JPH0527298A - Exposure controller for camera - Google Patents

Abstract

PURPOSE:To simplify a change in an exposure mode and to easily reflect the intention of a photographer by providing a means changing one exposing factor to one set by the operation of one exposing factor. CONSTITUTION:Two automatic exposure modes of a normal program exposure mode and a hyperprogram exposure mode which can be changed to the automatic exposure mode of exposure factor priority only by the operations of electronic dials 17 and 19, are provided. When the hyperprogram exposure mode is selected, the electronic dials 17 and 19 are rotationally operated, so that shutter speeds or diaphragm values corresponding to their rotationally operating directions have up and down changes, or the change to a shutter speed priority automatic exposure mode or a diaphragm priority automatic exposure mode, is attained. Further, the shutter speed or the diaphragm value is changed by the operations of the electronic dials 17 and 19, after the change to the automatic exposure mode is attained. And a clear button 23 has an on-operation after a forcible change to the automatic exposure mode is attained, to obtain return to an initial hyperprogram exposure mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exposure control device for a camera having a plurality of exposure modes.

[0002]

2. Description of the Related Art Recent cameras have a plurality of exposure modes, and a photographer can select a desired exposure mode from these exposure modes by operating a switch or the like.

However, recently, the number of types of exposure modes has increased, and the number of modes other than the exposure mode such as continuous shooting mode has also increased. For this reason, the mode is generally switched by a combination of a plurality of switches.

However, general photographers rarely switch between a large number of exposure modes and use them frequently. In other words, it uses only a few specific modes. Therefore, the switching by the conventional combination switch operation is complicated and troublesome, and there is a situation in which the mode intended by the photographer cannot be easily set.

Further, in the conventional program exposure mode, the shutter speed and the aperture value are automatically determined in a fixed relationship (combination), and therefore the aperture value or the shutter speed outside this relationship is set by the photographer's intention. I couldn't.

Further, the conventional program shift mode is
In the program exposure mode, the shutter speed and the aperture value are changed at the same time while maintaining a constant relationship by the switch operation, and only one of them cannot be changed.

Therefore, in the conventional camera, when it is desired to change only one of the aperture value and the shutter speed in the program exposure mode, the program exposure mode is switched to the shutter speed priority (EE) automatic exposure mode or the aperture value priority (ES) automatic exposure mode. It had to be switched, and the operation was troublesome.

[0008]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the awareness of the above-mentioned conventional exposure control apparatus having a plurality of exposure modes such as program, shutter speed priority, aperture priority, manual, and valve. It is an object of the present invention to provide an exposure control device that is easy to change and that easily reflects the photographer's intention.

[0009]

SUMMARY OF THE INVENTION In view of the above, the present invention provides a photometric means for photometrically measuring a subject brightness, first and second manual setting means for independently setting a shutter speed and an aperture value as a pair of exposure factors, and the above-mentioned pair. The exposure factor of (1) is automatically set according to the photometric value of the photometric means, and in the program exposure mode, when one of the first or second manual setting means is operated, the one exposure factor of And an exposure factor changing means for changing the exposure factor to the exposure factor set by the above operation.

According to this structure, when the program exposure mode is selected, the shutter speed or the aperture value can be adjusted by operating the single first or second manual setting means without changing the exposure mode. It can be easily changed based on

Further, if the clear switch means for canceling the operation of the first and second manual setting means is provided, the program exposure mode can be easily returned.

According to a fifth aspect of the present invention, the photometric means for photometrically measuring the subject brightness and the first and second manual setting means for independently changing the shutter speed and the aperture value as a pair of exposure factors. And a specific program exposure mode in which the pair of exposure factors are automatically set according to the photometric value of the photometric means, and manual setting of either one of the pair of exposure factors is possible, and the other is the photometric value of the photometric means. The automatic exposure mode automatically set according to, the exposure mode selection means for selectively selecting one from a plurality of exposure modes including the specific program exposure mode and the automatic exposure mode, and the specific program exposure mode When the first or second manual setting means is operated when the shutter speed or the shutter speed corresponding to the operation is selected. And exposure mode forced changing means for forcibly changing the aperture value to the automatic exposure mode priority, to having the having the features.

According to this structure, when the specific program exposure mode is selected, the shutter speed or the aperture value can be changed to the automatic exposure mode by operating the first or second manual setting means.

After the forced change of the exposure mode to either of the automatic exposure modes by operating the first or second manual setting means, the other second or first manual setting means is operated. In such a case, if the configuration is such that the other automatic exposure mode is forcibly changed, it becomes easy to change from the specific program mode to any one of the automatic exposure modes and to the automatic exposure mode.

Further, by providing an operation means for returning to the specific program exposure mode when operated when the specific program exposure mode is forcibly changed to any one of the automatic exposure modes, a specific program can be provided. It is very easy not only to change from the exposure mode to the automatic exposure mode, but also to change it from the automatic exposure mode to the specific program exposure mode.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. FIG. 1 is a top view showing an appearance of an embodiment of a single-lens reflex camera body equipped with an exposure control device of the present invention, FIG. 2 is a rear view showing a DX code reading section of the camera body, and FIG.
[Fig. 3] is a front view of the camera body.

A shutter button 15 is provided on the front portion (subject side) of the upper surface of the grip portion 13 of the camera body 11. A Tv (TV) electronic dial 17 is provided on the rear side (photographer side) of the shutter button 15, and Av (AV) is provided on the rear surface (side face of the photographer) of the grip portion 13.
An electronic dial 19 is provided. The Tv electronic dial 17 and the Av electronic dial 19 are rotary dials that are rotatable in the left-right direction, and the details thereof will be described later, but the rotation thereof allows the shutter speed Tv, the aperture value Av, and the exposure mode to be changed. The electronic dials 17 and 19 constitute a part of the first and second manual setting means or the shutter speed and aperture value manual setting means.

A clear button 23 is provided near the Av electronic dial 19 on the upper rear surface of the camera body 11,
Further, a hold button 25 is provided on the right side of the clear button 23. The clear button 23 constitutes a part of the clear switch means.

The electronic dials 17 and 19, the clear button 23, and the hold button 25 described above can be operated by the forefinger or thumb without holding the camera body 11 when the photographer holds the camera body 11 in a normal photographing mode. It is configured to be operable.

On the upper surface of the camera body 11, an exposure correction / ISO lever 27 and an exposure mode / drive lever 29, which are slidable in two opposite directions from the neutral position on the left side of the pentaprism section, and the right side of the pentaprism section. A main switch 31 that is slidable in three positions is provided.

The cartridge storage room 33 of the camera body 11
Inside, DX pin DX which touches the DX code printed on the surface of the film cartridge and reads the data.
1 to DX6 are provided. These DX pins DX1 to DX
6 contacts the portion of the DX code representing the ISO sensitivity Sv to read the data.

Further, the mount 35 of the camera body 11 has a group of mount pins (CONT, RES / Fmin3, SI / Fmin2, Fmax1, A / M, Fmax) for communicating with the taking lens.
2, ■ SCK ■ / Fmin1) are provided. Through the electrical connection between each of these pins and the corresponding mount pin provided on the mount (not shown) of the taking lens, the camera body 11 can detect the minimum F number Fmin (open F number) and the maximum F number from the taking lens. Lens data such as Fmax is read, and further communication with a control means (ROM or CPU) mounted on the taking lens is performed to read lens data such as focal length f and lens type. In the present specification, symbols, signs, etc. sandwiched by "■" and "■" mean so-called active low or inverted signals.

Next, the outline of the circuit configuration of the control system of this camera system will be described with reference to FIG. The camera body 11 includes a CPU 41 and an IP as control means.
Equipped with U43. The CPU 41 calculates the exposure factor (aperture value Av and shutter speed Tv), performs a decision function, an exposure control function, a calculation related to automatic focus adjustment, a basic photographing function such as a control function, a mode forced changing unit, and an exposure mode return. It also has a function as a means, a priority exposure factor changing means, an exposure mode compulsory changing means within a specific exposure mode, a limit value setting means, an exposure value holding means, a manual shift means, and a set mode switching means.

On the other hand, the IPU 43 has a shutter button 1
5, input interface of switches such as Tv electronic dial 17, Av electronic dial 19, various exposure mode setting means, display-related control means, various exposure mode setting means, and CPU 41 power on (power hold) and off It also has a function as a regulator, a set mode, a function as a memory unit for storing the shutter speed Tv and the like. In addition, IPU43
, Switch information input judgment, various mode display, CPU4
1, a ROM 43a for storing programs for communicating with the camera 1 and with the taking lens, various set modes,
A RAM 43b for temporarily storing various data such as a shutter speed and an aperture value, and an E ² PROM 43c for retaining the number of films, ISO sensitivity and the like even after the power of the camera is turned off are provided.

The IPU 43 has a photographing lens 65.
Lens communication is executed between the camera and the camera to input lens information such as the maximum F-number Fmax, the minimum F-number Fmin and the focal length f from the photographing lens 65, and further exchange data relating to photographing via the CPU 41 and the bus. And controls various operations and displays relating to shooting.

The output of the photometric element (light receiving element) 45 is logarithmically compressed by the operational amplifier 47 and the diode D1, amplified by the amplifier 49, and digital value (B _V , BV) corresponding to the apex value by the AD converter 51. Is converted to CP from port P30 to P37
Input to U41.

A diaphragm volume 53 is further connected to the AD converter 51. Aperture volume 53
Cooperates with an aperture ring (not shown) of the taking lens 65 and outputs an aperture value according to the rotational position of the aperture ring as an aperture voltage. This diaphragm voltage is converted into a digital value corresponding to the diaphragm value Av by the AD converter 51, and is input to the CPU 41 from the ports P30 to P37.

The CPU 41 operates the AD converter 51 at a predetermined time to input the levels of the ports P30 to 37, reads the subject brightness signal and the aperture value signal set by the taking lens 65, and converts them into corresponding apex values. To do. The port P40 is an input switching control port for the logarithmic compression voltage amplified by the amplifier 49 and the diaphragm voltage by the diaphragm potentiometer 53.

DX is connected to the ports P10 to P14 of the CPU 41.
Pins DX2 to DX6 are connected. The CPU 41 checks the levels of these ports P10 to P14 at a predetermined time and reads the ISO sensitivity Sv (SV). And the CPU 41
Stores the input data such as the aperture value Av, the subject brightness Bv, and the ISO sensitivity Sv in a predetermined address of the RAM 41b.

The wind motor 55 winds and rewinds the film, and the mirror motor 57 moves the mirror up and down. The operations of the motors 55 and 57 are controlled by the CPU 41 via the motor drive circuit 59.

The release magnet RL releases the lock of the mechanical shutter lock mechanism to start the release operation,
The front curtain magnet ES1 and the rear curtain magnet ES2 lock and release the shutter mechanism (shutter curtain) from which the mechanical locking mechanism has been removed to control the travel of the shutter curtain, and the aperture magnet EE controls the aperture of the shooting lens. Stop the squeezing operation of the squeezing mechanism. Turn on these magnets
/ OFF is controlled by the CPU 41 via the magnet drive circuit 61.

The EE pulse counter 63, after the release,
E linked with the focusing mechanism linked to the mirror up operation
An E pulse is generated and output to the port PDD of the CPU 41. The CPU 41 counts this change in the port PDD level, and when the count value reaches a value corresponding to the set aperture value Av, turns on the aperture magnet EE via the magnet drive circuit 61 to stop the aperture mechanism. , Hold the aperture at its aperture value Av.

Further, mount pins (A / M, CONT, RES / Fmin3, SI / Fmin2, Fma) are attached to the ports PL0 to PL6 of the IPU 43.
x1, Fmax2, (1) SCK (/ Fmin1) are electrically connected to the taking lens 65 (memory means or control means thereof) via these mount pin groups. IPU4
3 is a taking lens 6 through these ports PL0 to PL6.
The lens data such as the open F number Fmin, the maximum F number Fmax, and the focal length f is read by communicating with the camera.

Further, the taking lens 65 is provided with a lens auto / manual switch 67 which is interlocked with the aperture ring 12 and which discriminates whether the aperture is automatic or manual. The lens auto / manual switch 67 is connected to the input port PL0 of the IPU 43 via the mount pin A / M. The IPU 43 inputs the level of the port PL0 to know whether it is lens auto or lens manual. Note that lens auto is an automatic aperture that is stopped down by the aperture mechanism of the camera body up to the aperture value set on the camera body, and lens manual is the manual aperture that is set on the shooting lens side. That is. In the description of this embodiment, the lens auto is also called a "body set".

Input ports PC0 to PC2, PB0 of the IPU 43
The main switch SWMAIN, the photometric switch SWS, the release switch SWR, the exposure mode switch SWMODE, the drive switch SWDRIVE, the exposure correction switch SW ± EF, the ISO sensitivity setting switch SWISO,
Clear switch SWCL and hold switch SWHOLD
Are connected.

The main switch SWMAIN is interlocked with the main switch lever 31, and the photometric switch SWS and the release switch SWR are normally open switches interlocked with the shutter button 15. When the shutter button 15 is half-pressed, the photometric switch SWS is turned on. The release switch SWR is turned on when the switch is fully pressed. The exposure mode switch SWMODE and the drive switch SWDRIVE are linked with the exposure mode / drive lever 29, and the exposure compensation switch SW ± EF and IS
O Sensitivity setting switch SWISO is exposure compensation / ISO lever 2
Works with 7. Clear switch SWCL is clear button 2
3 and hold switch SWHOLD hold button 25
It is a normally open switch that works together with.

