JPH08313957A - Camera - Google Patents

Abstract

PURPOSE: To prevent a failure picture from being taken by giving a warning when it is judged that shake cannot be corrected because shake speed is high or the shake is large when the shake is detected. CONSTITUTION: This camera is provided with an in-body microcomputer μC1 for executing the control action of a whole camera and the various kinds of arithmetic operation. A light receiving circuit for detecting a focus AFCT is provided with a CCD line sensor for detecting a focus with respect to an object within a range-finding range, the driving circuit of the CCD line sensor and a circuit for processing the output of the CCD line sensor, ADD-converting it and transmitting it to the microcomputer μC1 and connected to the microcomputer μC1 through a data bus. Besides, a microcomputer μC2 and a CCD area sensor X for detecting camera shake are included in a camera shake detection device BL incorporated in a camera body. According to the detected camera shake, image blurring is corrected. Besides, it is discriminated whether the shake can be corrected or not. Then, such a display that the shake cannot be corrected is executed by a warning means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a blur correction function.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a camera capable of correcting image blur by detecting camera blur during photographing and moving a part of a photographing lens according to the detected blur.

[0003]

However, when the shake is very large (the shake speed is fast and the shake amount is large), the correction capability of the camera cannot keep up with the result and a blurred photograph is produced. When taking a picture, it is worrisome for the photographer to know whether or not blur correction is possible.

[0004]

According to the camera of the present invention, in order to solve the above-mentioned problems, a camera shake detecting means for detecting camera shake and image shake correction according to the detected camera shake. It includes a blur correction unit, a determination unit that determines whether blur correction is possible, and a warning unit that displays that blur correction is not possible.

[0005]

According to the present invention, in a camera having a blur correction function, a failure photograph can be prevented by issuing a warning when the blur correction cannot be performed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A single lens reflex camera equipped with a zoom lens having a camera shake correction function will be described below as an embodiment of the present invention. 1 to 3 are block circuit diagrams of a camera. In the figure, μC1 is an in-body microcomputer (hereinafter referred to as “in-body microcomputer”) that controls the entire camera and performs various calculations.

The AF _CT is a light receiving circuit for focus detection, and processes a CCD line sensor for performing focus detection on an object within a range to be described later, a drive circuit for this CCD line sensor, and an output of the CCD line sensor. A /
A circuit for D-converting and transmitting to the in-body microcomputer μC1, and the in-body microcomputer μC via a data bus
It is connected to 1. This focus detection light receiving circuit AF _CT can obtain information regarding the amount of defocus of the subject within the range.

Reference numeral LM denotes a photometric circuit, which A / D converts a photometric value within a photometric range, which will be described later, and transmits it to the in-body microcomputer μC1 as brightness information. DX is a film sensitivity reading circuit provided in the film container to read the film sensitivity data and serially output the data to the in-body microcomputer μC1. The DISPC inputs display data and a display control signal from the in-body microcomputer μC1 and performs a predetermined display on the display section DISP _I (see FIG. 50) on the upper surface of the camera body and the display section DISP _II (see FIG. 51) in the finder. Display control circuit.

BL is a camera shake detection device built in the camera body, and includes a microcomputer μC2 and a camera shake detection CCD.
Includes area sensor X. The detailed configuration of the camera shake detection device BL will be described later. FLC is a flash circuit, which is built in the camera body in this embodiment.
The detailed configuration of the flash circuit FLC will also be described later.

X is a synchro contact (so-called X contact), which is turned on when the one-shutter movement of the shutter is completed and turned off when the charging of a shutter mechanism (not shown) is completed. LE is an in-lens circuit built in the interchangeable lens, which transmits information peculiar to the interchangeable lens to the in-body microcomputer μC1 and performs control for camera shake correction. The detailed configuration of the in-lens circuit LE will be described later.

M1 is an AF motor, which drives a focusing lens in the interchangeable lens via an AF coupler (not shown). MD1 is a motor drive circuit that drives the AF motor M1 based on focus detection information, and normal rotation / reverse rotation / stop is controlled by a command from the in-body microcomputer μC1. ENC is an encoder for monitoring the rotation of the AF motor M1, and outputs a pulse to the counter input terminal CNT of the in-body microcomputer μC1 at every predetermined rotation angle. The in-body microcomputer μC1 counts this pulse, detects the amount of extension from the infinity position to the current lens position, and detects the shooting distance of the subject from this amount of extension [number of extension pulses].

