Mo
Mode), is the lens switch LES turned off once?
From ON to OFF and then from OFF to ON
During the period, the lens switch flag LSF is 1.
If the lens switch flag LSF is 1 in # 1078,
Bit b of the lens status ICPL_Five, B _FourTo 11
It is set (# 1089). Lens switch at # 1078
If the flag LSF is 0, the flow shifts to # 1082. # 1
If 077 and not ALM (AE lock mode),
RLPM (release priority mode) in # 1079 and # 1080
) Or AVSM (aperture setting mode). R
If it is LPM or AVSM, the lens switch LES
It is determined whether it is ON (# 1081). Lens switch
If LES is ON, proceed to # 1089 to change the lens
Bit b of the Titus ICPL_Five, B_FourSet to 11
You. RLPM and AVSM at # 1079 and # 1080
If neither, or any of the above
When the lens switch LES is not ON, # 10
82 to determine whether it is PZOOM (power zoom) or not.
Set. With power zoom, you can zoom from the body
It is determined whether or not a signal is being input (# 108).
3). Not power zoom in # 1082 or # 10
No zoom enable signal is input from the body at 83
Then, the bit b of the lens status ICPL_Five, B
_FourIs set to 00 (# 1087). Power at # 1082
-A signal that allows zooming and zooming from the body at # 1083
If the number is being input, # 1084, # 108
Tele switch or wide switch is turned on at 6.
It is determined whether or not. Teleswitch is ON at # 1084
Lab lens status ICPL bit b_Five, B_FourTo 0
1 is set (# 1085). Wide switch in # 1086
If the switch is ON, the bit b of the lens status ICPL
_Five, B_FourIs set to 10. In # 1084, # 1086
If neither the tele switch nor the wide switch is ON, # 1
087, the bit b of the lens status ICPL
_Five, B_FourIs set to 00.

In steps # 1089, # 1087, # 1088, or # 1085, bits b ₅ ,
After setting the b _4, it determines whether or not the zoom # 1091. 1 to the least significant bit b ₀ of the lens status ICPL If during zooming, the bit b ₀ if not during zooming
Is set to 0 (# 1092, # 1093). And
At step # 1094, the lens status ICPL is output, and the body status ICPB is read.

When the body status ICPB is read,
The flow shifts to the flow of FIGS. 63 and 64, and in # 1101, it is determined whether or not it is a new body (ICPB ₇₆ = 01). If not, a new body, is that they are old body, and outputs the lens data Avo~f _0, lens select signal CSL come is input to the port P ₃₄ is waiting to become a "High" level, PZOOM (Power zoom) is determined, and if the power zoom is set, a warning display is performed because the power zoom cannot be performed with the old body (# 1102).
~ # 1105). Note that the terminal J
_{There are only terminals 12} (low voltage V _LEL for lens), J ₁₃ (lens select signal CSL), J ₁₅ (serial input SIN), J ₁₆ (serial clock SCK), and J ₁₇ (ground line G ₁ ). Next, the lens mode LMO ₁ , the lens switch mode LMO ₂ , the current focal length f ₀ , and the shooting distance D are erased, the flag and the register are reset, and the operation with the interrupt terminal INT ₁ enabled. It stops (# 1106 to # 1110).

When the body is determined to be a new body in # 1101,
Is the body data input (ICPB_Two= 0) or lens day
Data output (ICPB_Two= 1) (# 111)
5). If body data is input, proceed to # 1116,
Lens data output, the lens data shown in FIGS.
Move to data output routine. In # 1116, the body
Non-operation (ICPB₅₄= 00) is determined. body
Is not activated, the next data is the body in # 1117
While waiting for an input from port P at # 1118
₃₄Waits until the level becomes “High” level. And bode
Port P without any data input from₃₄Is "Hig
h ”level, the body-side power switch PWS
Is ON (ICPB_Three= 0) or not (# 111)
9). Power zoom if power switch PWS is ON
Move to the routine (Fig. 65, Fig. 66)
If PWS is OFF, delete the display at # 1120 and stop
Move to routine.

Power zoom routine shown in FIGS. 65 and 66
In, INT₁Can be interrupted, and PZOOM (power
(# 1151, # 115)
2). If it is a power zoom, the zoom
State (ICPB) ₁= 1)
(# 1153). No power zoom at # 1152
Or, in # 1153, a zoom enable signal is input from the body
If it is determined that there is no state,
Shift to the current focal length f₀Is displayed and returns.
Power zoom in # 1152, # 1153, body
Is determined to be in a state where a zoom enable signal is being input from
When the shooting preparation switch S₁Is turned on
It is determined whether or not (# 1154). Shooting preparation switch S
₁If is ON, AZP (Auto Zoom Program)
It is determined whether or not it is (# 1155). If it is AZP, #
1178, the current focal length f₀Display and Rita
To Shooting preparation switch S₁If is OFF, #
It skips 1155 and moves to # 1156. Also,
Shooting preparation switch S₁Must be AZP even if is ON
For example, the process proceeds to # 1156. In # 1156, # 1158
Determines whether the tele switch or wide switch is ON.
Set. # 1156, Teleswitch and W
If both id switches are not ON, go to # 1178
Transition. If the tele switch is ON at # 1156,
In # 1157, the current focal length f₀Is the focal length f at the telephoto end
_TIt is determined whether or not the wide switch has been reached at # 1158.
If ON, the current focal length f in # 1159₀But
Focal length f_WIs reached. # 1157
Or # 1159 for f₀= F_TOr f₀= F_WIt is determined that
When it is determined, the process proceeds to # 1178. # 1157
And f₀≠ f_TIs determined, or f in # 1159₀≠
f_WWhen it is determined that the timer has been set, the timer is started in # 1160.
Let me start. In # 1161 and # 1162, the timer
Until the time is up, the high voltage V for the lens_LEH
Power supply start (P₃₉= “High”). # 1162
If the timer times out, go to # 1178
I do. # 1161 before the timer expires
High voltage V for lens_LEHIs supplied, the flag LS
Reset F, MFL, WIF to 0 and lock
Shadow magnification β _LAnd turn off wide mode warning
(# 1163 to # 1167). And at # 1179
Current focal length f₀To register f₀’
In # 1168, it is determined whether the tele switch is ON. Te
If the re-switch is ON, the zoom motor MO_ThreeThe tele end
Focal length f_TDrive toward and the tele switch is ON
If there is no zoom motor MO_ThreeIs the focal length f of the wide end_W
(# 1169, # 1173). Telephone
Direction zooming (# 1169) is started.
When the switch is ON, the current focal length f₀Is the end of the tele
Point distance f_TNot reached and high voltage V for lens_LEHIs powered
(P₃₉= ”High”)
As long as it is satisfied, the loop from # 1170 to # 1172
And one of the above three conditions is not satisfied.
Then, at # 1177 zoom motor MO_ThreeStop the #
The current focal length f at 1178₀Display and return
You. Similarly, zooming in the wide direction (# 1173)
When started, the wide switch is turned on and the current focus
Point distance f₀Is the focal length f at the wide end_WNot reach
High voltage V_LEHIs powered (P₃₉= "Hig
h ”) as long as the three conditions are satisfied, # 11
Looping through the loop from 74 to # 1176, the above three conditions
If one of them is not satisfied, zoom
Data MO_ThreeIs stopped, and the current focal length f is set at # 1178.
₀Is displayed and returns.