The IPU 43 knows the ON / OFF state of each switch SW by inputting the level of each input port PC, PB, and executes the processing according to that state. IPU4
A Tv electronic dial 17 is connected to the pair of three input ports PA0 and PA1, and an Av electronic dial 19 is connected to the other pair of input ports PA2 and PA3. The Tv electronic dial 17 and the Av electronic dial 19 have known click stop rotation structures. That is, for example, at the click stop position, the pair of ports PA0 and PA1 are in a floating state, and from this position, the electronic dials 17 and 19 are connected.
When is rotated to the left or right, one of the pair of ports drops to “L” level first, then both drop to “L” level, and then “L” level first, depending on the direction of rotation. The structure that returns to the floating state first falls. Since the order of changing the levels of these ports PA0, PA1 or PA2, PA3 differs depending on the rotation direction, the IPU 43
The direction of rotation is identified by the order of this change.

The control port group PLCD of the IPU 43 has L
CD display panel 69 and viewfinder display member 71
Are connected. This LCD display panel 69 is an IP
Under the control of U43, the exposure mode, the shutter speed Tv, the aperture value Av, information relating to shooting such as the number of shots, the drive mode, and various conditions (ISO sensitivity information, exposure correction ± EF information, etc.) are displayed. The in-viewfinder display member 71 includes display elements 71a and 71b for identifying the shutter speed Tv, aperture value Av, under, over, and proper exposure value, and an element 71c for indicating that the memory is locked.

The above is the main circuit configuration of the camera system. Next, the operation of the present invention will be described in more detail with reference to the flowcharts. Note that the shutter speed Tv, aperture value Av, subject brightness Bv, and other values used in the following calculation processing are all values for apex calculation.

"Main Processing of CPU" First, the CPU 41
The main operation of will be described with reference to the flowchart shown in FIG. This operation is executed by the CPU 41 based on the program stored in the ROM 41a.

When the photometric switch SWS is turned on while the main switch SWMAIN is turned on, power is supplied to the CPU 41, and this flow chart is entered. CPU41
First initializes each port P in step (hereinafter abbreviated as “S”) 11, and further R in S12.
Initialize AM41b. Then, the DX code (ISO sensitivity Sv), the subject brightness Bv and the aperture value Av are input (S13, S14, S15).

Next, the CPU 41 communicates with the IPU 43 and receives data such as the set photographing exposure mode and exposure factor from the IPU 43 (S16). Then, the CPU 41 calculates the exposure factor by executing the exposure calculation according to the rule of the selected photographing exposure mode based on the ISO sensitivity Sv, the subject brightness Bv, etc. (S18). Then C
The PU 41 executes communication with the IPU 43 to execute S1.
Exposure factor (shutter speed T
v and aperture value data is sent to the IPU 43 (S1
9).

When the exposure factor is obtained, the process proceeds to S20 to check whether or not the release switch SWR is ON, and when it is ON, the release process (exposure, exposure,
(Processing such as film winding) is executed (S21), and when it is off, the process returns to S13, and while the power is held, the processes of S13 to S20 are repeated.

"Communication processing with IPU" The CPU 41
Communication is performed with the PU 43 in order to exchange various data. The communication will be described with reference to the timing chart shown in FIG. 6 and the command example shown in Table 1.
Although not shown, the CPU 41 and the IPU 43 respectively have a CE terminal, a READY terminal, a ■ SCK ■ terminal, and a DA.
It has a TA terminal to which these corresponding terminals are respectively connected.

[Table 1]

First, the CPU 41 raises the level of the terminal CE to notify the IPU 43 that communication will be performed. I
When the PU 43 monitors that the terminal CE has changed to the "H" level, the PU 43 lowers and then raises the level of the READY terminal to notify the CPU 41 that the interrupt is permitted. When the CPU 41 monitors the interrupt permission,
The clock is output to the K pin and the command is output to the DATA pin.

When the reception of the command is completed, the IPU 43 causes the READY terminal to fall and rise to notify the CPU 41 that the reception is completed. And the CPU 41
The data corresponding to the received command is output to the DATA terminal or the data is received from the CPU 41 in synchronism with the clock signal sent from the SCK terminal.

When the transmission and reception of the required data are completed by the above communication processing, the IPU 43 lowers the READY terminal level. CPU41 which received this is CE
The terminal level is lowered and CPU communication is terminated by IPU43.
Let us know. When the IPU 43 monitors that the CE terminal level has dropped, it activates the READY terminal and
PU communication is ended.

"AE Subroutine" Next, the processing of the exposure calculation (AE (automatic exposure mode)) subroutine of S18 will be described with reference to the flowchart shown in FIG.

In this AE process, first, the DX code relating to the ISO speed is converted into an apex value (film speed Sv) (S50). The DX code relating to ISO sensitivity is composed of 5 bits, and in this embodiment, DX pins (DX4, DX3, DX2, DX5, DX) contacting each code are connected.
This is read by 5 bits of 6). Here, the upper 3 bits (DX4, DX3, DX2) of the DX code form an integer part, and the lower 2 bits (DX5, DX6) form a decimal part. Then, the decimal part is, for example, "01", "1".
If it is "1", the apex value is converted to 0/3, if it is "10", the apex value is converted to 1/3, and if it is "00", the apex value is converted to 2/3 and added to the integer part. For example, in the DX code of ISO100, the integer part is "101" and the decimal part is "01".
The integer part has an apex value of 5, and the decimal part has an apex value of 0. Therefore, it is converted into Sv = 5.

Next, the subject brightness Bv is calculated by the formula B _VD = Bv +
7 、 (BVD = BV + 7) is suitable for calculation subject brightness B
Convert to _VD (S51). Further, the film sensitivity Sv and the exposure correction value Xv (XV) are respectively expressed by the formula S _VD = Sv
-1, (SVD = SV-1), X _VD = 4-Xv, (XVD = 4-XV) to calculate the calculation sensitivity S _VD (SVD) and calculation exposure compensation value X _VD (XVD) Convert (S52).

The above processing is performed by the exposure factor for calculation (B _VD , S
To prevent negative values of ( _VD , X _VD ), align the accuracy of each exposure factor to 1/8 Ev steps, and facilitate the apex operation of addition and subtraction without considering the operation accuracy. Is. Since Sv and Xv have an accuracy of 1 / 3Ev, they cannot be accurately converted into 1 / 8Ev steps. Therefore, 1 / 3Ev is rounded to 3 / 8Ev.
Perform processing for approximating v to 2 / 3Ev to 5 / 8Ev.

Then, the photometric correction amount MND based on the variation of the open F number is calculated (S53). This photometric correction amount M
ND is a correction value for correcting the subject brightness Bv in order to keep the exposure amount given to the film surface constant regardless of the change in the open F number (change in lens brightness) due to zooming, for example. This is a unique value. The photometric correction amount MND is input from the photographing lens by IPU-lens communication, which will be described later, and is input from the IPU 43 to S16.
Is transferred to the CPU 41 by the CPU-IPU communication of
It is used in the PU 41.

Next, the brightness for calculation B _VD and the sensitivity for calculation S
_The calculation exposure value L _VD (LVD) is calculated by the following formula based on _VD , the calculation exposure correction value X _VD and the photometric correction amount MND (S54). L _VD = B _VD + S _VD + X _VD + MND With the above processing, preparation for exposure calculation is completed.

Next, the CPU 41 checks which exposure mode is selected and calls an exposure factor calculation subroutine based on the selected exposure mode (S55-
1 to S55-n, S56-1 to S56-n). Then, the aperture value Av and the shutter speed Tv are calculated according to the algorithm of the selected exposure mode, and the process returns. If the exposure mode is not properly set, error processing is performed (S57).

"Error processing" In the error processing of S57,
The calculation shutter speed T _VD and the calculation aperture value A _VD are changed to the calculation maximum shutter speed T _VMAX and the calculation maximum aperture value A _VDMAX , _respectively , and the EE pulse number PNo is set to the maximum value 22.
AVDT, TV set to 5 to convert the aperture value A _VD for calculation and the shutter speed T _VD for calculation to a value for IPU transmission
The DT process (details will be described later) is performed and the process returns (see FIG. 8). The calculation shutter speed T _VD and the calculation aperture value A _VD may be changed to either or both of the calculation minimum shutter speed T _VMIN or the calculation minimum aperture value A _VDMIN .

"Exposure calculation subroutine" In this embodiment,
As an exposure mode, a normal program (Prog) that automatically sets the shutter speed and aperture value based on the photometric results.
ram) Automatic exposure mode, which automatically sets the aperture value from the manually set shutter speed and photometric result Lens-auto shutter speed priority (EE LA) Automatic exposure mode, automatically sets the shutter speed from the manually set aperture value and photometric result Aperture priority to be set (ES LA) Auto exposure mode, Manual (Manual
LA) exposure mode and bulb (Bulb LA) exposure mode, and lens manual aperture priority (ES LM) automatic exposure mode, manual (Manual LM) exposure mode and (Bu
lb LM) with valve exposure mode.

Further, in the present embodiment, a limited program (Program LIMT) automatic exposure mode and a hyper program (Hyper Program) as a specific program exposure mode are used.
It has an automatic exposure mode, a lens shutter hyper shutter speed priority (Hyper EE) automatic exposure mode, and a hyper aperture priority (Hyper ES) automatic exposure mode.

Next, the exposure factor calculation processing in each of the above exposure modes will be described with reference to the flow charts shown in FIGS. "Hyper Program" The hyper program exposure mode of this embodiment is an exposure mode in which the mode can be freely changed between the program mode, the EE automatic exposure mode, and the ES automatic exposure mode. That is, by operating the electronic dials 17 and 19 and the clear button 23, the exposure mode can be freely changed among the three types of specific exposure modes of the hyper program exposure mode, the hyper EE automatic exposure mode, and the hyper ES automatic exposure mode. The processing other than the switching of the exposure mode is the same for the hyper program and the normal program mode.

FIG. 9 is a flowchart relating to the hyper program exposure mode and the normal program exposure mode, and FIG. 10 is its program diagram. Here, first, the relationship between A _VD (AVD) values for operation corresponding to the T _VD (TVD) values and the Av value for operation corresponding to the Tv value, based on the formula of S54, obtained by the following modifications . _{L VD = B VD + S VD} + X VD + MND = (Bv +7) + (Sv -1) + (4-Xv) + MND = (Bv + Sv -Xv + MND) +10 = Ev +10 = Tv + Av +10 = (Tv +5 4 / 8) + (Av + 4 4/8) = T _VD + A _VD Also, here, Ev = Bv + Sv−Xv + MND T _VD = Tv + 5 4/8 (1) A _VD = Av + 4 4/8 …… (2) Therefore, Tv-T according to equations (1) and (2)
The relational expressions of _VD and Av- _AVD are obtained. Here, the constants 5 4/8 and 4 4/8 are added to T _VD and A _VD , respectively, but it is sufficient if these are values that add up to 10. In the present embodiment, it has been decided that the values are almost the same. The Tv -T _VD correspondence table obtained by the above equations in Table 2, showed Av -A _VD correspondence table shown in Table 3.

[Table 2]

[Table 3]

In this program exposure mode, first, S
The optimum calculation shutter speed T _VD is calculated from the calculation exposure value L _VD calculated in 54 and the following program calculation formula, T _VD = 3/8 L _VD +4 6/8, and based on this, the optimum calculation shutter speed T _VD is calculated. Obtain the aperture value A _VD (S61 to S
78). The above equation can be obtained by substituting T _VD = Tv +5 4/8 and A _VD = Av +4 4/8 into Tv = 3/8 Ev +3 (the basic formula of the program line). The optimum calculation shutter speed T _VD and the optimum calculation aperture value A _VD are
Within the shutter capacity range of the camera body 11 (between the maximum shutter speed for calculation T _VDMAX (TVDMAX) and the minimum shutter speed for calculation T _VDMIN (TVDMIN)) and within the range of the photographic lens aperture capacity (the maximum aperture value A for calculation A). _{Between the VDMAX} (AVDMAX) and the minimum aperture value for calculation A _VDMIN (AVDMIN)), the optimum values are held, and the number of EE pulses that holds the aperture of the taking lens at the optimum aperture value Av at the time of release. PN is calculated (S62, S64 to S66, S68, S69, S
72). Note the maximum shutter speed T _VDMAX here means the fastest shutter speed, the minimum diaphragm value A _{VDMI N} means open aperture value.

Maximum and minimum shutter speed T _VMAX (TVMAX),
T _VMIN (TVMIN) is a value specific to the camera body 11,
In this embodiment, T _VMAX = 13 (1/8000 seconds), T _VMAX
VMIN = -5 (30 seconds). Therefore, the maximum and minimum shutter speeds T _VDMAX and T _VDMIN for calculation are calculated by the equation T _VD =
By Tv +5 4/8, T _VDMAX = T _VMAX +5 4/8 = 18 4/8 T _VDMIN = T _VMIN +5 4/8 = 0 4/8 These calculation shutter speeds T
_VDMAX and T _VDMIN are previously stored in the internal ROM 41 of the CPU 41.
It is stored in a and is stored in a predetermined address of the RAM 41b at the time of processing.

Further, the maximum and minimum aperture _values for calculation A _VDMAX ,
A _VDMIN is the maximum and minimum aperture values A _VMAX and A _VMIN , which are peculiar to the taking lens, and the formula, A _VD = Av +4 4/8, A _VDMAX = A _VMAX +4 4/8 A _VDMIN = A _VMIN +4 4 The value represented by / 8. The maximum and minimum aperture values A _VMAX and A _VMIN are input by the lens communication of S35 in the lens communication, and the calculated maximum and minimum aperture _values A _VDMAX and A _VDMIN are the internal RAM 41 of the CPU 41.
It is stored in a predetermined address of b.

When the subject is too bright or too dark, the appropriate exposure factor does not fall on the program line, so the following processing is performed.

(When too bright) Calculation shutter speed T
_{When VD} is larger than the maximum shutter speed T _VDMAX for calculation, the shutter speed T _VD for calculation is changed to the maximum shutter speed T _VDMAX for calculation, and then the optimum aperture value A _VD for calculation is obtained (S62 to S64). When the optimal calculation aperture value A _VD is within the aperture capacity range, the EE pulse number PN is obtained based on the value (S65, S66, S68, S7).
2).