The TV _CT is a shutter control circuit that controls the shutter based on a control signal from the microcomputer μC1 in the body. The detailed configuration of the shutter control circuit TV _CT will be described later. AV _CT is a microcomputer in the body μC
1 is a diaphragm control circuit that controls a diaphragm based on a control signal from the control unit 1.

M2 is a motor for winding and rewinding the film and charging the shutter mechanism. MD2 is a motor drive circuit that drives the motor M2 based on a command from the in-body microcomputer μC1. WB
Is a white balance circuit, which detects the three primary color components of light and outputs R (red light) and G (green light) for B (blue light)
Ratio signals are calculated, converted into digital signals, and transmitted to the in-body microcomputer μC1. The detailed configuration of the white balance circuit WB will be described later.

Next, the structure related to the power source will be described.
E is a battery that serves as a power source for the camera body. Tr1 is a first power supply transistor that supplies power to part of the circuit described above. Tr2 is a second power supply transistor that supplies power for driving the motor in the lens, and
It has an S configuration.

V _DD is an operating power supply voltage of the in-body microcomputer μC1, the in-lens circuit LE, the camera shake detection device BL, the film sensitivity reading circuit DX, and the display control circuit DISPC.
V _{CC 1} is an operating power supply voltage of the focus detection circuit AF _CT and the photometry circuit LM, and is supplied from the power supply battery E through the power supply transistor Tr1 under the control of the power supply control signal PW1. V
_CC2 is the operating power supply voltage of the motor in the lens, and is supplied from the power supply battery E via the power supply transistor Tr2 under the control of the power supply control signal PW2. V _CC0 is a motor drive circuit MD1, a shutter control circuit TV _CT , an aperture control circuit A
V _{CT is} the operating power supply voltage of the motor drive circuit MD2, and is directly supplied from the power supply battery E. The motor drive circuit M
When a circuit with large current consumption such as D1 and MD2 operates,
The supply voltage from the power supply battery E may increase and the battery voltage may temporarily drop. Therefore, the backup capacitor CB is charged from the power supply battery E through the backflow prevention diode DB, and the power supply voltage V _DD is supplied from the capacitor CB to the microcomputer μC1 and the like.

Next, the switches will be described. S1 is a shooting preparation switch which is turned on by pressing the release button (not shown) in the first stage. When this switch S1 is turned on, an interrupt signal is input to the interrupt terminal INT1 of the microcomputer μC1 in the body, and auto focus (hereinafter referred to as “AF”).
,), Photometry, and display of various data.

S2 is pressed by pressing the second release button
It is a release switch that is turned on. When the switch S2 is turned on, the photographing operation is performed. S3 is a mirror-up switch that is turned on when the mirror-up is completed, and the shutter mechanism is charged and turned off when the mirror is down. S _M1 and S _M2 are selection switches for selecting the exposure mode, and are used to set any one of modes I, II, and III described later.

S _E is a battery mounting detection switch that is turned off when the battery E is mounted on the camera. When the battery E is mounted and the battery mounting detection switch S _E is turned off, the capacitor C1 is charged through the resistor R1 and the reset terminal RE1 of the in-body microcomputer μC1 is “Low”.
The level changes to the "High" level. As a result, the in-body microcomputer μC1 is interrupted, the built-in oscillator automatically operates, and the in-body microcomputer μC1 executes the reset routine shown in FIG.

Next, a configuration for serial data communication will be described. Photometric circuit LM, film sensitivity reading circuit DX, display control circuit DSIPC and camera shake detection device BL
Performs serial data communication with the in-body microcomputer μC1 via the signal lines of the serial input SIN, the serial output SOUT, and the serial clock SCK. And
The communication target with the in-body microcomputer μC1 is selected by the chip select terminals CSLM, CSDX, CSDISP, CSBL. That is, the terminal CSLM is "Low".
At the level, the photometric circuit LM is selected and the terminal CS
When DX is at "Low" level, the film sensitivity reading circuit DX is selected, and when terminal CDISSP is at "Low" level, the display control circuit DISPC is selected.
When the terminal CSBL is at "Low" level, the camera shake detection device BL is selected. Furthermore, the three serial communication signal lines SIN, SOUT, and SCK are connected to the in-lens circuit LE, and when the in-lens circuit LE is selected for communication, the terminal CSLE is set to "Low" level. is there.