[0165] Returning to the flow of FIG. 63, when there is data input from the body in # 1117, reads the mode buffer MOB, port P ₃₄ waits for the "High" level (# 1123, # 1124) . And
It is determined whether or not it is EXZM (zoom during exposure) (# 112)
5). If it is not EXZM, it is determined whether or not it is PZOOM (power zoom) (# 1126). E at # 1125
When it is determined that the XZM, or when it is determined that it is not power zoom in # 1126, and erases the display of the lens mode LMO ₁ in # 1128, the process proceeds to # 1129. # 1125, when it is determined that the power zoom not EXZM in # 1126, performs display of the lens mode LMO ₁ in # 1127, the process proceeds to # 1129.

In # 1129, it is determined whether or not the zoom mode is PZOOM (power zoom). # 1 if not power zoom
MLM at 130, # 1131 (shooting magnification lock mode)
Or WIM (wide mode) is determined. In the case of MLM or WIM, the lens switch LES serves as a switch for magnification lock or wide zoom and release thereof, and the display of the lens switch mode LMO ₂ becomes meaningless.
The display is deleted (# 1132). # 1130, # 1
In 131, it is determined that the MLM is not a WIM, or # 1
If it is determined in 129 that the power zoom is set, the lens switch mode LMO ₂ is displayed (# 113).
3). The flow shifts from # 1132 or # 1133 to # 1134 to display the current focal length f ₀ . If the system is reset, it is displayed that the lens position is ∞, and the process proceeds to a stop routine (# 1135, # 1136). If the power switch PWS is OFF, it is desirable that these displays are also erased.

On the other hand, the body is operating at # 1116 (IC
If PB ₅₄ ≠ 00), system reset (ICPB ₅₄
= 11) is determined (# 1121). If the body is a system reset, the process proceeds to AF routine, if the system reset, if there is data input from the body, or the port P ₃₄ waits for the "High" level (# 1122, # 1141) . If there is data input from the body, it is an operation by the system reset key,
The process moves to # 1123. On the other hand, the port P ₃₄ is “Hig
if the h "level, the power switch PWS is when the lens is mounted when OFF, the after the variable interrupts INT _1, to move the lens to the focal length f _S total length is shortest ( # 1142 to # 1148) Specifically, it is determined whether or not the current focal length f ₀ is the shortest focal length f _{S of the} entire length, and if f ₀ = f _S , the process proceeds to # 1134. And if f ₀ ≠ f _S , # 114
4 and feed the high voltage V _LEH for the lens (P ₃₉ = "
When the lens high voltage V _LEH is supplied, the current focal length f ₀ is retracted to the register f ₀ ′, and the zoom motor MO ₃ is driven toward the focal length f _S. (# 1145, # 1146) When the current focal length f ₀ reaches the focal length f _S at which the overall length becomes the shortest, the zoom motor MO ₃ is stopped, and # 113 is reached.
4 (# 1147, # 1148).

If the body is not system reset (ICPB ₅₄ = 11) in # 1121, the flow shifts to the AF routine shown in FIG. 67, and in # 1181, AF is being performed (ICPB ₀ =
1) It is determined whether or not. If AF is in progress, # 1182
# Have data input from the body in 1183, but or port P ₃₄ waits to become "High" level. # 11
If the port P ₃₄ becomes “High” level at 83, PZ
It is determined whether it is OOM (power zoom) and AZP (auto zoom program) (# 1184, # 1185).
If it is determined in step # 1184 that the zoom is not the power zoom,
If it is determined in 185 that it is not AZP, # 118
In step 8, the interrupt is enabled and the process proceeds to the stop routine. # 1
184, when it is and determined AZP with power zoom # 1185, and allowed the interruption by the interruption terminal INT ₁ at # 1186, the process proceeds to AZP routine.

On the other hand, in step # 1182, data is input from the body.
If you have the power, enter the shooting distance D and₃₄Is "Hi
gh ”level (# 1191, # 119
2). Then, it is determined whether or not it is PZOOM (power zoom).
(# 1193). AZP for power zoom
₁~ AZP_ThreeIt is determined whether or not (# 1194). AZP
₁~ AZP_ThreeIf it is any of the first, the first shown in FIG.
Auto zoom program (AZP₁), Shown in FIG.
2 auto zoom program (AZP_Two) Or FIG.
The third auto-zoom program (AZP_ThreeEach)
Calculate the magnification from the shooting distance D and the focal length
f_A, Offset amount N_LIs calculated (# 1195). #
AZP at 1194₁~ AZP_ThreeOtherwise, MLM
It is determined whether the mode is the shadow magnification lock mode (# 119).
7). If it is MLM, the lens switch flag LSF is 1
It is determined whether or not it is (# 1198). MLM at # 1197
Or, even if it is MLM, lens switch at # 1198
Is not 1 or the power is at # 1193
If not zooming, stop at # 1194, allowing interrupts.
Move to stop routine. ML at # 1197, # 1198
M (Shooting magnification lock mode) and lens switch
When it is determined that the LSF is 1, MLF = 1
(Lock magnification β_LIs determined (# 11 is complete) (# 11)
99). Lock magnification β with MLF ≠ 1_LIf the memory is not complete
For example, shooting distance D and current focal length f₀To lock magnification β
_LIs calculated and stored, and the lock magnification β_LIs displayed, and MLF = 1
(# 1201 to # 1203). Also, # 1199
If MLF = 1, the lock magnification β_LAnd shooting distance D
Focal length f_AAnd offset amount N_L(# 12)
00).