When the optimum calculation aperture value A _VD is larger than the maximum calculation aperture value A _VDMAX , the optimum calculation aperture value A _VD
Is changed to the maximum aperture value A _VDMAX for calculation, and the optimum shutter speed T _VD for calculation is calculated again (S65 to S68). When the recalculated calculation shutter speed T _VD is _higher than the calculation maximum shutter speed T _VDMAX , a proper exposure can be obtained no matter how the calculation shutter speed T _VD and the calculation aperture value A _VD are combined. No, it is outside the so-called interlocking range, so Ev that identifies that it is out of the interlocking range
The external bit is set to "1" and the calculation shutter speed T _VD is changed to the calculation maximum shutter speed T _VDMAX , and then the EE pulse number PN is obtained (S69 to S72).
When the recalculated calculation shutter speed T _VD is within the shutter performance range, proper exposure is possible.
Skipping processing of S71, it obtains the EE pulse number PN based on the optimum calculating diaphragm value A _VD (S69, S72).

When the Ev external bit is set, the shutter speed display (maximum shutter speed T _VMAX ) and aperture display (maximum aperture value A _VMAX ) on the LCD display panel 69 shown in FIG. 41A blink.

(When it is too dark) When the optimum calculation aperture value A _VD is smaller than the minimum calculation aperture value A _VDMIN , the calculation aperture value A _VD is changed to the minimum calculation aperture value A _VDMIN before the optimum calculation The shutter speed T _VD is calculated again, and when these values are within the shutter capability range, those values are held and the EE pulse number PN is set to 0 because the aperture is open (S73 to S75, S78).

If the optimum calculation shutter speed T _VD is smaller than the minimum calculation shutter speed T _DVMIN, underexposure occurs, so the Ev external bit is set to "1" and the calculation shutter speed T _VD is calculated. After setting the minimum shutter speed T _DVMIN , the EE pulse number PN is set to 0 (S75 to S78).

After the above processing is completed, the aperture value for calculation A
_VD and calculation shutter speed T _VD are set to IPU4
Aperture value for transfer A _VT (AVT) to facilitate the process in 3
, Transfer shutter speed T _VT (TVT) (S7)
9, S80). Calculation aperture value A _VD and transfer aperture value A _VT ,
And calculation shutter speed T _VD and transfer shutter speed T
The relationship with _VT is as follows. T _VT = T _VD +10 4/8 A _VT = A _VD Note that transfer shutter speed T _VT and transfer aperture value A _VT
Is the data of 1/2 Ev step. That is, CPU4
When sending from 1 to the IPU 43, the value calculated in the 1/8 Ev step is rounded to the 1/2 Ev step. IPU43
Now, since these values are used only for display, 1/2 Ev
This is because the accuracy of steps is sufficient. In Tables 2 and 3 above,
An example of display divisions corresponding to T _VD and A _VD is shown.

With the above processing, the program exposure mode processing is completed, and the program line (diagram) shown by the solid line in FIG. 10 is obtained.

[Limited Program Exposure Mode] FIG. 1
1 is the minimum and maximum shutter speed T for calculation by the photographer.
Shown is a subroutine for a limited program (auto exposure) exposure mode in which _VD1 (TVD1), T _VD2 (TVD2) and the minimum and maximum aperture values A _VD1 (AVD1) and A _VD2 (AVD2) for calculation can be set. The flow of this subroutine is the same as that of the program exposure mode subroutine, but the minimum and maximum aperture _values for calculation A _VDMIN (AVDMIN) and A _VMAX (AVDMAX) are replaced with the minimum and maximum aperture values A _VD1 and A _VD2 , respectively. (S8
5, S93, S86, S87), calculating the minimum, maximum shutter speed _{T VDMIN (TVDMIN), T VDMAX} (TVDMAX) minimum setting respectively, the point that is replaced with the maximum shutter speed T _VD1, T _VD2 different (S95, S97 , S82, S83, S
89, S91). The program diagram of this limited program exposure mode is as shown in FIG.

The minimum and maximum shutter speeds T for these calculations
_VD1 , T _VD2 and minimum and maximum aperture values for calculation A _VD1 , A _VD2
Is set by operating the hold button 25 and rotating the Tv electronic dial 17 and the Av electronic dial 19 when the limited program exposure mode is selected. The setting operation is shown in the flowcharts of FIGS. 39C and 39D described later.

[Hyper EE automatic exposure mode] FIG.
Is a flowchart showing the first embodiment of the hypershutter priority (EE) automatic exposure mode, and the alternate long and short dash line in FIG. 10 is a diagram thereof. The basic process regarding the exposure factor calculation in the hyper shutter priority automatic exposure mode is common to the process in the normal lens auto shutter priority automatic exposure mode.

The hyper EE automatic exposure mode in this embodiment is an EE automatic exposure mode that is forcibly changed when the Tv electronic dial 17 is operated while the hyper program exposure mode is selected. The hyper EE automatic exposure mode is returned to the hyper program exposure mode by turning on the clear button 23 or turning off the power supply, and the hyper ES automatic exposure mode is forcibly changed by rotating the Av electronic dial 19. .

Here, first, the set shutter speed T _VT (TVT) transferred from the IPU 43 by communication is read and converted into the calculation shutter speed T _VD (TVD) (S10).
1). Here, the relationship between the transfer shutter speed T _VT and the calculation shutter speed T _VD is as follows. T _VD = T _VT -10 4/8 Note that the transfer shutter speed is data of 1/2 Ev step, and the calculation shutter speed T _VD
1/8 Ev Perform digit alignment on step data. Next, the optimum calculation aperture value A _VD is calculated from the calculation shutter speed T _VD and the calculation exposure value L _VD (S102). If the optimum calculating diaphragm value A _VD falls within the diaphragm capability range, it calculates the EE pulse number PN retains its value (S103, S104, S108
~ S110).

When the optimum calculation aperture value A _VD is out of the aperture capacity range, that is, when the subject is too bright or too dark, the following processing is performed. (When it is too bright) If the optimum calculation aperture value A _VD is larger than the calculation maximum aperture value A _VDMAX , the calculation aperture value A _VD is changed to the calculation maximum aperture value A _VDMAX , but this change causes overexposure. Therefore, after setting the Av out-of-range bit for identifying that the proper aperture value Av is out of interlocking, the EE pulse number PN is set (S103, S106 to S110). Av outside
When the bit is set, the aperture value display element of the LCD display panel 69 flashes Av "22" to indicate that it is overexposed.

(When it is too dark) If the optimum calculation aperture value A _VD is smaller than the calculation minimum aperture value A _VDMIN , the calculation aperture value A _VD is changed to the calculation minimum aperture value A _VDMIN. Since it is underexposed, the Av external bit is set and then the EE pulse number PN is set to 0 (S103
~ S105, S107, S108, S110). With the above processing, FIG.
The diagram indicated by the dashed-dotted line at 0 is obtained.

When the setting of the EE pulse number PN is completed, the calculation aperture value A _VD and the calculation shutter speed T _VD are converted into the transfer aperture value A _VT and the transfer shutter speed T _VT (AVDT, TVDT). The process ends (S11)
1, S112).

[Hyper ES Automatic Exposure Mode] The first embodiment of the lens auto hyper aperture priority (ES) automatic exposure mode will be described with reference to the flow chart shown in FIG. 16 and the diagram shown by the broken line in FIG. . The basic processing of the hyper ES automatic exposure mode is common to the processing of the conventional ES automatic exposure mode of lens auto (body set).

The hyper ES automatic exposure mode in this embodiment is an ES automatic exposure mode which is forcibly changed by operating the Av electronic dial 19 when the hyper program exposure mode is selected. Further, the hyper ES automatic exposure mode is returned to the hyper program exposure mode by turning on the clear button 23, turning the power off and off, and the like.
v It is forcibly changed by rotating the electronic dial 19.

Here, first, the set aperture value A _VT (AVT) transferred from the IPU 43 by communication is read and converted into the calculation aperture value A _VD (AVD) (S131). Here, the relationship between the transfer aperture value A _VT and the calculation aperture value A _VD is A _VD = A _VT . The transfer aperture is 1/2 Ev
It is the step data, and the digit is aligned with the 1/8 Ev step data of the calculation aperture value A _VD at the same time as the calculation. Next, the optimum calculation shutter speed T _VD is calculated from this value and the calculation exposure value L _VD (S132).

If the optimum calculation shutter speed T _VD is within the shutter performance range, the above values are held and the EE pulse number PN is calculated based on the calculation aperture value A _VD (S133,
S134, S138-S140).

When the optimum calculation shutter speed T _VD is out of the shutter performance range, that is, when the subject is too bright or too dark, the following processing is performed. (When too bright) The optimum calculating shutter speed T _VD changes the greater if the calculating shutter speed T _VD than calculating the maximum shutter speed T _VDMAX in the calculation the maximum shutter speed T _VDMAX, the over-exposed by this change Therefore, the EE pulse number PN is set after setting the Tv external bit that identifies that the proper shutter speed Tv is out of the shutter capability (S133, S136 to S140).

(When it is too dark) If the optimum calculation shutter speed T _VD is smaller than the calculation minimum shutter speed T _VDMIN , the calculation shutter speed T _VD is changed to the calculation minimum shutter speed T _VDMIN. Since underexposure occurs, set the Tv external bit and set the EE pulse number PN to 0 (S133 to S135, S137, S138 to S14).
0).

When the setting of the EE pulse number PN is completed, the calculation aperture value A _VD and the calculation shutter speed T _VD are converted into the transfer aperture value A _VT and the transfer shutter speed T _VT , respectively, and the exposure factor The calculation ends (S141, S142).
Through the above processing, the diagram shown by the broken line in FIG. 10 is obtained.

[Second hyper EE, ES automatic exposure mode] The second hyper EE, ES automatic exposure mode in the present embodiment is the priority when the overexposure or underexposure is obtained only by changing the non-priority exposure factor. This is the mode to change the exposure factor. In the hyper EE and ES automatic exposure modes described above, the aperture value or shutter speed that has been set as a priority is not changed when the subject is too bright or too dark, whereas the second hyper EE and ES in the present embodiment are not changed.
The automatic exposure mode is a mode in which the priority exposure factor is changed when overexposure or underexposure is caused only by changing the non-priority exposure factor.

In the second hyper EE and ES automatic exposure mode, when the over-exposure or under-exposure occurs with the shutter speed or aperture value set to the priority, the shutter speed or aperture value set to the priority is set to the proper exposure. The direction is changed to (see FIG. 15 and FIG. 18). The processing operation of the second hyper EE automatic exposure mode will be described based on the flowchart shown in FIG. 14, and the processing operation of the second hyper ES automatic exposure mode will be described based on the flowchart shown in FIG.

In the second hyper EE automatic exposure mode, first, by operating the Tv electronic dial 17, the set shutter speed T _VT stored in the IPU 43 is read and converted into a calculation shutter speed T _VD , and this value T _VD is obtained. The optimum calculation aperture value A _VD is calculated with the calculation exposure value L _VD (S121, S12
2). Then, if the optimum calculating diaphragm value A _VD is within the diaphragm capability range as it enters the S132 of the hyper ES automatic exposure mode (FIG. 16) (S123, S125, S127 ).

The subject is too bright and the optimum aperture value for calculation A _VD
Is larger than the maximum aperture value for calculation A _VDMAX , the optimum aperture value for operation A _VD is changed to the maximum aperture value for operation A _VDMAX , and then S132 is entered (S123 to S125, S127). The subject is too dark and the optimum calculation aperture value A _VD is the minimum calculation aperture value A.
When it is smaller than _VDMIN , this optimum aperture value for calculation A
_After changing _VD to the minimum aperture value for calculation A _VDMIN , the _{process proceeds} to S132 (S123, S125 to S127).

When S132 of the hyper ES automatic exposure mode (aperture priority automatic exposure mode) is entered, the calculation shutter speed T _VD is recalculated and the shutter speed changing process is performed.

By the above processing, the solid line in FIG.
Since the diagrams indicated by the one-dot chain line and the two-dot chain line are obtained, the proper exposure range is expanded. It also works in shutter-priority automatic exposure mode within a certain range,
It can be considered as a kind of program automatic exposure mode.

In the second hyper ES automatic exposure mode, first, by operating the Av electronic dial 19, the set aperture value A _VT stored in the IPU 43 is read and converted into the aperture value A _VD for calculation, and this value and the aperture value for calculation are calculated. The optimum calculation shutter speed T _VD is calculated based on the exposure value L _VD (S151, S
152). If the optimal calculation shutter speed T _VD is within the shutter capability range, the value is held and the process enters S102 of the hyper EE automatic exposure mode (FIG. 13) (S1
53, S155, S157).

When the subject is too bright and the optimum calculation shutter speed T _VD is larger than the maximum calculation shutter speed T _VDMAX , the optimum calculation shutter speed T _VD is changed to the maximum calculation shutter speed T _VDMAX before the shutter is _released. Step S102 of the priority automatic exposure mode is entered (S153 to S155,
S157).

When the subject is too dark and the optimum calculation shutter speed T _VD is smaller than the minimum calculation shutter speed T _{VD MIN} , the optimum calculation shutter speed T _VD is changed to the minimum calculation shutter speed T _VDMIN , and then S102. Enter (S1
53, S155-S157). When S102 is entered, the aperture value for calculation A _VD is calculated again, and the aperture value is changed (S103 to S112).

By the above processing, the solid line in FIG.
The diagrams shown by the one-dot chain line and the two-dot chain line are obtained, and the proper exposure range is expanded. It should be noted that this can be considered as a kind of program automatic exposure mode that functions in the aperture priority automatic exposure mode within a certain range.