Next, a detailed circuit configuration of the in-lens circuit LE incorporated in the interchangeable lens will be described with reference to FIG. This figure shows a camera shake correction lens NBL having a camera shake correction function.
The circuit configuration of FIG. In the figure, μC3 is an in-lens microcomputer that performs control for data communication with the camera body and camera shake correction.

M3 and M4 are pulse motors for driving the camera shake correction lens, and drive the camera shake correction lens in the k direction and the l direction, respectively, which will be described later. MD3, M
D4 is a motor drive circuit, which is a lens microcomputer μC3
Pulse motors M3 and M according to control signals from
4 is driven in the positive or negative direction. ZM is a zoom encoder for detecting the focal length of the zoom lens.
DV is a distance encoder that detects the amount of extension from the infinity position at each focal length. These are used to calculate the photographing magnification. The focal length data is also used to calculate the camera shake limit shutter speed.

V _CC2 is a power supply path to the motor drive circuits MD3 and MD4 and the two pulse motors M3 and M4, V _DD is a power supply path to a circuit other than the above, and GND2 is a motor drive circuit M
A ground line connected to D3, MD4 and the two pulse motors M3, M4, and GND1 is a ground line connected to circuits other than the above. The terminal CSLE is
This is an input terminal for an interrupt signal, and the microcomputer μC3 in the lens executes the interrupt LCSINT by the input of the interrupt signal from the camera side to the lens side. SCK is a clock input terminal for serial data transfer, SIN is a serial data input terminal, and SOUT is a serial data output terminal.

REIC is a reset circuit for resetting the in-lens microcomputer μC3 when the voltage V _DD supplied from the camera body becomes lower than the normal operating voltage of the in-lens microcomputer μC3. R3 and C3 are reset resistors and capacitors for resetting the in-lens microcomputer μC3. RE3 is the microcomputer in the lens μ
This is the reset terminal of C3, and the circuit L from the body to the lens
When the voltage V _DD for driving E is supplied and the terminal RE3 changes from the “Low” level to the “High” level by the resistor R3 and the capacitor C3, the lens microcomputer μC3 performs the reset operation.

S _LE is a lens mounting detection switch, which is turned off when the interchangeable lens is mounted on the camera body BD and the mount is locked. That is, when the interchangeable lens is removed from the camera body, the switch S _LE is turned on and both ends of the condenser C3 are short-circuited. As a result, the electric charge stored in the capacitor C3 is discharged,
The reset terminal RE3 of the microcomputer μC3 in the lens is “Lo
Then, when the interchangeable lens is attached to the camera body, the switch S _LE is turned off, the power source voltage V _DD charges the capacitor C3 via the resistor R3, and the time constants of the resistor R3 and the capacitor C3. After a lapse of a predetermined time determined by, the terminal RE3 changes to the "High" level, and the microcomputer .mu.C3 in the lens performs the reset operation as described above.

S _BL is a camera shake correction prohibiting switch. When the switch S _BL is turned on, camera shake correction is not performed,
The camera side also performs the normal AE program operation. As described above, the camera body BD and the in-lens circuit LE in this embodiment
After the explanation of the hardware of, the software will be explained next. Note that the detailed configurations of the camera shake detection device BL, the flash circuit FLC, the shutter control circuit TV _CT , and the white balance circuit WB will be appropriately described in the following software description as necessary.

First, the software of the in-body microcomputer μC1 will be described. When the battery E is attached to the camera body BD, the in-body microcomputer μC1 executes the reset routine shown in FIG. In this reset routine,
The in-body microcomputer μC1 resets various ports and registers (including flags) to stop (halt)
(# 5). In this stopped state, the oscillator built in the in-body microcomputer μC1 automatically stops.

Next, when the first stroke of the release button is pushed down, the photographing preparation switch S1 is turned on and "H" is given to the interrupt terminal INT1 of the microcomputer .mu.C1 in the body.
A signal that changes from the "high" level to the "Low" level is input, which causes the in-body microcomputer μC1 to operate as shown in FIG.
The interrupt INT1 shown in is executed. First, the in-body microcomputer μC1 sets the power supply control terminal PW1 to the “High” level and turns on the power supply transistor Tr1 to supply power to each circuit (# 10). After that, a signal changing from the “High” level to the “Low” level is output to the interrupt terminal S1INT of the microcomputer μC2 of the camera shake detection device BL (# 12).