Next, if AF is not being performed in # 1181, FIG.
The process proceeds to step # 1211 shown in FIG.
C) is determined. If WIM at # 1211
To the interrupt routine INT₁Can be interrupted by
And determines whether or not it is PZOOM (power zoom).
(# 1212, # 1213). If not power zoom
Shift to # 1225, if power zoom
Switch flag LSF is 1 (# 12).
14). If LSF = 1, the wide flag WIF is 1
It is determined whether or not there is (# 1215). WIF = 1
If present, the current focal length f₀Is the focal length f at the wide end_W
Is determined (# 1216). f ₀= F_Wso
If there is, shift to # 1225, f₀≠ f_WIf wide
Zoom to the edge. First, the timer is started in # 1217.
And the timer is tied at # 1218 and # 1219.
The lens high voltage V_LEHPower supply
(P₃₉= “High”). Timer at # 1219
When the time is up, the process proceeds to # 1225. # 1
High voltage V for lens at 218_LEHPower supply (P₃₉= "Hig
h ”) is determined, the current focal length f₀The register
f₀’To the zoom motor MO_ThreeThe wide end
Focal length f_W(# 1220, # 122)
1). And f₀= F_WOr high voltage for lens
Pressure V_LEHPower supply stops (P₃₉= ”Low”)
Loop around the loop of # 1222, # 1223, and go to the wide end
Continue zooming. High voltage V for lens at # 1223
_LEHPower supply stops (P₃₉= “Low”), zoom
The motor MO3 is stopped (# 1224). And les
Reset switch flag LSF and wide flag WIF
(# 1225, # 1226). In addition, the current
Focal length f₀Is displayed and interrupts are permitted and the stop routine
The process proceeds (# 1246, # 1247).

On the other hand, if it is determined in step # 1222 that f ₀ = f _W , it means that the wide end has been reached. Therefore, the zoom motor MO ₃ is stopped, the wide flag WIF is set to 1, and a wide mode warning is issued. Shift to # 1246 (# 122
7 to # 1229). The warning in the wide mode is issued while the camera is at the wide end.

On the other hand, if LSF is not 1 in # 1214, it is determined whether or not the wide flag WIF is 0 (# 1214).
30). If WIF = 0, the process moves to # 1246 without doing anything. If the wide flag WIF is not 0 at # 1230, the original focal length (stored as f _M ) is restored. First, supply of the high voltage V _LEH for the lens (P ₃₉ = “H
igh ”), the focal length saved in the register f ₀ ′ is stored as the original focal length f _M , the current focal length f ₀ is saved in the register f ₀ ′, and the zoom motor M
O ₃ is driven toward the original focal length f _M (# 123
1 to # 1233). Then, the current focal length f ₀ returns to the original focal length f _M or the lens high voltage V _LEH
# 123 until the power supply to the power supply stops (P ₃₉ = “Low”)
4, loop # 1235. If it is determined in step # 1235 that power supply to the lens high voltage V _LEH is to be stopped (P ₃₉ = “Low”), the zoom motor MO ₃ is stopped in step # 1236, and the _{process proceeds} to step # 1225. Also, in step # 1234, f ₀ =
f _M , the zoom motor MO ₃
Is stopped, the wide flag WIF is reset to 0, the warning of the wide mode is released, and the process proceeds to # 1246 (#
1237 to # 1239).

Next, if it is not WIM in # 1211, the flow shifts to the D input routine shown in FIG. In this routine, first, an EXZM (zoom during exposure) subroutine (S
UB40). Then, whether there is data input from the body, or the port P ₃₄ until the "High" level, # 1241, and circulated around the loop of # 1242.
If there is data input from the body in # 1241, and inputs the data of the object distance D, the port P ₃₄ is waiting for the "High" level, display the photographing distance D, # 124
No. 6 (# 1243 to # 1245). Also, the port P is set at # 1242 while there is no data input from the body.
_{If 34} becomes the "High" level, # 1246 is left as it is.
Move to

Next, a subroutine of EXZM (zoom during exposure) will be described with reference to FIGS. 72 and 73. In this subroutine, it is first determined whether or not exposure is being performed (# 126).
1). If the exposure is being performed, it is determined whether or not PZOOM (power zoom) is set (# 1262). If it is not being exposed in # 1261, or if it is not power zoom in # 1262,
The interruption is permitted, the current focal length f ₀ is displayed, and the process proceeds to the stop routine (# 1263, # 1264). # 12
Is determined that the exposure at 61, and if it is judged that the power zoom in # 1262, determines whether the current focal length f ₀ is the focal length f _W of the wide end (# 126
5). If f ₀ = f _W , the process proceeds to # 1278, where f ₀ ≠
f _W is long if lens high voltage V _LEH feed for (P ₃₉ = "H
IgH ") awaiting shifts the zoom motor MO ₃ the focal length f _W of the wide end (# 1266, # 126
7). Then, it is determined whether the current focal length f ₀ reaches the focal length f _W at the wide end, the power supply stop (P ₃₉ = “Low”) of the lens high voltage V _LEH is determined, or the bidirectional signal line is transmitted from the body. to the lens select signal CSL is inputted to the port P ₃₄ through LBL becomes "Low" level, # 1268, # 1269, and circulated around the loop of # 1270. Once in # 1268 and f ₀ = f _W, it means that reaching the wide end, stops the zoom motor MO ₃ in # 1277, the process proceeds to # 1278. In step # 1269, the power supply to the high voltage V _LEH for the lens is stopped (P
_{When 39} = “Low”), the zoom motor MO ₃ is stopped, the current focal length f ₀ is displayed, the interrupt is permitted, and the operation is terminated (# 1274-1276). on the other hand,#
At 1270, the lens select signal CSL from the body becomes "
If the Low "level (P ₃₄ =" Low "), and since it is that has been requested the status communication from the body, the least significant bit of the lens status b ₀ = 1 and (during zooming), the lens status ICPL and outputs the (# 1271, # 1272). Then, waiting to return to port P ₃₄ or "High" level in # 1273, # 1
The loop from 268 to # 1270 is circulated again.