The first and second hyper EE and hyper ES automatic exposure modes described above have been described as being separate, but they can be implemented in the same camera. That is, the E ² included in the IPU 43
2 bits in the exposure mode data of the PROM 43c may be associated with the first / second method in the hyper EE and hyper ES automatic exposure modes. These data are
Transferred to the CPU 41 by IPU communication, hyper EE,
If the above two bits are judged after the hyper ES is judged, the first or second hyper EE or hyper ES automatic exposure mode can be switched.

[LA hyper manual exposure mode]
The hyper manual exposure mode of the body set in which both the shutter speed and the aperture value can be manually set by the operation on the camera body 11 side will be described with reference to the flowchart shown in FIG.

The hyper-automatic exposure mode of lens auto in this embodiment is usually a manual exposure mode in which the photographer sets an exposure factor by operating the electronic dials 17 and 19, but when the clear button 23 is turned on. , When it is turned on, the appropriate exposure factor is calculated according to the subject brightness Bv by the same algorithm as the program exposure mode, and when turned off, the calculated exposure factor is replaced with the manually set exposure mode. is there.

In the LA hyper manual exposure mode, the Tv electronic dial 17 and the Av electronic dial 19 are used.
Both the shutter speed Tv and the aperture value Av can be set by the operation of. Further, by turning on the clear button 23, the same effect as switching to the program automatic exposure mode can be obtained. Further, the set shutter speed Tv and aperture value Av are the RAM 43 of the IPU 43.
It is stored in a predetermined address of b and is displayed on the LCD panel 69 and the in-viewfinder display unit 71 provided in the field of view of the finder.

In the LA hyper manual exposure mode, when the clear button 23 is turned on,
The calculation shutter speed T _VD and the calculation aperture value A _VD are calculated in the program exposure mode, and the process proceeds to S167 (S1
64). On the other hand, if the clear button 23 is not turned on, the set aperture value A _VT and the set shutter speed T _VT sent from the IPU 43 are converted and set as they are into the calculation aperture value A _VD and the calculation shutter speed T _VD , respectively. And proceed to S167 (S161 to S163).

In S167, the exposure value (A _VD + T _VD ) based on the calculation aperture value A _VD equal to these set values and the calculation shutter speed T _VD equal to the set values, and the proper calculation exposure based on the actual photometry. The exposure error ΔEv is calculated from the value L _VD by the following equation. ΔEv = L _VD − (A _VD + T _VD )

This exposure error ΔEv is within the allowable range (-3/8 <
If ΔEv <+3/8), both the fixed point LED over bit and the under bit are set, and the pair of exposed display elements 71a and 71b (see FIG. 42E) of the in-finder display unit 71 are both turned on (S168). , S170,
S171).

When the exposure error ΔEv is larger than the permissible value, the exposure display element 71 of the information indicating the overexposure is displayed.
Only the fixed point LED over bit for turning on a is set (S168, S169), and when it is smaller than the allowable value, the lower exposure display element 71b for displaying underexposure.
Set only the fixed point LED under bit to turn on (S168, S170, S172). In the present embodiment, the allowable value of the exposure error ΔEv is less than ± 3/8 Ev, but this value can be set arbitrarily, and the values on the over side and the under side may be different. Further, the latitude of the loaded film may be read from the DX code and this may be set as the allowable value.

Then, based on the calculation aperture value A _VD , EE
The number of pulses PN is calculated (S173, S174, S17
5) calculating diaphragm value A _VD and the calculating shutter speed T _VD
To the transfer aperture value A _VT and the transfer shutter speed T _VT , respectively, and the process ends (S176, S17).
7).

With the above processing, when the clear button 23 is turned on in the hyper manual exposure mode, both the shutter speed Tv and the aperture value Av become appropriate values according to the photometric value (subject brightness Bv) in the program exposure mode. Since it is changed, you can quickly and manually set the proper exposure value with a simple operation. In the present embodiment, while the clear button 23 is turned on, the proper exposure factor is continuously calculated.
The proper exposure factor may be calculated and set in the RAM 41b only when 3 is switched from off to on.
In this case, S161 may be changed to a process of checking whether or not the clear button 23 has changed from off to on.

[Second LA hyper manual exposure mode] In the above processing, when the clear button 23 is turned on, Tv and A measured by the program automatic exposure mode are measured.
In the example, the value is changed to the v value, but only one of the exposure factors (shutter speed Tv or aperture value Av) may be changed to an appropriate value. Further, since it is the manual exposure mode, it is possible to set the values to the Tv and Av series values even if the exposure value is not the proper exposure value Ev. Here, since the step of the apex value set by the calculation of the CPU 41 is smaller than the step of the manually settable apex value by the value of the Tv and Av series, the calculated apex value can be manually set by the apex. A value rounded to the value step.

Whether the proper value or the series value is set is determined by the E ² PROM 43.
It is determined by 1 bit in the hyper manual select flag of c. In the present embodiment, as shown in FIG.
If the bit is “0”, it is a series value setting, and if it is “1”, it is an appropriate value setting. In addition, the type of automatic exposure mode is determined by the 1st bit and the 2nd bit of the 2nd bit in the flag. Note that this bit may be set at the time of shipment of the camera or may be set or changed by the photographer.

FIG. 24 is a flowchart showing a combination of an example of changing at least one of the above exposure factors to an appropriate value and an example of appropriate / series change using the data of the hyper manual select flag of the E ² PROM 43c in the IPU 43. It was Although the data of the E ² PROM 43c is stored in the RAM 43b of the IPU 43 during operation, the same data is stored in the CPU 4 by CPU-IPU communication.
1 is also stored in the RAM 41b.

The on / off state of the clear button 23 is checked, and if it is on, the process proceeds to S603 (S60
1). In S603, Tv and Av during LA hyper manual based on the hyper manual select flag data are set.
Check the change mode of. Here, bits 1 and 2 of the hyper manual select flag data correspond. If the value of 2 bits is "0", the process proceeds to the program automatic exposure mode process (S605), if it is "1", the process proceeds to LA aperture priority automatic exposure mode process (S607), and if it is "2", the LA shutter priority automatic exposure mode The process proceeds to step S609, and if "3", the exposure mode process is not performed and step S61 is performed.
Go to 1. By these processes, the shutter speed for calculation T
_VD , aperture value for calculation A _VD and shutter speed for display T _VT ,
The display aperture value A _VT is stored in the RAM 41b in the CPU 41.

Next, select flag data series / property
Check the bit (S611). If the value is "0", the sequence value setting process (S613) is performed. If the value is "1", the process is an appropriate value process, and thus the process directly proceeds to the Manual-1 subroutine. Since the appropriate value process is the same as that in the first embodiment, the process for the case of the series value will be described. S605, S60
7. Performing AVTD and TVTD processes after the processes of S609 and S609 means that the appropriate values for calculation T _VD , A
Despite _{obtaining VD} , the display shutter speed T _VT and aperture value A _VT calculated based on these values (S60
5, the final TVDT and AVDT processes in the subroutines of S607 and S609), the shutter speed for calculation T _VD (S613) and the aperture value for calculation A _VD (S61) are calculated again.
This is equivalent to recalculating 5). This process, once obtained for calculating optimum shutter speed T _VD, the aperture value A _VD is calculating sequence shutter speed T _VD, will have been converted to the aperture value A _VD. The processing after S167 is exactly the same as that of the first embodiment.

According to the second embodiment described above, the following 6
It is possible to select the type of LA hyper manual exposure mode. Exposure control by the appropriate shutter speed Tv and aperture value Av obtained in the program automatic exposure mode by pressing the clear button 23 (first embodiment). By pressing the clear button 23, a series (rounding) shutter speed T obtained in the program automatic exposure mode
Exposure control by v and aperture value Av. Exposure control by the proper aperture value Av obtained in the shutter speed priority automatic exposure mode by pressing the clear button 23. A series (rounded) aperture value A obtained in the shutter speed priority automatic exposure mode by pressing the clear button 23
Exposure control by v. Exposure control by the proper shutter speed Tv obtained in the aperture priority automatic exposure mode by pressing the clear button 23. By pressing the clear button 23, a series (rounding) shutter speed Tv obtained in the aperture priority automatic exposure mode
Exposure control by.

[LM hyper manual exposure mode]
Next, the hyper manual exposure mode of lens manual in which the shutter speed is set by the camera body 11 and the aperture value is set by the taking lens 65 will be described with reference to the flowchart shown in FIG.

In the LM hyper manual exposure mode of this embodiment, normally, the shutter speed Tv is manually set by operating the Tv electronic dial 17, but the shutter speed Tv is turned on by operating the clear button 23 (clear switch SWCL). Indicates a mode in which the value is automatically set (changed) to an appropriate value according to the subject brightness Bv.

When the clear button 23 is not turned on, the transfer shutter speed T _VT (1/2 Ev step value) sent from the IPU 43 is directly converted to the calculation shutter speed T _VD and the process proceeds to S185. (S181,
S182).

On the other hand, when the clear button 23 is turned on, it will be described later on the basis of the aperture value Av set by the aperture ring of the taking lens 65, which is input via the aperture volume 53 and the AD converter 51. The shutter speed Tv is calculated in the lens manual aperture priority (ES) automatic exposure mode (S181, S183). Then, as in the LA hyper manual exposure mode, it is checked whether the series value setting or the proper value setting is performed (S18).
4). Then, if it is a series value setting, the process proceeds to S182, and if it is an appropriate value setting, the process proceeds to S185. The reason why the TVDT process (S182) is performed in the case of the series value setting is for the same reason as in the LA hyper manual exposure mode.

In step S185, the calculation aperture value A _VVRD (AVVRD is calculated from the AD conversion value AVA / D of the aperture value Av set by the aperture ring of the taking lens 65 and the adjustment value A _VADJ (AVADJ) unique to the camera body 11. ) Is calculated. Based on these values the formula to calculate the exposure error Delta] Ev by _{ΔEv = L VD -T VD -A VVRD} -MND (S186).

If this exposure error ΔEv is within the allowable range, the fixed point LED over bit and under bit are set, if it is larger than the allowable value, the fixed point LED over bit is set, and if it is smaller than the allowable value, the fixed point LED under bit is set.
Set (S187 ~ S191). Then, the EE pulse number P
N is set to the maximum value (255 in this embodiment), the shutter speed for calculation T _VD is converted to the shutter speed for transfer T _VT , and the exposure factor setting process is terminated (S192, S193). The EE pulse number PN is set to the maximum value so that the aperture mechanism of the camera body 11 is driven completely to the aperture stop position so that the aperture value set by the aperture ring of the taking lens 65 is surely apertured. This is because.

As described above, in the LM hyper manual exposure mode, the shutter speed Tv is set to an appropriate value obtained in the aperture priority automatic exposure mode or a rounded series value by turning on the clear button 23, so that a simple operation is possible. You can quickly and manually set the proper exposure value.

[LM Aperture Priority Automatic Exposure Mode] Next, the lens manual aperture priority (ES) exposure mode in which the aperture is set by the aperture ring of the taking lens 65 will be described with reference to the flowchart shown in FIG.

Here, the calculation aperture value A _VVRD is calculated from the AD conversion value AVA / D value of the aperture value Av set by the aperture ring of the taking lens 65 and the adjustment value A _VADJ specific to the camera body 11. (S201). Further, based on these values, the calculation shutter speed T _VD is calculated by the formula T _VD = L _VD -A _VVRD -MND (S20).
2). If the calculation shutter speed T _VD is within the shutter capability range, the EE pulse number PN is set to the maximum value as it is (S203, S205, S208). If the calculation shutter speed T _VD is larger than the calculation maximum shutter speed T _VMAX , after changing to this (S203, S20
4) _If it is smaller than the minimum shutter speed for calculation T _VMIN , change it to this (S203, S205, S20)
6), after setting Ev external bit, EE pulse number PN
Is set to the maximum value (S207 to S208).

Finally, the shutter speed for calculation T _{VD is set} to IPU.
The shutter speed for transfer T _VT is transferred to _S43 , and the process is terminated (S209).

[LA, LM Bulb Exposure Mode] Next, the bulb exposure mode will be described with reference to the flowcharts shown in FIGS. 22 and 23. In case of lens exposure bulb exposure mode, first, Av electronic dial 19
The transfer aperture value A _VT set by is read by the CPU-IPU communication and converted into the calculation aperture value A _VD (S2
11). The EE corresponding to this calculation aperture value _AVD
The number of pulses PN is calculated and set (S212, S21
3) The fixed point LED under bit and over bit are reset, the calculation aperture value A _VD is converted again to the transfer aperture value A _VT , and then the processing ends (S215, S216). When the calculation aperture value A _VD is equal to the calculation minimum aperture value A _VDMIN , the EE pulse number PN is set to 0 (S2).
12, S214).

In the case of the lens manual bulb exposure mode, as shown in FIG. 23, the EE pulse number PN is set to the maximum value to enable the aperture value to be set down by the aperture ring of the taking lens. The fixed point LED under bit and over bit are reset and the processing ends.

"IPU Main Routine" Above is CPU4
The processing of No. 1 has been described, but the processing of the IPU 43 will be described next. First, the main operation of the IPU 43 will be described with reference to the flowchart shown in FIG. Note that the internal RAM 43b of the IPU 43 has been sent by manually setting the aperture value Av and the shutter speed Tv, the display aperture value Av and the shutter speed Tv, the selected exposure mode, communication with the CPU 41, and lens communication. Shooting information such as the transfer aperture value A _VT , the transfer shutter speed T _VT , the maximum F number FNo, and the minimum number FNo are stored in different addresses.

The IPU 43 always operates while the battery of the camera is inserted, and when the battery is turned on, the IPU-MAIN of FIG. 26 is executed. First IPU43
Initializes the port and the RAM 43b and initializes various modes (S220 to S222).
Next, the initial mode of the exposure mode is set. This is I
It is decided based on the state of the port PL0 of the PU 43. In the lens auto mode, the hyper program exposure mode is set, and in the lens manual mode, the aperture priority automatic exposure mode is set.