Next, the lens communication A subroutine is executed to read the predetermined lens data (# 15). The lens communication includes a lens communication A for transmitting data from the lens to the body and a lens communication B for transmitting data from the body to the lens. FIG. 8 shows a lens communication A subroutine. When this subroutine is called, first, the terminal CSLE is set to the “Low” level to notify the in-lens microcomputer μC3 that data communication will be performed (#
150). Then, the 2-byte data is communicated with the lens (# 155). In the first byte, body status ICPB is transmitted from the body to the lens, and meaningless data FF _H (subscript “ _H ” means hexadecimal number) is transmitted from the lens to the body. Body status IC
The PB contains data indicating the type of body and the type of lens communication. The second byte is the lens status ICP
L is transmitted from the lens to the body, and meaningless data FF _H is transmitted from the body to the lens. The lens status ICPL is a type of lens (whether or not it is a camera shake correction lens) and a camera shake correction prohibition switch S _BL ON / OFF.
Contains data indicating. The microcomputer μC1 in the body determines whether or not the interchangeable lens is the camera shake correction lens NBL based on the data input from the lens. If the camera shake correction lens is 6 bytes, the data is 6 bytes, and if it is not the camera shake correction lens, 5 bytes. Input the data of each (# 1
60- # 170). Then, in order to indicate the end of the data communication, the terminal CSLE is set to the "High" level and the process returns (# 175). The third byte of the data input from the lens to the body is the focal length f, the fourth byte is the maximum aperture value AVo, the fifth byte is the maximum aperture value AVmax, and the sixth byte is the defocus amount DF, which is the number of rotations of the AF motor M1. The conversion coefficient K _L to be converted into the second data is the distance data. If the lens is not a camera shake correction lens, a total of 7 bytes of data up to this point is input. In the case of a camera shake correction lens, the data of the camera shake correctable amount is also input from the lens. This will be described later.

After the execution of the lens communication A subroutine in # 15 of FIG. 6, the in-body microcomputer μC1 determines whether or not the interchangeable lens is the image stabilizing lens NBL based on the input lens data (# 20). ). If it is a camera shake correction lens, set the power control terminal PW2 to "H".
The power supply transistor Tr2 is turned on at the "high" level, the power supply voltage V _CC2 is supplied to the in-lens circuit LE, and when the lens is not a camera shake correction lens, the power supply control terminal PW2 is set at the "Low" level and the power supply transistor Tr2 is OF.
Then, the supply of the power supply voltage V _CC2 to the in-lens circuit LE is stopped (# 25, # 30). Next, the AF subroutine is executed to perform the AF operation (# 35).

The AF subroutine is shown in FIG.
When this subroutine is called, it is first determined whether or not the flag AFEF indicating the focus is set (#
200). When the flag AFEF is set, it is determined that the focus state is already achieved, and the AF operation is not performed and the process returns. When the flag AFEF is not set, the CCD line sensor in the focus detection light receiving circuit AF _CT is integrated (charge accumulation), and after the integration is completed, A /
The D-converted data is dumped, the correlation calculation is performed based on the input data, and the defocus amount DF is calculated (#
205- # 220). Based on this defocus amount DF, it is determined whether or not it is in focus.
Set FEF and return (# 225, # 23
0). On the other hand, if it is not in focus, the flag AFEF is reset, the lens driving subroutine is executed, and the process returns (# 235 to # 240).

The lens driving subroutine is shown in FIG. When this subroutine is called, the in-body microcomputer μC1 multiplies the obtained defocus amount DF by the lens drive amount conversion coefficient K _L to calculate the rotation speed N of the AF motor M1, and determines whether or not the rotation speed N is positive. If yes, AF
A control signal is output to the lens drive circuit MD1 to rotate the motor M1 in the forward direction, and if negative, a control signal is output to the lens drive circuit MD1 to rotate the AF motor M1 in the reverse direction, and the process returns (# 245 to # 245). # 260).

Next, the flow of the counter interruption for driving the lens by the number of rotations N will be described with reference to FIG.
The counter interruption is executed every time a pulse is input from the encoder ENC for monitoring the rotation of the AF motor M1. In this interrupt, first, the microcomputer in the body μC
1 is a new value of | N |
|, And it is determined whether or not this | N | becomes 0 (#
280, # 285). If | N | = 0, the stop signal of the AF motor M1 is sent to the motor drive circuit MD1 for 10 msec.
After that, a control signal for turning off the AF motor M1 is output, and the process returns (# 290, # 295). ｜
If N | = 0 is not satisfied, the process immediately returns.