[0175] # 1265 or # 1268 at f ₀ = f _W, and the shifting to # 1278, the lens select signal CSL is inputted to the port P ₃₄ via a bidirectional signal line LBL from the body becomes "Low" level Wait for
If the port P ₃₄ goes to “Low” level in # 1278,
Since the status communication is requested from the body, the least significant bit of the lens status ICPL is set to b ₀ = 0 (zoom stop), and the lens status IC
The PL is output (# 1279, # 1280). And
# Wait for port P ₃₄ is "High" to return to the level in 1281, by exposure of the film is started, the feeding of the lens high voltage V _LEH for is temporarily stopped at # 1282 (P ₃₉ = "
Low "), power is supplied again at # 1283 (P ₃₉ =" Hig "
h ″), the zoom motor M is started at # 1284.
The O ₃ towards: focal length f _T of the telephoto end is zooming. Either the current focal length f ₀ reaches the telephoto end focal length f _T , or the power supply of the high voltage V _LEH for the lens is stopped (P ₃₉ = "
Until “Low”) is determined, # 1285, # 128
Loop 6 If f ₀ = f _T at # 1285, or if it is determined at # 1286 that power supply to the lens high voltage V _LEH is stopped (P ₃₉ = “Low”), the zoom motor M
The O ₃ is stopped, an interrupt and allowed, the process proceeds to stop routine displays the current focal length f ₀ (# 1287~ # 12
89).

In the case of a varifocal zoom lens, since the photographing distance changes due to zooming, the EXZM
(Zoom during exposure) is prohibited, but if the core image is in focus, it will not be a big problem. By further zooming, the image will be blurred and the special effect will be lost. There is also the advantage of being able to aim. Therefore, in this case, the program is changed as follows. That is, regardless of whether the zoom lens is a vari-focal zoom lens or a non-varifocal zoom lens, first, an offset routine (SUB13)
Before executing the above, if the lens is EXZM (zoom during exposure), the lens is zoomed to the wide end, and then AE calculation and AF are performed to focus on the image to be the core at the wide end. In the exposure control routine shown in FIGS. 37 and 38, # 534 to # 548 (zoom to wide end) are omitted, and in # 558, whether or not the lens is a type I lens is determined. The process proceeds to step # 566, otherwise to step # 559, and the same operation is performed thereafter.
Also on the lens side, steps # 1265- # 1282 (zoom to wide end) in the EXZM routine shown in FIGS. 72 and 73 are omitted, and EXZM during exposure (zoom during exposure)
Then, the operation from # 1283 is performed. Also,
In the embodiment, the display of EXZM is erased in the case of EXZM (zoom during exposure) using a type III lens (see # 1125, # 1128 in FIG. 64 and # 1312, # 1315 in FIG. 74). This operation is also unnecessary.

Next, data is sent from the lens to the body.
FIG. 74 and FIG. 75 show the lens data output routine for
explain. In this routine, the data pointer DPO
The operation is divided according to the content. First, the data pointer D
Enter PO and DPO = 16 _HIs determined (# 1
301, # 1302). DPO = 16_HThen, the first
Transmit 6 bytes of lens data from dress AD1
Is that it is being instructed by the body
The aperture value Avo and the contents of the mode buffer MOB
The minimum aperture value Avmax, aperture value deviation value △ Av,
Conversion coefficient K_LAnd NDC, current focal length f₀Output
(# 1303 to # 1308). And port P34
Is “High” when the lens select signal CSL input to the
Wait for the return to the level and end the communication (# 130
9). Next, whether the power switch PWS is ON or not
Is determined (# 1310). Power switch PWS is O
If not N, the display is erased and the current focal length f₀The table
And the process proceeds to the stop routine with the interrupt permitted (# 13)
11, # 1319, # 1320). Power at # 1310
If the switch PWS is ON, EXZM (zoom during exposure)
Is determined (# 1312). Be EXZM
If the lens mode LMO₁Is erased (# 131)
5). If not EXZM, PZOOM (Power Zoo
Is determined (# 1313). With power zoom
If there is no lens mode LMO₁Is deleted (# 13
15), lens mode LMO for power zoom₁of
Display is performed (# 1314). And lens switch model
LEAD LMO_TwoSubroutine for displaying (SUB4
Execute 1). Next, determine if the body is inactive
A determination is made (# 1316). If the body is working,
The shadow distance D is displayed, and the flow shifts to # 1319 (# 131).
8). If the body is not operated in # 1316, # 131
At 7, a display indicating that the lens is at the ∞ position is displayed.
After executing the zoom subroutine (SUB39),
It moves to 1319.

At step # 1302, the data pointer is set to DPO = 1.
Otherwise 6 _H, determines whether the DPO = 81 _H in # 1325. If DPO = 81 _H, so that it should enter the lens data of 1 byte from the eighth address AD8 (i.e. offset amount N _L) will have been instructed from the body, correcting the position of the focusing lens The data of the offset amount _NL for performing the calculation is calculated from the current focal length f ₀ , the focal length saved in the register f ₀ ′, and the photographing distance D based on a formula described later, and the data is sent to the body. (# 1326, # 1327). The lens select signal CSL, which is input to the port P ₃₄
Waits for the camera to return to the “High” level, displays the shooting distance D, and proceeds to # 1319 (# 1328, # 1)
329).