Next, the intermittent process by the 32 ms timer is repeated (S223 to S229-2). The IPU 43 executes the following processing in this intermittent processing. When the 32ms timer times out, input the switch input, that is, the level of the switch input ports PC0 to PB5 in order,
When it has fallen to the “L” level (when it is on), input processing and lens type determination corresponding to the switch are executed, and information such as the mode and lens type set by these switches is stored in the RAM 43b. The lens data is written and the lens data is input to the IPU 43 by lens communication (S223 to S225). If the time is not up, jump to S228 (S223,
S228).

Next, it is checked whether or not the main switch SWMAIN is turned on, and if it is turned off, Hyp
Clear the -Tv flag and the Hyp-Av flag,
Turn off power hold (turn off main power of CPU41)
) And clears the ML mode flag (hold bit) and returns to S223 (S226, S226-2, S22).
9-2). If the main switch SWMAIN is on,
Whether or not the photometric switch SWS is turned on is checked. If the photometric switch SWS is turned on, it is considered that the shooting operation has started or is in progress. Therefore, after starting the photometric timer and turning on the power hold to operate the CPU 41, S2
28, but (S226, S227-1, S227-
2, S228), if the photometric switch SWS is not turned on, skip the photometric timer start and power hold-on processing and proceed to S228 (S226, S22).
7-1, S228).

In step S228, information such as the aperture value (F) and shutter speed (S ^-1 ) information used for shooting in the selected shooting mode is displayed on the LCD panel 69 and the viewfinder display unit 7.
Display in 1. Then, it is checked whether or not the photometric timer has timed out. If the time has expired, the power hold is turned off. If the time has not expired, the process directly returns to S223 (S229-1, S229-
2, S223).

During the timer intermittent process, C
If a communication interrupt is input from the PU 41, communication processing is executed, and if the electronic dials 17 and 19 are rotated, electronic dial setting processing is executed. The main switch S
These interrupts do not occur when WMAIN is turned off.

"Communication Processing with Lens" Regarding the subroutine concerning communication with the lens CPU in S225,
This will be described with reference to FIG. First, the IPU43 is a pin CO
Mount pin information (open F number Fmin, maximum F number Fmax) by dropping NT to "L" level (logic "0")
And (auto / manual (A / M) information) (S31, S32). The previous application by the applicant (Japanese Patent Laid-Open No.
63-184719), pin RES / Fmin3, SI /
A transistor is connected to the pin of the taking lens that makes contact with Fmin2, Fmax1, Fmax2 and ■ SCK ■ / Fmin1.
3-bit open F-number Fmin and 2-bit maximum F-number Fmax information are formed by a combination of levels that change depending on ON / OFF of each transistor. Further, an A / M switch SWA / M is connected to the pin A / M, and 1-bit aperture auto / manual information is formed by turning the A / M switch SWA / M ON / OFF.

The CPU 41 sets the pin CONT to logical "1".
Depending on whether the pin CONT level is set to "1" by reversing to ("H" level), whether the auto AF lens KAF is attached or not attached and whether the lens is not attached or not Is determined (S33,
S34). The lenses that can be identified in this embodiment are a manual lens K without a mount pin and an automatic lens KA with a mount pin but no lens ROM.
, Auto A with mount pin and lens ROM
There are three types of F lens KAF.

If the pin CONT is "1", the taking lens 6
The lens communication is executed with the camera 5 and the lens data is input (S34, S35). And mount pin Fmax1
If the levels of ~ 2 and Fmin1 to 3 are all "1" and the 5-bit lens type bit is "1 1 1 1 1", it is considered that the lens ROM has failed, so no lens NoLens bit is set. Set and return (S3
6, S37, S38). Mount pins Fmax1 to Fmax2,
Even if only one level of Fmin1 to Fmin3 is "0", the lens type input by lens communication is the auto AF lens K.
If it is AF, the auto AF lens KAFLens bit is set and the process returns (S36, S39, S40).

If none of the above, it is checked whether the lens is automatic or the lens is manual. If the lens is automatic, the automatic lens KALens bit is set and the process returns (S34 to S36, S39, S41, S42).

Lens manual and pin Fmax
If the levels of 1 and 2 are "1 1" and the levels of the pins Fmin1 to 3 are "1 1 1", the taking lens is not mounted, so the lensless NoLens bit is set and the process returns (S
43, S44).

Lens manual and pin Fmax
If the levels of 1 and 2 are "0 0" and the levels of the pins Fmin1 to 3 are "0 0 0", the lens is a manual lens K, so the manual lens KLens bit is set and the process returns (S
45, S46).

If the pins Fmax1 and max2 and the pins Fmin1 to min3 are not all "1" or "0", it is the auto lens KALens set in the lens manual, so the auto lens KAlens bit is set and the process returns (S41, S).
43, S45, S42).

With the above processing, the IPU can be used to determine the lens type, various lens information, and lens auto / manual.
It is set in the memory 43 and further transferred to the CPU 41.

FIG. 28 shows a subroutine of the switch input process in S224. Drive switch SW
When any of DRIVE, ISO sensitivity setting switch SWISO, exposure compensation switch SW ± EF and exposure mode switch SWMODE is turned on, the corresponding subroutine (only mode shift and MODE IN subroutine is shown)
The processing is executed in the process (S231 to S233).
When these input processes are completed, the mode shift process, the mode IN process, and the memory lock process are executed and the process returns (S234 to S236). The mode shift subroutine, MODE IN subroutine and memory lock subroutine will be described later.

[Electronic Dial Processing] FIGS.
The flowchart of the subroutine regarding the electronic dial processing of S227 and S228 is shown. This subroutine is interrupted when Tv, Av electronic dials 17, 19 are rotated in either direction and any of ports PA0, A1, A2, A3 becomes "0".
, Set Av dial change bit (S271, S28
1).

When the Tv electronic dial 17 is rotated, a detection process of which direction the Tv electronic dial 17 is rotated is executed (S272). That is, when the Tv electronic dial 17 is rotated clockwise, the port PA0 is first set to "0".
Since the port PA1 remains "1", the right rotation bit is set, and when it is rotated counterclockwise, the port PA1 will be "0" first.
Since the port PA0 remains "1", the right rotation bit is reset and the process returns (S273, S27).
4).

Similarly, when the Av electronic dial 19 is rotated, the Av dial change bit is set and the right rotation bit is set and reset (S282-S284).
These electronic dial change bit and right rotation bit are used in later Av and Tv electronic dial set processing, exposure mode selection processing and the like.

[Tv, Av electronic dial set] Next,
The processing of the IPU 43 when the electronic dials 17 and 19 are rotated while the specific exposure mode is selected will be described with reference to the subroutines shown in FIGS. 31 and 32. The specific exposure mode in this embodiment is a program, limited program, hyper program, EE auto, ES auto of lens auto, and manual exposure mode. Further, in the present embodiment, the shutter ability of the camera body is 30 seconds to 1/8000 seconds (T
v = −5 Tv to +13 Tv), and the aperture capacity is the open F number Fmin read from the taking lens.
The range is from (= Avmin) to the maximum F number Fmax (= Avmax), and for the sake of simplification of description, it is assumed that the manual setting accuracy is set to 1/2 Ev for both Tv and Av.

In the Tv dial set, first, Tv
The dial change bit is checked, and if it is "0", the process directly returns, and if it is "1", it is checked whether the right rotation bit is set (S401, S40).
2). If the clockwise rotation bit is set (Tv electronic dial 19 is rotated clockwise), the shutter speed Tv is added in 1 / 2Tv units until the maximum shutter speed Tvmax is reached (S4).
02, S403, S404). If the right rotation bit is reset (Tv electronic dial 17 is rotated left), the shutter speed Tv is halved until the minimum shutter speed Tvmin is reached.
Subtract in Tv units (S402, S405, S40
6). Then, clear the Tv dial change bit,
v Reset the right rotation bit and return (S40
7).

On the other hand, in the Av dial check,
If the Av electronic dial 19 is rotated to the right, aperture value A
v is added in units of 1/2 Av (until the maximum aperture value Avmax is reached) (S411 to S414). Then, the Av dial change bit is cleared, the Av right rotation bit is reset, and the process returns (S418). On the other hand, if the Av electronic dial 19 is rotated counterclockwise, the aperture value Av is set to 1/2 A.
Subtract by v (until the minimum aperture value Avmin) (S
411, S412, S415, S416). And A
The v dial change bit is cleared, the Av rotation bit is reset, and then the process returns (S418).

[Selection of Exposure Mode] Next, the operation of selecting the exposure mode will be described with reference to the subroutines shown in FIGS. 33 and 34A and 34B. The exposure mode changing operation is executed by the IPU 43 based on the program stored in the internal ROM 43a of the IPU 43.

[Mode Shift Processing] Mode shift processing is processing for changing the IPU mode related to the exposure mode to the CPU mode. That is, this is a process of changing the IPU mode to the CPU mode when the IPU 43 has the IPU mode NO. To be used in the IPU 43 and the CPU mode NO. Table 4 shows the relationship between the IPU mode NO. And the CPU mode NO.

[Table 4]

FIG. 33 shows this mode shift processing.
This will be described with reference to the flowchart shown in FIG. IPU4
3 checks whether the lens aperture mode is automatic or manual, and if it is manual, sets the CPU mode to the lens manual mode and returns (S6).
21, S623). Lens auto and Hyper T
When both the v flag and the hyper Av flag are cleared, the CPU mode is added to the lens auto mode by 8 and the process returns. When the Hyper Tv flag is set, the CPU mode is set to "8".
And return (S621, S625, S6
27). When the hyper Av flag is set, the CPU mode is set to "7" and the process returns (S621, S625, S629, S631).

[Mode In Processing] Mode In Processing (S2
35) is when the exposure mode / drive lever 29 is slid to the MODE side in the intermittent processing of the 32 ms timer (when the exposure mode switch SWMODE is turned on).
Then, it is processed as one subroutine in the SW-IN processing (S224). And changing the exposure mode is
This is performed by operating the Tv electronic dial 17 while the exposure mode / drive lever 29 is slid to the MODE side. The exposure mode numbers and the corresponding exposure modes are
As shown in Table 4 above. This mode-in process will be described in more detail with reference to the flowcharts shown in FIGS. 34A and 34B. In addition, there is no independent mode No. in Hyper EE and Hyper ES, it is the same exposure mode No. (14) as Hyper Program, and Hyp-Tv.
, Hyp-Av flag.

The photographing lens in this embodiment has an auto / manual switch SWA / M by rotating the aperture ring of the lens, but when the auto / manual switch SWA / M is manual, the aperture is set to the lens. Set by the side. Therefore, when it is determined that the lens is manual in S241, the process proceeds to S242, and the exposure mode is set to the LM aperture priority (ES) automatic exposure mode (exposure mode).
NO.2), LM hyper manual exposure mode (exposure mode NO.1), LM bulb exposure mode (exposure mode NO.
Select from 0). The initial state is LM
It is the aperture priority automatic exposure mode (exposure mode NO. 2).

In S242, it is checked whether the mode switch SWMODE is on, and if it is on, Tv
Check whether the electronic dial 17 has been rotated (whether the Tv dial change bit is set),
If it has not changed, reset the Tv dial change bit and proceed to the check subroutine. If it has changed, it is a right rotation (whether the right rotation bit is set).
Is checked (S243, S244, S251).

When the Tv electronic dial 17 is rotated counterclockwise (when the clockwise rotation bit is "0"), the exposure mode is set to L.
M throttle priority → LM hyper manual → LM valve → L
It cyclically changes one by one in descending order of M aperture priority, resets the Tv dial change bit, and then jumps to a check subroutine (S241 to S247, S251).

When the Tv electronic dial 17 is rotated to the right (when the right rotation bit is "1"), the exposure mode is cyclically changed one by one in the ascending order opposite to the above, and the Tv dial change bit is reset. To check subroutine (S244, S248 to S251).

When the exposure mode switch SWMODE is off or the Tv electronic dial 17 is not operated (when the Tv dial change bit is "0"),
Reset the Tv dial change bit without changing the exposure mode and jump to the check subroutine (S242, S
243, S251).

"Check Subroutine" In the check subroutine, as shown in FIG. 34, when any of NOLensbit, hyper Av flag, and hyper Tv flag is set, the hyper Av flag and hyper Tv flag are lowered, and then the mode display processing is performed. And then return. The Hyper Tv flag and Hyper Av flag are
It is an alternative to the AE mode. That is, instead of putting the hyper EE and the hyper ES in the AE mode type, the identification is made by the hyper Tv flag and the hyper Av flag.

Therefore, during hyper EE, the hyper program (NO.14) in the AE mode type and the hyper Tv flag are set, and during hyper ES, the AE
The hyper program (NO.14) and the hyper Av flag in the mode type are set. On the contrary, Hyper E
To return from the E or hyper ES mode to the hyper program mode, the hyper Av flag or the hyper Tv flag may be reset. With this check subroutine, the hyper Av flag and hyper Tv flag are always reset in the case of lens manual, so when the auto / manual switch SWA / M is switched from manual to auto, or when the taking lens is once removed. When reattached, the exposure mode is initialized to the hyper program exposure mode.

When the taking lens is an auto lens and therefore the auto / manual switch SWA / M is switched to auto, the exposure mode switch SW
The exposure mode is set as follows: PROGRAM → HYPER PROGRAM → LIMITED PROGRAM → …… → LA valve → provided that MODE is on and the Tv electronic dial 17 is rotated counterclockwise.
The program is cyclically changed one by one in the order of program →, and display processing is performed (S241, S251 to S257, S264). When the Tv electronic dial 17 is rotated to the right, the exposure modes are cyclically changed one by one in the ascending order opposite to the above, and the display processing is performed (S258 to S260, S264).