At step # 1325, the data pointer is set to DPO = 8.
If it is not 1 _H , it is determined at # 1331 whether or not DPO = 54 _H. If DPO = 54 _H, so that it should enter the 4 bytes of lens data from the fifth address AD5 will have been instructed from the body AZP
(Normal conversion program)
DC (f _A ), focal length f _A , photographing magnification β, and offset amount _NL are output (# 1312- # 1336). Then, the lens select signal C input to the port P ₃₄
Waiting for the SL or "High" back to level, as allowed an interrupt to the interrupt terminal INT _1, the process proceeds to AZP routine.

In the AZP routine, zooming is performed on the calculated focal length f _A. First, it is determined whether or not the current focal length f ₀ matches the calculated focal length f _A (# 1339). If f ₀ = f _A , the photographing distance D is displayed in # 1346, and the flow shifts to # 1319. # 1339
If f ₀ ≠ f _A , the power supply of the lens high voltage V _LEH (P ₃₉ = “High”) is waited, and the zoom motor MO ₃
Is driven toward the calculated focal length f _A (# 134
1). Then, until the current focal length f ₀ reaches the calculated focal length f _A , or until it is determined that the power supply of the high voltage V _LEH for the lens is stopped (P ₃₉ = “Low”), # 134 is reached.
2, loop # 1343. When powered off of the high voltage V _LEH lens is determined in # 1343, for driving the AF motor MO _2, a zoom motor M in # 1344
O ₃ is stopped, and the flow returns to # 1340 to return to the high voltage V for the lens.
Wait for _LEH power supply. If f ₀ = f _A in # 1342, the zoom motor MO ₃ is stopped in # 1345, and # 1
At 346, the photographing distance D is displayed, and the flow shifts to # 1319.

In step # 1331, the data point is DPO = 5.
If it is not 4 _H , it is determined whether or not DPO = 13 _H in # 1351. If DPO = 13 _H , it is instructed that three bytes of lens data should be transmitted to the body from the first address AD1, so the open aperture value Avo, the minimum aperture value Avmax, and the aperture value deviation amount △ A
v is sent to the body (# 1352 to # 1354). Then, the control waits until the port P ₃₄ to which the lens select signal CSL from the body is input becomes the “High” level, enables the interrupt, and shifts to the stop routine (# 1355, #
1356). Incidentally, unless DPO = 13 _H in # 1351, the process proceeds to stop routine interrupts as Y in # 1356.

In the above description, the power supply on the lens side (particularly the power supply for the zoom motor MO ₃ ) is supplied from the power supply battery EB of the body. However, it is conceivable to provide a power supply battery also on the lens side. . In this case, regardless of the state of the battery check, it is possible to move the AF motor MO ₂ and the zoom motor MO ₃ simultaneously. Therefore, it is necessary to alternately move the motors MO ₂ and MO ₃ in the AZP routine (# 1340, # 1341, # 1343, #
1344), and AZP (auto zoom program) can be performed at high speed. Further, at the time of power zooming, it is not necessary to activate the body from the lens and receive power supply from the body before performing zooming. Even in this case, if it is detected that the AF is being performed (during the focus detection operation or the focus adjustment operation), it is desirable to prohibit the power zoom to maintain the AF accuracy.

[0183] Next, shown will be described the subroutine for displaying the lens switch mode LMO ₂ in Figure 76. #
In step 1361, whether or not a WIM (wide mode) is set is determined in step # 13.
At 62, it is determined whether or not an MLM (imaging magnification lock mode) is set. If it is WIM or MLM, # 1364
Deletes the display of the lens switch mode LMO ₂ and returns. If it is neither WIM nor MLM, # 1363
In and view of the lens switch mode LMO _2, to return.

Thus, the description of the flowchart showing the operation of the microcomputer CPUL in the lens is ended, and the description of the flowchart showing the operation of the microcomputer CPUF in the flash follows. 77 and 78 show the microcomputer CP in the flash.
It is a flowchart which shows operation | movement of UF. When flash main switch FMS is changed from or OFF from ON to OFF to ON, the interrupt terminal I from the pulse generator PG ₃
A “Low” level pulse is input to NTα, and FIG.
An interrupt routine after # 1501 is executed. In this interrupt routine, it is first determined that the interrupt is permitted and whether or not the flash main switch FMS is ON (# 1501,
# 1502). Flash main switch FMS or ON
Then, the flash enable signal FLEN is set to “Low” level to enable light emission, and the booster circuit DDF in the flash is operated until charging is completed (# 1503 to # 1503).
1506). Flash main switch F in # 1502
If MS is OFF, light emission is disabled (FLEN = “Hig”
h ″), the boosting is stopped, the display is turned off, and the operation is stopped (# 1510 to # 1512).

On the other hand, when the flash select signal CSF sent from the body goes to a "Low" level, an interrupt routine (# 1515 and thereafter in FIG. 77) is executed by the interrupt terminal INTβ. In this interrupt routine, it is first determined whether or not the flash main switch FMS is ON (#
515). If the flash main switch FMS is not ON, the interrupt is permitted in # 1509 and the process proceeds to # 1510. If the flash main switch FMS is ON, it is determined whether or not the body is in a flash data input mode (# 1516). More specifically, if the flash select signal CSF is at "High" level at this time, the body is determined to be in the flash data input mode, and the flash data FLD is # 1517 to # 1531.
To the body. Flash data FLD is 3 bits b
₂ , b ₁ , and b ₀ , and the i-th (i = 0 to 2) data is hereinafter referred to as FLDi. First, in # 1517, it is determined whether or not charging is completed. If charging is completed, charging completion is displayed, and the flash data FLD contains data 0 indicating that charging has been completed using the dedicated flash.
1 * is set (# 1518, # 1519). here,
FLD ₂ = 0 indicates a dedicated flash, and FLD ₂
D ₁ = 1 indicates that charging has been completed. If the charging is not completed in # 1517, the display of the charging completion is erased, and data 00 * indicating that charging is not completed by the dedicated flash is set in the flash data FLD (# 1520, # 1521). Here, FLD ₁ = 0 indicates that charging is not completed. Next, # 152
In step 5, the signal FDC is set. The signal FDC is “Low”
If it is at the level, light control OK is displayed, and data 0 * 0 indicating light control OK is set in the flash data FLD by the dedicated flash (# 1526, # 1527). Here, FLD ₀ = 0 indicates that dimming is OK. Also,
If the signal FLD is not at the "Low" level in # 1525, the display of dimming OK is erased and the flash data FLD
Is set to data 0 * 1 indicating that the light control is not OK with the dedicated flash (# 1528, # 1529). Here, FLD ₀ = 1 indicates that dimming is not OK. The flash data FLD set as described above is # 153
At 1 the flash status data is sent to the body. In # 1532, the light emission amount data Ivz based on the irradiation range is sent to the body, and the flow shifts to # 1551.