On the other hand, in the lens auto mode, when either the exposure mode switch SWMODE or the Tv electronic dial 17 is turned off, the exposure mode selection processing is not performed (S241, S251 to S253, S261). If the clear button 23 is not turned on (the clear switch SWCL is turned on), the current exposure mode is displayed (S261,
S264).

When the clear button 23 is turned on, when the exposure mode is hyper EE or hyper ES, these are initialized to the hyper program mode, and in other exposure modes, the mode is maintained as it is.
That is, since the Hyper Tv flag or the Hyper Av flag is set in the Hyper EE or Hyper ES automatic exposure mode, these are reset (S
261, S263). As a result, when the photographer presses the clear button 23, in the hyper EE or hyper ES exposure mode, the hyper program exposure mode is restored.

In the above exposure mode selection processing, the hyper EE and hyper ES automatic exposure modes cannot be directly selected. The hyper EE and hyper ES automatic exposure modes are selected by operating the electronic dials 17 and 19 while the hyper program exposure mode is selected. That is, when the electronic dials 17 and 19 are rotated while the hyper program is selected, the hyper Av flag or the hyper Tv flag is set, and the hyper EE or hyper ES automatic exposure mode can be forcibly changed. When the hyper EE or hyper ES automatic exposure mode is selected, it is possible to forcibly change to the hyper ES or hyper EE automatic exposure mode by operating the electronic dials 17 and 19. Further, by turning on the clear button 23, the hyper EE / hyper ES automatic exposure mode can be forcibly changed to the hyper program exposure mode. The above-mentioned forced change display is executed in the exposure mode display processing described later.

In the above embodiments, a series of numbers are given to the exposure modes in the lens auto mode and the lens manual mode to simplify the explanation and processing. However, in the IPU 43, the exposure mode is actually stored as separate data for the lens auto mode and the lens manual mode. Further, lens auto / manual (A / M), Hyp-Tv flag and Hyp-Av flag are assigned in this memory. The contents are shown in FIG.

Here, aperture auto and manual information (A / M terminal) that can be switched by the aperture ring of the taking lens are
For example, when the mode is auto ("0"), the exposure mode is determined by 3 bits for lens auto mode and Hyp-Tv, Av flags, and when the mode is manual ("1"), the exposure mode is determined by 2 bits for lens manual mode. To do. Then, it is sent to the CPU 41 as 4-bit exposure mode data which is a combination of the auto and manual exposure modes. The correspondence between the exposure mode (IPU mode) in the IPU and the exposure mode (CPU mode) for the CPU is as shown in Table 4.

[Memory Lock Processing] The memory lock of the present embodiment means that the exposure value Ev is locked when the hold button 25 is pressed once, and the exposure value Ev is pressed when the hold button 25 is pressed twice.
Unlock the. That is, every time the hold button 25 is turned on and off, the exposure value Ev is locked and released repeatedly. In this memory lock process, for example, 3 bits in the memory lock flag data in the RAM 43b are used. As shown in FIG. 38, 1 bit is the ML mode flag (hold bit), 1 bit is the current hold switch data, and the remaining 1 bit is the old hold switch data. These data are all cleared in the initial state.

Regarding the memory lock process of S236,
This will be described in more detail with reference to the flowchart shown in FIG. In this process, the ML mode flag is set and reset each time the hold switch 25 is turned on and off. First, move the current hold switch data to the old hold switch data and turn ON / OFF the hold switch 25.
The state is put in the current hold switch data (S641,
S643). That is, if the hold switch 25 is turned on, it is set (“1”), and if it is turned off, it is reset (“0”). Although the hold switch 25 is a normally open self-reset type, the processing time of the microcomputer is usually very short. Therefore, while the photographer is turning on the hold switch 25, this memory lock processing subroutine is executed a plurality of times. Let's pass.

Next, the state of the current hold switch data is checked (S645). Since it is reset when the hold switch 25 is off, the process proceeds to the memory lock display processing. Since it is set when the hold switch 25 is turned on, the flow advances to S651 to check the old hold switch data.
When the hold switch 25 is turned on for the first process, or when the hold switch 25 is turned off for the second and subsequent processes, the process is reset, so the process proceeds to S651, and when the switch is in the on state for the second and subsequent processes, or Since it is set at the first processing after it is turned off, S
Proceed to 649.

In S651, it is checked whether or not the ML mode flag is set. If it is set, the ML mode flag is cleared, and if it is cleared, the ML mode flag is set (S655, S6).
53). When the ML mode flag is set, the currently set exposure value Ev is stored (locked), the power hold flag is set for 5 seconds, and the process proceeds to the ML display process (S655, S657, S659). When the ML mode display flag is cleared, the process directly proceeds to the ML display process (S651, S653).

It is checked in step S649 if the ML mode flag is set. Hold switch 2
Since it is set when 5 is turned on, S6
The program proceeds to step 59, where it is cleared when it is turned off, so the procedure directly proceeds to the ML mode display processing.

In the ML display process, first, the "*" mark display flag is cleared, and if the ML mode flag is reset, the process directly returns, and if it is set, "*" is displayed.
Set the mark display flag and then return (S6
63, S665).

[Exposure Mode Display, Mode and Setting Change Processing] Display examples of the LCD panel 69 and the viewfinder display unit 71 are shown in FIGS. 41A to 41F and 42.
A to FIG. 42F and FIGS. 43A to 43C are shown side by side. 41A, the LCD
All display elements (liquid crystal segments) that form displays of characters, codes, figures, etc. of the panel 69 and the viewfinder display unit 71 are shown. FIG. 41B shows a display mode when the main switch SWMAIN is turned off. The other figures show various display modes of this embodiment. The relationship between the exposure mode display processing of S264 and the above display will be described with reference to the flowcharts shown in FIGS. 39A to 39D. This process is based on the program stored in the internal ROM 43a of the IPU 43.
It is executed by the PU 43.

When the mounted lens is automatic, S
In step S302, the following display processing is performed. [Hyper-program exposure mode] Although the hyper-program exposure mode is set, the electronic dial 17, 1
When none 9 is not operated, that is the hyper program exposure mode "H _Y P", the initial value of the shutter speed Tv "Tv 8Ooo" (1/8000 sec), the aperture value Av
The initial value "Av 5.6" (F5.6) and the number of shots "22" (22) are displayed on the LCD panel 69 in the manner shown in FIG. 42B, and the initial values of the shutter speed Tv and the aperture value Av are displayed. Display unit 71 in viewfinder
Is displayed on the screen (S302 to S308).

Then, on condition that the CPU 41 is in the power hold state, the IPU 43 calculates the optimum shutter speed Tv (transfer shutter speed T _VT ) calculated by the CPU 41 in the hyper program exposure subroutine and the optimum aperture value Av (transfer aperture). Read the value A _VT ) and RAM43b
After setting (memory) at a predetermined address of (S309, S310). The transfer shutter speed T _VT and the aperture value A _VT stored in the RAM 43b are displayed on the LCD panel 69 and the viewfinder display unit 71 depending on the power hold condition.

When the Tv electronic dial 17 is being operated (when the Tv dial change bit is "1"), the hyper Tv flag is set, the hyper Av flag is set down, and the hyper EE automatic exposure mode is selected (S303). , S31
1). Then, the shutter speed Tv is changed according to the operation of the Tv electronic dial 17, the changed value is set to a predetermined address of the RAM 43b, and the fact that the hyper EE automatic exposure mode is set and the set shutter speed Tv are
LCD panel 69 and viewfinder display unit 71
Is displayed in the manner shown in FIG. 42G (S312, S313). The initial value of the set aperture value Av Av is a value calculated in the hyper program exposure mode or the hyper EE exposure mode. Further, a 3/4 circle surrounding the display "Tv" on the LCD panel 69, an acute-angled triangular arrow pointing to the left and right arranged above the display "Tv", and an underline of the display " 4oo " on the viewfinder display unit 71 are indicated by Tv. It is displayed that the shutter speed Tv can be changed by rotating the electronic dial 17.

Further, on condition that the CPU 41 is in the power-hold state, the CPU 41 reads the optimum aperture value Av calculated by the hyper EE automatic exposure subroutine (receives it at the time of communication), sets it in the RAM 43b, and displays it on the LCD panel 69 or the like. And return (S314, S315).

On the other hand, when the Av electronic dial 19 is being operated (when the Av dial change bit is "1"), the hyper Av flag is set and the hyper Tv flag is lowered to select the hyper ES automatic exposure mode ( S30
4, S316). Then, the aperture value Av is changed according to the rotation direction of the Av electronic dial 19, and the changed value is stored in the RAM.
43b, the hyper ES automatic exposure mode and the set aperture value Av are displayed on the LCD panel 69 or the like.
It is displayed in the manner shown in H (S317, S318). The initial value of the set aperture value Av is a value calculated in the hyper program exposure mode or the hyper EE exposure mode. In addition, a 3/4 circle surrounding the display "Av" on the LCD panel 69 and an arrow therebelow, and the display unit 7 in the finder.
The underline of the display " 8.o " of 1 indicates that the aperture value Av can be changed by rotating the Av electronic dial 19.

Further, if the CPU 41 is in power hold, the CPU 41 reads the optimum shutter speed Tv calculated in the hyper ES automatic exposure subroutine, sets the value in the RAM 43b, and displays it on the LCD panel 69 or the like (S319, S320). ).

The IPU 43 uses the electronic dial 17,
Even if neither 19 is operated, if the hyper EE or ES automatic exposure mode is selected (when the Hyper Tv or Av flag is already set), the CPU 41 executes the hyper ES or EE automatic exposure subroutine. Calculated optimum transfer shutter speed T _VT and aperture value A
_{The VT} is set in the RAM 43b and displayed on the LCD panel 69 or the like, but the aperture value Av or the shutter speed Tv is not changed (S303 to S305, S313 to S313).
315 or S303 to S306, S319 to S320).

With the above processing, when the hyper program exposure mode is selected, the photographer can change the hyper EE automatic exposure mode and select the shutter speed Tv by rotating the Tv electronic dial 17, and Av By rotating the electronic dial 19, the hyper ES automatic exposure mode can be changed and the aperture value Av can be selected. Further, in this embodiment, at the time of switching to another exposure mode, the optimum shutter speed or optimum aperture value Av calculated in the exposure mode before the switching.
Is the initial value of the exposure factor that can be set manually in the exposure mode after switching, and the exposure factor is changed by the next dial operation. However, the exposure factor is changed at the same time when the exposure mode is changed. May be

Further, by turning on the clear button 23, the hyper EE automatic exposure mode or the hyper ES automatic exposure mode is changed to the hyper program exposure mode, and the hyper electronic E is turned by rotating the Av electronic dial 19.
It is possible to change from the E automatic exposure mode to the hyper ES automatic exposure mode, and further to change the hyper ES automatic exposure mode to the hyper EE automatic exposure mode by rotating the Tv electronic dial 17. As described above, in this embodiment, when the hyper program exposure mode is selected, by operating the electronic dials 17 and 19 or the clear button 23, the diagram shown by the solid line, the alternate long and short dash line and the broken line in FIG. 10 can be easily obtained.

As already described in the explanation of the flow charts of FIGS. 33 and 34, the hyper Tv
, Av flags, when the clear button 23 is turned on (S261 to S263), when the hyper program exposure mode is selected in the mode selection process, when the main switch SWMAIN is turned off, and when the taking lens is removed. When it is released and then returned to the original state, the hyper program automatic exposure mode is initialized.

[Program Exposure Mode] When the normal program exposure mode is selected, "P" indicating that it is a program is displayed on the LCD panel 69 (S30).
1, S302, S321 to S323). Furthermore, CPU
When 41 is in power hold, CPU 41
Reads the communication data corresponding to the optimum shutter speed Tv and the optimum aperture value Av calculated by the program exposure subroutine and sets it in the RAM 43b, and the LCD panel 69
And the like in the manner shown in FIG. 42A (S324, S32).
5).

[Limited Program Exposure Mode] In the limited program exposure mode of the present embodiment, the photographer sets the upper and lower limits of the shutter speed and the aperture value, which change along the program diagram, by the electronic dials 17 and 19 and the hold switch. This is a kind of program exposure mode that can be changed by the operation of 25. When the limited program exposure mode is selected, a message to that effect is displayed on the LCD panel 69 by lighting 3/4 yen surrounding "Av" and "Tv" in the display mode of FIG. 41C (S461, S46).
2).

When the clear switch SWCL is turned on, the limit shutter speeds T _V1 , T _V2 and the limit aperture values A _V1 , A _V2 are initialized (S463-1, S4).
63-2). The initial values of the limit shutter speed and the limit aperture value in the present embodiment in the limited program exposure mode are the lower limit shutter speed T _V1 = T _VMIN = 3.
0 (second), upper limit shutter speed T _V2 = T _VMAX = 1/8000
(Seconds) and lower limit aperture value A _V1 = A _VMIN , upper limit aperture value A _V2
= A _VMAX . These initial values are set when the battery is loaded and the limited program exposure mode is first selected, but when the clear switch SWCL is turned off, the limit shutter speeds T _V1 and A _{V2 are set.}
And limit aperture values A _V1 and A _V2 without initializing the values
The process proceeds to checking the photometric switch SWS (S464). That is, the limit value set by the photographer by the following operation is initialized by turning on the clear button 23 (clear switch SWCL).

When the photometric switch SWS is turned on, or when the photometering switch SWS is turned off and the power is held, the process proceeds to S485 without doing anything (S464, S4).
65-1). Metering switch SWS is turned off and CP
When the power hold of U41 is turned off, the limit value is changed and the process proceeds to S485 (S46).
5-1, S465-2, S466 to S486). S48
At 5, it is checked whether the CPU 41 is in the power hold state, and if it is in the power hold state, the CPU 4 is held.
1 reads the optimum shutter speed Tv and the optimum aperture value Av calculated in the limited program exposure mode and RA
After setting to M43b and displaying on the LCD panel 69 etc., the process returns, and if the power is not held, the process returns without doing anything (S486).