On the other hand, if the flash select signal CSF is at "Low" level in # 1516, it is determined that the body is not in the flash data input mode but in the body data output mode. The respective data of the photographing distance Dv and the focal length f are input to the flash (# 1541 to # 1544). Then, after waiting for the flash select signal CSF to reach the “High” level, the flash irradiation range is changed to the focal length f.
Is controlled by the motor MO ₅ and the code plate ZPC (#
1545, # 1546). In addition, display the irradiation range,
Aperture value Av, film sensitivity Sv, and light emission amount data Ivz
Is calculated and displayed, and the photographing distance D is displayed (# 1547 to # 1549). afterwards,
The process moves to # 1551.

At step # 1551, the timer is reset and started. Next, the flash timer register TI
FR is set to a predetermined value P, and interruption is enabled (# 155)
2, # 1553). Then, the voltage is increased until the charging is completed, and after the charging is completed, the charging completion display is performed (# 1554 to # 1554).
# 1562). During this time, if there is an interrupt due to the interrupt terminal INTβ, the above operation is performed again.

Lens select signal CSF from body
Becomes "Low" level, a timer interrupt is applied.
This interrupt routine will be described with reference to FIG. Signal FDC
Is "Low" level, dimming OK is displayed, and "Hig" is displayed.
If the level is "h", the display of light control OK is deleted (# 1570).
~ # 1572). Then, count down the contents of the flash timer register TIFR by one, and
It is determined whether or not = 0 (# 1573, # 1574). T
If IFR ≠ 0, the timer is reset / started again, the interrupt is enabled, and the boosting operation (# 1554- # 155) is performed.
Return to the routine of (6) (# 1578, # 157)
9). A predetermined time after the communication with the body is completed (for example, 3
Seconds), TIFR = 0 at # 1574,
The boosting is stopped, the display is turned off, the interruption is permitted, and the operation is terminated (# 1575 to # 1577).

FIG. 80 shows the microcomputer CPUL in the lens and the body.
Of the signal transmission terminal between the microcomputers
Show. In this example, the lens select signal CSL is “Lo”
When it becomes w "level, microcomputer CPUL in the lens is activated
Is done. Also, the buffer BF ₄₀And BF₅₀Is activated
And the read / write signal R / W is the microcomputer CP in the lens.
Sent to UL. When the read / write signal R / W is "Lo"
When the w ”level is reached, the buffer BF₄₁And BF₅₁Is activated
The microcomputer CPUB in the body
Data is sent to CPUL. Read / write signal R
/ W becomes “High” level, the buffer BF₅₂When
BF₄₂Is activated and the microcomputer CPUL in the lens
Data is sent to the microcomputer CPUB in the body. lens
When the select signal CSL goes to the “High” level,
Buffa BF₄₀And BF₅₀Is in the high output impedance state.
Buffer BF₄₃And BF₅₃Is activated. Accordingly
And port P₈₁Becomes "Low" level, the buffer
BF₅₃, Terminal J₉₁, J₈₁, Buffer BF₄₃, And game
To AN₁Via the interrupt terminal INT_AInterrupt signal is
Then, the microcomputer CPUB in the body is activated. This method
However, the number of terminals between the lens and the body is as shown in FIGS.
It is the same as the formula. Note that all buffers shown in the drawing
Is a tri-state buffer.

FIGS. 81 to 83 show the first to third auto switches.
Zoom program AZP₁~ AZP _ThreeThe program line
Is shown. In the figure, the vertical axis indicates the focal length f (mm), and the horizontal axis indicates
The axis indicates the photographing distance D (m). f_TIs the focal length at the telephoto end
Release, f_WIs the focal length at the wide end. D_TIs at the tele end
Shooting distance, D_WIs the shooting distance at the wide end. β_TIs
End magnification, β_WIs the shooting magnification at the wide end. Less than
Hereinafter, each program line will be described.

First, the first auto zoom program AZ
As shown in FIG. 81, the program line of P ₁ has D ≦
F _A = f _W at the time of D _W, when D ≧ D _T is f _A =
f _T , and when D _W <D <D _T , the point (D _W ,
f _W ) and a point (D _T , f _T ). That is,
In this program line, the point (D _W , f _W ) and the point (D _T , f _T ) are connected by a straight line having a constant gradient, and the photographing magnification β _T at the telephoto end photographing distance D _T is taken at the wide end. It is smaller than the photographing magnification β _{W at the} distance D _W. The feature of the description is that the person is photographed in an appropriate size together with the background. However, when the shooting distance D is long, the image is slightly smaller, and when the shooting distance D is close, the image is slightly larger and appropriate.

Next, the second auto zoom program AZ
Program lines P _2, as indicated by the bold line in FIG. 82, f _A = f _W at the time of D ≦ D _1, next to f _A = f _T when the D ≧ D _4, when D ₁ <D ≦ D ₂ is Point (D
_1, f _W) and a straight line passing through the point _{(D 2, f 2),} D 2 <D ≦
F _A = D × β ₂₃ at the time of _{D 3 (β 1> β 23} > β 4),
When D ₃ <D ≦ D _4, a straight line passes through the point (D ₃ , f ₃ ) and the point (D ₄ , f _T ). In this program line, as compared with the first program line (indicated by a thin line), the photographing magnification β is large as a whole, and becomes convex above the first program line. The descriptive feature is that the person is photographed in an appropriate size, and the person (or the main subject) is emphasized by blurring the background.

Finally, the third auto zoom program A
ZP_Three83 is indicated by a bold line in FIG.
Where D ≦ D₁Then f_A= F_W, D ≧ D_FourWhen
Is f _A= F_TAnd D₁<D ≦ D_TwoWhen the point (D
₁, F_W) And point (D_Two, F_Two), D_Two<D ≦
D_ThreeThen f_A= D × β_{twenty three}(Β₁> Β_{twenty three}> Β_Four),
And D_Three<D ≦ D_FourWhen the point (D_Three, F_Three) And point
(D_Four, F_T). This program line
In the first program line (shown by the thin line)
The photographing magnification β is small overall, and the first program
It is convex below the M-line. And the characteristics of the description
The sign is that you can take a snapshot with a sense of depth as much as possible
is there.

FIGS. 84 and 85 are diagrams for explaining a method of calculating the offset amount _NL for driving the focusing lens in the offset routine (SUB13) in the case of a varifocal lens. In the figure, I to IV indicate lenses of the first to fourth groups. The horizontal direction indicates the optical axis direction of the lens, and the vertical direction indicates a change in the focal length due to zooming. The upper horizontal line shows the arrangement of each lens at the wide end, and the lower horizontal line shows the arrangement of each lens at the tele end. At an arbitrary zoom position between the wide end and the tele end, the lenses move in conjunction with each other such that the lenses are arranged on the intersection of the locus indicated by the curve and the horizontal line. The focusing lens is a fourth group lens IV, and the offset amount _NL is determined so that the lens IV falls within a range shown by oblique lines.

In general, the photographing distance is D, the lens extension amount from the ∞ position to the photographing distance D is d, the change in the extension amount d is Δd, the defocus amount is ΔL, and Δd / ΔL = K _0.
Then, d ≒ f ² · K ₀ / D... Further, the rotation number of the AF coupler from the position ∞ to the photographing distance D is N _L , and the change amount of the rotation number is △ N _L , LN _L /
If ΔL = K _L , then N _L ≒ f ² · K _L / D. Now, when the focal length of f = f _1, the photographing distance D
= D ₁ , and K _L = K _L1 and N _L = N _L1 . Focal length from this state f = f _2, when zooming up state imaging distance is _{D = D 2, K L =} K L2, N L = N L2, focusing lens the extent possible focus detection offset amount N _L for moving the is a lens shown in FIG. ^{_{85, N L = f 2 2 ·}} K L2 / D-f 1 2 · K L1 / D = f 2 2 · K L2 / D-N L1 ... Further, in the lens shown in FIG. ^{_{84, N L = f 2 2 ·}} K L2 / D-N L1 + {Nz (f 2) -Nz (f 1)} ... become. Here, Nz (f) is a lens moving amount required when the ∞ position is changed by zooming,
There are various functions depending on the optical design. In the above equation, the conversion coefficient K _L has a one-to-one correspondence with the focal length f. However, since the correspondence is different for each lens, it is stored as a table in a memory in the lens. As in the lens of FIG. 85, those ∞ position zoom lens for focusing in the rear group does not move, as well as the entire feeding zoom, since transform coefficients K _L is not changed by zooming, wherein the N _L = ( f _{² 2} -f _{1 2)} · may be the K _L / D.

Although the description of the embodiments has been completed, the present invention can be embodied in many forms without departing from the essential characteristics thereof. Is not restrictive. Further, the technical scope of the present invention covers all modifications within the requirements of the claims or equivalents to the requirements.

For example, in the above-mentioned embodiment, the case of the interchangeable lens type camera has been exemplified. However, the inter-exposure zoom can be applied to a camera in which a zoom lens is fixedly mounted. Further, the setting of the during-exposure zoom has been described by way of an example of mounting an IC card. Although the example of the focal play is described as the shutter, a lens shutter that is also used as an aperture may be used. In this case, since the entire surface of the film is exposed after the shutter is opened, in the case of natural light, zooming is performed a predetermined time after the shutter is opened, thereby shortening the limited exposure time compared to the focal plane shutter. Can be. In flash photography, zooming may be performed after the flash is fired at the time of the aperture opening determined by the flashmatic operation.

Further, in the embodiment, an example is shown in which the zoom is set to the wide end first and zooming is performed toward the tele end, but the tele end is set first for another effect. Alternatively, it may be moved to the wide end during the exposure, or both may be switched. Even if the telephoto end is set first and the exposure time at the wide end is lengthened last, a photograph having the same effect as in the embodiment can be obtained. Further, the zooming speed may be obtained from the exposure time and the zoom range, and the zooming may be performed at this speed. The zoom range is determined as the entire zoom area of the zoom lens or a range set by the photographer.

[0199]

According to the present invention, since the information on the focal length at which the total length of the lens becomes the shortest is stored for each lens, the main switch of the camera is set to the inoperative position regardless of the lens used. When switched, the lens is driven so that the overall length of the lens becomes the shortest. Therefore, when the camera is not used, the lens becomes compact, which is convenient for carrying and storing.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of the present invention.

FIG. 2 is a perspective view of a camera body to which the present invention is applied.

FIG. 3 is a perspective view of an interchangeable lens to which the present invention is applied.

FIG. 4 is a circuit diagram of a camera body to which the present invention is applied.

FIG. 5 is a circuit diagram of a camera body to which the present invention is applied.

FIG. 6 is a circuit diagram of a camera body to which the present invention is applied.

FIG. 7 is a circuit diagram of a camera body to which the present invention is applied.

FIG. 8 is a circuit diagram of an interchangeable lens to which the present invention is applied.

FIG. 9 is a circuit diagram of a flash to which the present invention is applied.

FIG. 10 is a flowchart for explaining the operation of the present invention.

FIG. 11 is a flowchart for explaining the operation of the present invention.

FIG. 12 is a flowchart for explaining the operation of the present invention.

FIG. 13 is a flowchart for explaining the operation of the present invention.

FIG. 14 is a flowchart for explaining the operation of the present invention.

FIG. 15 is a flowchart for explaining the operation of the present invention.

FIG. 16 is a flowchart for explaining the operation of the present invention.

FIG. 17 is a flowchart for explaining the operation of the present invention.

FIG. 18 is a flowchart for explaining the operation of the present invention.