The limit value changing process after S465-2 is executed as follows. First, Tv electronic dial 1
When 7 is operated, the limit shutter speed Tv is increased / decreased according to the operation status of the Tv electronic dial 17.
Then, the display is down and the setting process to the RAM 43b is performed (S465-2, S466).

Then, on condition that the hold button 25 is turned on, the upper and lower shutter speeds T _V1 and
Set T _V2 . That is, if the ON operation of the hold button 25 is the first or odd number of times, the ML mode flag is set, so the Tv value setting data is changed to the lower limit shutter speed T _V1 (S467 to S47).
0) If it is the second time or even time, the Tv value set data is changed to the upper limit shutter speed T _V2 and the process proceeds to S485 (S467, S468, S469, S472). If the hold button 25 is not turned on, nothing is changed (S467, S485).

On the other hand, when the Av electronic dial 19 is turned on, the limit aperture value changing process is performed in the same manner as the limit shutter speed Tv changing process. That is, according to the rotation direction of the Av electronic dial 19, the aperture value A
The up / down processing and display of v and the setting processing to the RAM 43b are performed (S475, S476). When the hold button 25 is turned on, the hold button 25 is turned on for the first or odd times (ML mode flag =
In the case of 1), the Av value set data is changed to the lower limit aperture value A _V1 . At the second time or even number of times (ML mode flag = 0), the Av value set data is changed to the upper limit aperture value A _V2 , and the process proceeds to S485. Go forward (S478, S479, S48
2).

The above limit shutter speeds T _V1 , T _V2 ,
When the processing for changing the limit aperture values A _V1 , A _V2 , etc. is completed, the CPU 41 reads the optimum shutter speed Tv and the optimum aperture value Av calculated in the limited program exposure mode on condition that the CPU 41 is in power hold. , RAM43b (S485, S4
86). The value set in this way is displayed on the LCD panel 6
It is displayed on 9th grade. In the limited program exposure mode, when the hold switch 25 is turned on,
The shutter speed and aperture value set by the photographer are changed to the upper and lower limit shutter speed and aperture value.
7, skip the processing of S477, the electronic dial 17, 1
The above limit value can be changed every time 9 is operated.

[LA ES automatic exposure mode] Body set aperture priority (ES) automatic exposure mode (Lens Auto E
When the S automatic exposure mode) is selected, the fact is displayed on the LCD panel 69 in the manner shown in FIG. 42D (S
301, S302, S321, S461, S331 to S
333). When the Av electronic dial 19 is rotationally operated, the aperture value Av that has been raised or lowered according to the operation is set in the RAM 43b as the set aperture value Av and displayed on the LCD panel or the like, and the CPU 41 is power-held. At the same time, the IPU 43 sends out the aperture value A _VT set in the aperture priority automatic exposure mode,
The CPU 41 reads the optimum shutter speed Tv calculated in the LA aperture priority exposure subroutine, sets it in the RAM 43b, and further displays it on the LCD panel 69 or the like (S334).
~ S338).

[LA EE automatic exposure mode] When the shutter priority (EE) automatic exposure mode is selected, that effect and the initial value (1/8000 seconds) of the shutter speed Tv are
It is displayed on the LCD panel 69 or the like in the manner shown in FIG. 42C (S301, S302, S321, S331, S341).
~ S343). When the Tv electronic dial 17 is rotationally operated, the shutter speed Tv that has been raised or lowered according to the rotational operation is set in the RAM 43b as the set shutter speed Tv and displayed on the LCD panel 69 or the like, and the CUP 41 holds the power hold. When the shutter speed priority automatic exposure mode is set to the CPU 41, the CPU 41 sends the shutter speed T _VT set in the shutter speed priority automatic exposure mode.
41 reads the optimum transfer aperture value A _VT calculated in the EE automatic exposure subroutine, sets it in RAM 43b, and sets LC
It is displayed on the D panel 69 or the like in the manner shown in FIG. 42C (S3
44-S348).

[Hyper manual exposure mode] In the hyper manual exposure mode of this embodiment, the clear button 2 is used.
By the operation of 3, the shutter speed Tv and / or the aperture value Av is a mode in which an effect equivalent to that calculated in the program exposure mode, the EE automatic exposure mode or the ES automatic exposure mode is obtained.

When the hyper manual exposure mode of the body set is selected, the LCD panel 6 indicates that.
9 and the like in the manner shown in FIG. 42E (S301, S3).
02, S321, S461, S331, S341, S3
79-S351). Then, the Ev check subroutine is executed to increase or decrease the shutter speed Tv and the aperture value Av according to the rotating operation of the electronic dials 17 and 19.
Is set in the RAM 43b and displayed on the LCD panel 69 or the like (S352).

Further, if the electronic dials 17 and 19 are rotationally operated, the shutter speed Tv or aperture value Av that has been raised or lowered according to the rotation is set, and if the power is held, the CPU 41 is set in the manual exposure mode. The CPU 41 outputs the selected shutter speed T _VT and aperture value A _VT , reads the fixed point LED bit calculated by the CPU 41 in the manual exposure subroutine of the body set, and sets it in the RAM 43a.
Lighting control of a and 71b is performed (S353 to S36).
0).

[LA valve exposure mode] When the valve exposure mode of the body set is selected, the fact is displayed on the LCD panel 69 in the mode shown in FIG. 42F (S).
301, S302, S321, S461, S331, S
341, S349, S361, S362). And A
v When the electronic dial 19 is being rotated, the aperture value Av that has been raised or lowered according to this rotation is set to RA.
It is set in M43b and displayed on the LCD panel 69 or the like (S363 to S365).

As described above, the body set has shutter priority,
In the aperture priority, manual and bulb exposure modes, the photographer can set the shutter speed Tv and the aperture value Av by rotating the electronic dials 17 and 19. In such a case, the LCD panel 69 displays "Tv" or "Av" together with the 3/4 circle and the triangle mark, and the in-viewfinder display unit 71 displays the shutter speed T.
Since an underline is displayed below the display of v or the aperture value Av, it can be visually and easily confirmed that the shutter speed Tv or the aperture value Av can be set by operating the electronic dials 17 and 19. Further, when the hold button 25 is turned on, the in-viewfinder display unit 71
Since the display element 71c ("*") lights up, it is sure that the memory is locked.

(In the case of lens manual) The exposure mode display in the case of lens manual in which the aperture is set on the photographing lens side is processed by the IPU 43 as follows.

[LM Hyper Manual Exposure Mode]
When the manual exposure mode is selected, the fact is displayed on the LCD panel 69 in the mode shown in FIG. 43A (S301, S371 to S373). If the Tv electronic dial 17 is rotationally operated, the shutter speed Tv that has been raised or lowered according to the operating direction is set in the RAM 43b as the set shutter speed Tv and displayed on the LCD panel 69 or the like (S374 to S376).

Further, if the CPU 41 is in power hold, the shutter speed Tv T _VT and the aperture value A _VT selected in the manual exposure mode are sent to the CPU 41, and the fixed point LED bit set by the CPU 41 in the LA manual exposure subroutine is sent. It is read and set in the RAM 43b, and lighting control of the exposure display elements 71a and 71b is performed (S377, S378). In FIG. 43A, (a) indicates that the exposure is proper, (b) indicates that it is overexposed, and (c) indicates that it is underexposed.

[LM manual ES automatic exposure mode]
When the lens manual aperture priority (ES) automatic exposure mode is selected, a message to that effect is displayed on the LCD panel 69.
It is displayed in the mode shown in FIG. 43B (S301, S381 to S383).
Then, when the CPU 41 is in power hold, the CPU 41 reads the shutter speed T _VT calculated in the ES manual exposure subroutine of the lens manual and RA
It is set in M43b, displayed on the LCD panel 69, etc. and returned (S384 to S385).

[LM Bulb Exposure Mode] When the bulb exposure mode of the lens set is selected, the shutter speed Tv is set to the bulb, and the LCD panel 6 indicates that fact.
9 in the manner shown in FIG. 43C (S301, S371, S3).
81, S391, S392).

[0199] [E _V check subroutine] Ev check of this embodiment locks the proper exposure value of the time when the hold switch 25 is turned on, then, when the electronic dial 17 and 19 were operated to rotate the operation The exposure factor (shutter speed or aperture value) of the selected one is raised or lowered according to the operation, while the other exposure factor (aperture value or shutter speed) is lowered or raised so that the locked exposure value does not change. Is. In the E _V check subroutine in S352, the hold button 25
Electronic dial 1 provided that is turned on.
7,19 is each time rotated by one step, to increase or decrease the shutter speed T _V and the aperture value A _V at _{1/2 T V, 1/2 A} V units. The operation of the E _V check subroutine,
This will be described in more detail with reference to FIG.

The hold bit corresponding to ON / OFF of the switch interlocking with the hold button 25 is RA of the IPU 43.
M43b is provided. First, if this hold bit is "0", the hold button 25 has not been turned on, so the already set shutter speed T _V and aperture value A _V are set and the process returns (S421, S421).
S437). When the hold bit is "1", that is, when the hold button 25 is turned on, the following processing is performed.

When the T _V electronic dial 17 is rotated leftward by one step (or more) (Tv change bit is “0”), the shutter speed T _V is T _V = −5 (30
Second) or the aperture value A _V is the maximum aperture value A _VMAX
In until subtracts the shutter speed T _V at 1/2 T _V units, and adds the aperture A _V in 1 / 2A _V units (S42
2 to S427). Even when the _AV electronic dial 19 is rotated to the right, the same processing as above is performed (S42).
2, S428, S429, S424 to S427).

When the T _V electronic dial 17 is rotated to the right, the shutter speed T _V is T _V = 13 (1/800
0 seconds) or the aperture value A _V is the minimum aperture value A
Until _VMIN, by adding the shutter speed T _V at 1/2 T _V units, and subtracts the aperture A _V at 1/2 A _V units (S4
22, S423, S430-S433). Even when A _V electronic dial 19 has been rotated to the left, the same subtraction processing as described above (S422, S428~S43
3). Then, the shutter speed T _V and the aperture value A _V that have been added and subtracted as described above are set in the RAM 43b, and the T _V and A _V dial change bits are reset and the process returns (S434 to S437).

By the above processing, by manually setting the proper shutter speed T _V and aperture value A _V and then turning on the hold button 25 once, any one of
The number of operation of the electronic dial 17 and 19, the exposure value E _V
Shutter speed T _V and aperture value A
Both _V can be changed at the same time. For example, in the hyper manual mode, assume that the shutter speed is 1/125 second and the aperture value F8.0 is the proper exposure value. When the hold button 25 is turned on in this state, the memory is locked first. Next, for example, by rotating the Tv electronic dial 17 in two steps, the shutter speed is changed to 1/60 seconds and the aperture is changed to F11 while the exposure value is fixed. This is apparently different from the fact that in the normal hyper manual exposure mode, when the Tv dial is operated, only the shutter speed value changes and the exposure level changes. Further, this mode is released by turning on the hold button 25 once more.

[Second Exposure Mode Display Processing] Next, the second exposure mode display operation will be described with reference to FIG. The difference from the first exposure mode display operation is that the electronic dials 17, 1 in the hyper program exposure mode are different.
The exposure mode does not change unless 9 is rotated for two steps or more.

When the hyper program is selected in the lens auto mode, neither of the electronic dials 17 and 19 has been rotated and the hyper T _V and A _V flags are both down. since exposure mode, set the hyper program exposure mode by clearing the hyper T _V flag and the hyper a _V flag, the display of the LCD panel 69 and the viewfinder display unit 71, to the embodiment shown in FIG. 42B (S501
~ S508). Then, on condition that the CPU 41 is in power hold, the transfer calculation shutter speed T _VT and the transfer aperture value A _VT calculated by the CPU 41 are input, and R
Set it in AM43b and return (S509, S510).

[0206] When the hyper EE automatic exposure mode is selected, the process proceeds from S505 so hyper T _V flag is set in S514, S311 in S514～S518 ~
The same processing as S315 is performed. On the other hand, since it is set Hyper A _V flag when the hyper-ES automatic exposure mode is selected, the process proceeds from S506 to S524, S524～
In S528, the same processing as S316 to S320 is performed.

When the T _V electronic dial 17 or the A _V electronic dial 19 is rotated, that is, when the T _V change bit or the A _V change bit is “1”, the T _V dial check and the A _V dial check subroutines are executed. Perform processing. The T _V , A _V dial check subroutine is a process in which the exposure mode is not changed unless the T _V , A _V electronic dials 17, 19 rotate in the same direction by two steps or more.

When the T _V electronic dial 17 or the A _V electronic dial 19 rotates by one step, or when it rotates by one step and then rotates by one step in the opposite direction, the process proceeds to S505 (S503, S511, S505 or S503,
S504, S521, S505).

When the T _V electronic dial 17 is rotated in the same direction by two steps, the process proceeds from S511 to S512. Here, when the Hyper T _V flag is down, the Hyper EE automatic exposure mode has not been selected yet, so only the change to the Hyper EE automatic exposure mode is possible, and the shutter speed T
Clear the T _V dial change flag to disable _V change, and then proceed to S514 (S512, S513, S514). Already hyper-E when the hyper-T _V flag is set
Since the E automatic exposure mode is selected, the process directly proceeds to S514 so that the shutter speed T _V can be changed (S512,
S514).

[0210] On the other hand, A _V electronic dial 19 is 2 in the same direction
After rotating by steps, the process proceeds from S521 to S522. here,
When the Hyper A _V flag is down, the Hyper ES automatic exposure mode has not been selected yet, so it is only possible to change to the Hyper ES automatic exposure mode.
The process proceeds to S524 to clear the A _V dial change flag in order to disable the change of _{V (S521, S522, S523,} S52
Four). Since already hyper ES automatic exposure mode is selected when the hyper A _V flag is set, the process directly proceeds to S524 to permit the change of the aperture value A _V (S5
21, S522, S524).