FIG. 19 is a flowchart for explaining the operation of the present invention.

FIG. 20 is a flowchart for explaining the operation of the present invention.

FIG. 21 is a flowchart for explaining the operation of the present invention.

FIG. 22 is a flowchart for explaining the operation of the present invention.

FIG. 23 is a flowchart for explaining the operation of the present invention.

FIG. 24 is a flowchart for explaining the operation of the present invention.

FIG. 25 is a flowchart for explaining the operation of the present invention.

FIG. 26 is a flowchart for explaining the operation of the present invention.

FIG. 27 is a flowchart for explaining the operation of the present invention.

FIG. 28 is a flowchart for explaining the operation of the present invention.

FIG. 29 is a flowchart for explaining the operation of the present invention.

FIG. 30 is a flowchart for explaining the operation of the present invention.

FIG. 31 is a flowchart for explaining the operation of the present invention.

FIG. 32 is a flowchart for explaining the operation of the present invention.

FIG. 33 is a flowchart for explaining the operation of the present invention.

FIG. 34 is a flowchart for explaining the operation of the present invention.

FIG. 35 is a flowchart for explaining the operation of the present invention.

FIG. 36 is a flowchart for explaining the operation of the present invention.

FIG. 37 is a flowchart for explaining the operation of the present invention.

FIG. 38 is a flowchart for explaining the operation of the present invention.

FIG. 39 is a flowchart for explaining the operation of the present invention.

FIG. 40 is a flowchart for explaining the operation of the present invention.

FIG. 41 is a flowchart for explaining the operation of the present invention.

FIG. 42 is a flowchart for explaining the operation of the present invention.

FIG. 43 is a flowchart for explaining the operation of the present invention.

FIG. 44 is a flowchart for explaining the operation of the present invention.

FIG. 45 is a flowchart for explaining the operation of the present invention.

FIG. 46 is a flowchart for explaining the operation of the present invention.

FIG. 47 is a flowchart for explaining the operation of the present invention.

FIG. 48 is a flowchart for explaining the operation of the present invention.

FIG. 49 is a flowchart for explaining the operation of the present invention.

FIG. 50 is a flowchart for explaining the operation of the present invention.

FIG. 51 is a flowchart for explaining the operation of the present invention.

FIG. 52 is a flowchart for explaining the operation of the present invention.

FIG. 53 is a flowchart for explaining the operation of the present invention.

FIG. 54 is a flowchart for explaining the operation of the present invention.

FIG. 55 is a flowchart for explaining the operation of the present invention.

FIG. 56 is a flowchart for explaining the operation of the present invention.

FIG. 57 is a flowchart for explaining the operation of the present invention.

FIG. 58 is a flowchart for explaining the operation of the present invention.

FIG. 59 is a flowchart for explaining the operation of the present invention.

FIG. 60 is a flowchart for explaining the operation of the present invention.

FIG. 61 is a flowchart for explaining the operation of the present invention.

FIG. 62 is a flowchart for explaining the operation of the present invention.

FIG. 63 is a flowchart for explaining the operation of the present invention.

FIG. 64 is a flowchart for explaining the operation of the present invention.

FIG. 65 is a flowchart for explaining the operation of the present invention.

FIG. 66 is a flowchart for explaining the operation of the present invention.

FIG. 67 is a flowchart for explaining the operation of the present invention.

FIG. 68 is a flowchart for explaining the operation of the present invention.

FIG. 69 is a flowchart for explaining the operation of the present invention.

FIG. 70 is a flowchart for explaining the operation of the present invention.

FIG. 71 is a flowchart for explaining the operation of the present invention.

FIG. 72 is a flowchart for explaining the operation of the present invention.

FIG. 73 is a flowchart for explaining the operation of the present invention.

FIG. 74 is a flowchart for explaining the operation of the present invention.

FIG. 75 is a flowchart for explaining the operation of the present invention;

FIG. 76 is a flowchart for explaining the operation of the present invention.

FIG. 77 is a flowchart for explaining the operation of the present invention;

FIG. 78 is a flowchart for explaining the operation of the present invention.

FIG. 79 is a flowchart for explaining the operation of the present invention.

FIG. 80 is a circuit diagram of a modified example of a communication circuit between the camera body and the interchangeable lens.

FIG. 81 is an explanatory diagram of an automatic zoom program used in the present invention.

FIG. 82 is an explanatory diagram of an automatic zoom program used in the present invention.

FIG. 83 is an explanatory diagram of an auto-zoom program used in the present invention.

FIG. 84 is an explanatory diagram of the operation of the varifocal lens used in the present invention.

FIG. 85 is an explanatory diagram of the operation of the varifocal lens used in the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 photographing lens 101 main switch 102 driving means 103 determining means 104 control means

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tokuharu Ishida 2-3-13 Azuchicho, Chuo-ku, Osaka-shi Osaka International Building Minolta Co., Ltd. (72) Inventor Hisayuki Masumoto 2-chome Azuchicho, Chuo-ku, Osaka-shi No. 13 Osaka International Building Minolta Co., Ltd. (72) Inventor Sho Saku Tokumaru 2-13-13 Azuchicho, Chuo-ku, Osaka City Osaka International Building Minolta Co., Ltd. (72) Inventor Tsuneyo Yoneta Chuo-ku, Osaka-shi 2-13-13 Azuchicho Osaka International Building Minolta Co., Ltd. (56) References JP-A-63-70834 (JP, A) JP-A-58-125005 (JP, A) (58) Fields investigated ( Int.Cl. ⁶ , DB name) G02B 7/08 G02B 7/10 G03B 5/00 G03B 7/20

Claims (1)

(57) [Claims] 1. An interchangeable lens having a variable focal length, the total length of which changes in accordance with a change in the focal length, and a photographing lens storing information on the focal length when the total length is the shortest, and a camera operation permitted. A main switch for switching between a position for prohibition and a position for prohibition, a driving means for changing the focal length of the taking lens, a determining means for determining whether or not the entire length of the taking lens is the shortest, and a main switch in the operation prohibiting position. A camera comprising a zoom lens, comprising: control means for controlling a driving means so that the total length of the lens becomes the shortest when switched.