The T _V , A _V dial check subroutine of S511 and S521 will be described in more detail with reference to FIGS. 45 and 46. In the T _V dial check subroutine, it is first checked whether the T _V dummy flag is set (S551). Since it is not standing for the first time, the T _V dummy flag is set, the current T _V dial direction flag is set in the old T _V dial direction flag, and the process returns to S505 (S552). At the time of the second time, when the direction of rotation of the last time (the first time) T _V electronic dial 17 of the same, the current, old T _V
Since the contents of the dial direction flags are the same, the T _V dial dummy flag is set, the A _V dial dummy flag is lowered, and the process proceeds to S512 (S553, S555). On the other hand, at the second time,
When the direction of rotation of the T _V electronic dial 17 is different between when the first time, the current, the contents of the old T _V dial direction flag is different, T _V dial down the dummy flag, the current T _V dial direction flag the old T _V Put it in the dial direction flag and proceed to S505 (S551, S553, S554).

In the A _V dial check subroutine,
First A _V dummy flag is to check whether the stand (S561). Since it is not standing for the first time, the A _V dummy flag is set, the current A _V dial direction flag is set in the old A _V dial direction flag, and the process returns to S505 (S562). When the second time, and when the rotational direction when the first and A _V electronic dial 17 are the same, current, making a A _V dial dummy flag the contents of the old A _V dial direction flag is equal, T _V dial dummy Clear the flag and proceed to S524 (S563, S565). On the other hand, when the second process, when it is different from the rotational direction of A _V electronic dial 17 in the case of first time, now, the contents of the old A _V dial direction flag are different, the A _V dial dummy flag down, and the process proceeds to S505 to put the current a _V dial direction flag in the old a _V dial direction flag (S561, S563, S564).

As described above, according to the second display subroutine, the exposure mode does not change unless the electronic dials 17 and 19 are rotated by two steps or more. On the contrary, the exposure mode does not change. The electronic dials 17 and 19
It is also possible to adopt a configuration in which the forced change of the mode is not performed when is continuously rotated in a short time.

As described above, in this embodiment, when the hyper program exposure mode is selected, the electronic dial 1
7,19 by only rotating operation, changing the shutter speed T _V or aperture A _V corresponding to each of the rotational operation direction to change up and down, or the shutter speed priority AE mode or the aperture priority auto exposure mode You can After changing to automatic exposure mode, e-dial 1
Since the shutter speed or aperture value can be changed by the operations of 7 and 19, when the program exposure mode cannot sufficiently express the intention of the photographer, the automatic exposure mode can be easily changed to more easily express the intention of the photographer. be able to.

Furthermore, if the clear button 23 is turned on after the forced change to the automatic exposure mode, the initial hyper program exposure mode is returned, which is convenient when it is desired to temporarily select the automatic exposure mode in which the exposure factor is prioritized. .

As described above, in the present embodiment, the two automatic exposure modes, the normal program exposure mode and the hyper program exposure mode in which the exposure mode is prioritized by the operation of only the electronic dials 17 and 19, are provided. ,
The present invention may have a configuration in which only the hyper program exposure mode is provided, or a configuration in which more types of program exposure modes are provided.

As described above, in this embodiment, when the hyper program exposure mode is selected, the electronic dial 1
7,19 by only rotating operation, changing the shutter speed T _V or aperture A _V corresponding to each of the rotational operation direction to change up and down, or the shutter speed priority AE mode or the aperture priority auto exposure mode You can After changing to automatic exposure mode, e-dial 1
Since the shutter speed or aperture value can be changed by the operations of 7 and 19, when the program exposure mode cannot sufficiently express the intention of the photographer, the automatic exposure mode can be easily changed to more easily express the intention of the photographer. be able to.

Furthermore, when the clear button 23 is turned on after the forced change to the automatic exposure mode, the initial hyper program exposure mode is restored, which is convenient when it is desired to temporarily select the automatic exposure mode in which the exposure factor is prioritized. .

As described above, in the present embodiment, two automatic exposure modes, that is, the normal program exposure mode and the hyper program exposure mode in which the automatic exposure mode with the exposure factor priority can be changed by operating only the electronic dials 17 and 19, are provided. ,
The present invention may have a configuration in which only the hyper program exposure mode is provided, or a configuration in which more types of program exposure modes are provided.

[0220]

As described above, according to the present invention, when the specific program exposure mode is selected, the shutter speed or aperture value can be adjusted by operating the first or second manual setting means without changing the exposure mode. It can be easily changed based on the photographer's intention.

Furthermore, according to the present invention, when the specific program exposure mode is selected, it is possible to change to the corresponding shutter speed or aperture value priority automatic exposure mode by operating the first or second manual setting means. When the exposure mode is provided, it is very easy to change the exposure mode between the frequently used program exposure mode and the automatic exposure mode, and the operability is improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a single lens reflex camera to which the present invention has been applied.

FIG. 2 is a rear view of the main part of the embodiment.

FIG. 3 is a front view of a main part of the embodiment.

FIG. 4 is a block diagram showing a circuit configuration of the embodiment.

FIG. 5 is a flowchart relating to a main operation of the CPU.

FIG. 6 is a timing chart regarding CPU-IPU communication.

FIG. 7 is a flowchart regarding an automatic exposure mode.

FIG. 8 is a flowchart regarding error processing.

FIG. 9 is a flowchart of an embodiment of a hyper program exposure mode of the present invention.

FIG. 10 is a diagram of the same hyper program exposure mode.

FIG. 11 is a flow chart of an embodiment of a limited program exposure mode of the present invention.

FIG. 12 is a diagram of the limited program exposure mode.

FIG. 13 is a flowchart of an embodiment of a hypershutter speed priority automatic exposure mode of the present invention.

FIG. 14 is a flowchart relating to a second embodiment of the same hypershutter speed priority exposure mode.

FIG. 15 is a diagram showing an embodiment of the hypershutter speed priority automatic exposure mode of FIGS. 13 and 14;

FIG. 16 is a flowchart regarding an embodiment of a hyper aperture priority automatic exposure mode of the present invention.

FIG. 17 is a flowchart relating to a second embodiment of the same hyper aperture priority automatic exposure mode.

FIG. 18 is a diagram of the hyper aperture priority automatic exposure mode shown in FIGS.

FIG. 19 is a flowchart regarding an embodiment of a hyper aperture priority automatic exposure mode of the present invention.

FIG. 20 is a flowchart regarding an LA manual exposure mode.

FIG. 21 is a flowchart showing an LM manual exposure mode.

FIG. 22 is a flowchart regarding an LA valve exposure mode.

FIG. 23 is a flowchart relating to the LM valve mode.

FIG. 24 is a flowchart relating to LA hyper manual exposure mode.

FIG. 25 is a diagram showing an example of a hyper-per manual select flag.

FIG. 26 is a flowchart showing the main operation of the IPU.

FIG. 27 is a flowchart regarding communication between the IPU and the taking lens.

FIG. 28 is a flowchart relating to switch input processing.

FIG. 29 is a flowchart for Tv electronic dial processing.

FIG. 30 is a flowchart of Av electronic dialing processing.

FIG. 31 is a flowchart of processing for changing the aperture value Av by means of an Av electronic dial.

FIG. 32 is a flowchart relating to shutter speed changing processing by the Tv electronic dial.

FIG. 33 is a flowchart relating to mode shift processing.

34A],

FIG. 34B is a flowchart relating to exposure mode selection processing.

FIG. 35 is a flowchart of check processing.

[Fig. 36] Fig. 36 is a diagram illustrating a configuration example of data in a RAM in an IPU.

FIG. 37 is a flowchart of a memory lock process.

FIG. 38 is a diagram showing a configuration example of a memory lock flag in the RAM of the IPU.

FIG. 39A]

FIG. 39B]

FIG. 39C]

[FIG. 39D] FIG.

FIG. 39E]

FIG. 39F]

[FIG. 39G] FIG.

FIG. 39H is a flowchart relating to an example of display processing of the present invention.

FIG. 40 is a flowchart relating to Ev check processing of the present embodiment.

FIG. 41A],

FIG. 41B],

FIG. 41C],

41D],

FIG. 41E]

FIG. 41F is a diagram showing different initial display modes of the LCD panel and the in-finder display unit.

42A] FIG.

42B]

FIG. 42C]

42D]

FIG. 42E]

42F]

[FIG. 42G] FIG.

[Fig. 42H] Fig. 42H is a diagram showing a display manner of different exposure modes of the LCD panel and the in-finder display unit.

FIG. 43A],

FIG. 43B]

43C is a diagram showing a display manner of different exposure modes in the lens manual of the LCD panel and the display unit in the finder. FIG.

FIG. 44A]

FIG. 44B is a flowchart of the second example of the display process relating to the hyper program shown in FIG. 39A.

FIG. 45 is a subroutine relating to a second Tv dial check operation.

FIG. 46 is a subroutine relating to a second Av dial check operation.

[Explanation of symbols]

11 camera body 17 Tv electronic dial 19 Av electronic dial 23 Clear button 25 Hold button 41 CPU 41a ROM 41b RAM 43 IPU 43a ROM 43b RAM 45 shooting lens 69 LCD panel 71 Display unit in viewfinder

Continued front page    (72) Inventor Toshiyuki Kitazawa             2-36 Maeno-cho, Itabashi-ku, Tokyo Asahikou             Gaku Kogyo Co., Ltd. (72) Inventor Takayuki Izumi             2-36 Maeno-cho, Itabashi-ku, Tokyo Asahikou             Gaku Kogyo Co., Ltd. (72) Inventor Masato Yamamoto             2-36 Maeno-cho, Itabashi-ku, Tokyo Asahikou             Gaku Kogyo Co., Ltd. (72) Inventor Toshinasa Yamanaka             2-36 Maeno-cho, Itabashi-ku, Tokyo Asahikou             Gaku Kogyo Co., Ltd. (72) Inventor Tsunao Shishikura             2-36 Maeno-cho, Itabashi-ku, Tokyo Asahikou             Gaku Kogyo Co., Ltd. (72) Inventor Akio Takahashi             2-36 Maeno-cho, Itabashi-ku, Tokyo Asahikou             Gaku Kogyo Co., Ltd.

Claims (13)

[Claims] 1. A photometric means for measuring subject brightness; first and second manual setting means for independently setting a shutter speed and an aperture value as a pair of exposure factors; A specific program exposure mode that is automatically set according to the photometric value of the means; and when the first or second manual setting means is operated in the specific program exposure mode, the one exposure factor is set by the operation. An exposure factor changing means for changing the exposure factor to a specified exposure factor; and an exposure control device for a camera. 2. The exposure factor changing means according to claim 1, when the first or second manual setting means is operated in the program exposure mode, the priority exposure factor corresponding to the operation is first set to the above-mentioned. An exposure control device for a camera, which is set to a value determined according to a photometric value of a photometric means. 3. The priority exposure factor according to claim 2, when the first or second manual setting means is operated after the priority exposure factor is set by the exposure factor changing means. An exposure control device for a camera, which is changed. 4. The camera according to claim 1, further comprising a clear switch means, wherein the clear switch means cancels the setting of the priority exposure factor by operating the first and second manual setting means. Exposure control device for the camera. 5. A photometric means for photometrically measuring the subject brightness; first and second manual setting means for independently changing a shutter speed and an aperture value as a pair of exposure factors; A specific program exposure mode that is automatically set according to the photometric value of the photometric means; and an automatic exposure mode that enables manual setting of one of the pair of exposure factors and the other is automatically set according to the photometric value of the photometric means. An exposure mode selecting means for selectively selecting one of a plurality of exposure modes including the specific program exposure mode and an automatic exposure mode; and the specific program exposure mode being selected by the exposure mode selecting means. When the first or second manual setting means is operated, the shutter speed corresponding to the operation is Or the exposure mode forced changing means for forcibly changing the aperture value to the automatic exposure mode priority;
An exposure control device for a camera, comprising: 6. The exposure control apparatus according to claim 5, further comprising: when the first or second manual setting means is operated after the specific program exposure mode is forcibly changed to the automatic exposure mode. An exposure control device for a camera, comprising an exposure factor changing means for changing one of the exposure factors. 7. The exposure mode compulsory changing means according to claim 5 or 6, further, after the compulsory change to one of the automatic exposure modes by the operation of the first or second manual setting means, An exposure control device for a camera, characterized in that when the second or first manual setting means is operated, the other automatic exposure mode is forcibly changed. 8. The camera according to claim 5, further comprising a clear switch means, wherein the mode compulsory changing means operates the clear switch means after compulsorily changing from the specific program exposure mode to the automatic exposure mode. The exposure control device for a camera, wherein the exposure control device returns to the program exposure mode when the exposure is performed. 9. The camera according to claim 5 or 6, further comprising a program exposure mode different from the specific program exposure mode, wherein the mode compulsory changing means is operated when the specific program exposure mode is selected. An exposure control device for a camera, which executes the exposure mode forced change operation only. 10. The device according to claim 5, wherein the first and second manual setting means are rotatable.
An exposure control device for a camera, which is an electronic dial that is click-stopped in steps. 11. The exposure mode forced change means according to claim 10, wherein when the electronic dial is rotated by one step, the specific program exposure mode is forcibly changed to a corresponding automatic exposure mode. Exposure control device for camera. 12. The mode changing means according to claim 10, wherein the specific program exposure mode is changed to a corresponding automatic exposure mode when the electronic dial is rotated for two steps or more. Exposure control device for the camera. 13. The exposure factor changing means according to claim 11 or 12, when the specific program exposure mode is forcibly changed to any one of the automatic exposure modes according to a turning operation of the electronic dial. An exposure control device for a camera, characterized in that the shutter speed or aperture value is changed.