The AF subroutine is executed at # 35 in FIG.
After that, the microcomputer μC1 in the body detects the color temperature detection.
Execute Brutin (# 40). Detect this color temperature
FIG. 42 shows the configuration of the white balance circuit WB for
You Three light receiving elements PD_R, PD_G, PD_BOn the receiving surface of
Is R (red light), G (green light), B (blue light) respectively
Color filter F_R, F_G, F_BPlace
Signal indicating the light intensity of the three primary colors R, G, B
S_R, S_G, S_BTo obtain each signal by logarithmic compression circuit
It is logarithmically compressed. In the figure, the feedback impedance is
The operational amplifier connected with the ion is a logarithmic compression circuit.
It Then, the signal S is output by the differential amplifier in the subsequent stage._R, S
_BDifference of S_G, S_BBy taking the difference of each
Ratio signal S_R/ S _B, S_G/ S_BGet each prescribed
A / D conversion is performed in a cycle and transmitted to the microcomputer μC1 in the body
It Each signal S_R, S_G, S_BIs treated as logarithm
Then, the ratio signal is obtained by taking the difference with the differential amplifier.
be able to.

FIG. 13 shows a subroutine for color temperature detection (AWB: automatic white balance). When this subroutine is called, the in-body microcomputer μC1
The signal that has been A / D converted by the white balance circuit WB shown in FIG. 42 is input, and it is determined whether or not the light source is a fluorescent lamp (# 300, # 305). When the light source is a fluorescent lamp, the component of G (green light) becomes large and the ratio signal S _G
/ S _B is significantly larger. By detecting this, it is determined whether the light source is a fluorescent lamp. Then, if the light source is a fluorescent lamp, the flag FLLF is set, and if the light source is not a fluorescent lamp, the flag FLLF is reset, and each returns (# 310 to # 320).

When the color temperature detection subroutine is completed in # 40 of FIG. 6, the in-body microcomputer μC1 executes the AE calculation (automatic exposure calculation) subroutine (# 4).
5). The subroutine of this AE calculation is shown in FIG. When the subroutine is called, first, the in-body microcomputer μC1 changes the film sensitivity SV to the film sensitivity reading circuit D.
It is read from X by serial communication, and then the open photometric value BVo is read from the photometric circuit LM by serial communication (# 350, # 355). Then, the photometric value BV is BV =
The exposure value EV is calculated by BVo + AVo and EV = BV + SV
(# 360, # 365). Next, the in-body microcomputer μC1 obtains the camera shake limit shutter speed when the camera shake correction lens is not attached from 1 / f [sec] from the data of the focal length f [mm], and converts this to the apex value TVf1. (# 367). Similarly, the camera shake limit shutter speed when the camera shake correction lens is attached is calculated as 32 / f [sec], and this is converted into the apex value TVf2 (# 368). Here, it is considered that when the camera shake correction lens is attached, the camera shake limit shutter speed can be lowered to an exposure time that is 32 times as long as the normal time and an apex value of -5 EV.

Then, the exposure mode is determined according to the states of the selection switches S _M1 and S _M2 for mode selection, and the mode I (normal mode), mode II (portrait photographing mode), and mode III are determined according to the determination result. Execute each subroutine of (landscape shooting mode) and return (# 370 to # 39)
0). Before explaining the sub-routines of the above modes I, II, and III, the AE program diagram of each mode is shown in FIGS.
0 will be described.

FIG. 38 is an AE program diagram for mode I (normal mode). In this mode, with respect to the exposure value EV, the maximum aperture value AVo and TVf1 or TV are set from low brightness to the camera shake limit shutter speed TVf1 or TVf2.
The shutter speed TV is f2 or less. If the exposure value EV becomes larger than that, the shutter speed TV and the aperture value AV are distributed 1: 1 with respect to the exposure value EV. Then, when the aperture value AV reaches the maximum aperture value AVmax, the distribution is ended and only the shutter speed TV is changed. For flash photography, the shutter speed is T
It is performed when the brightness BV is less than 5 or less than Vf1 or TVf2.

FIG. 39 shows A in mode II (portrait photographing mode).
It is an E program diagram. In this mode, the shooting aperture value AV is set to the aperture value AVβ obtained from the shooting magnification β, the shutter speed TV is obtained from the obtained aperture value AV and the exposure value EV, and the aperture value AV is changed when the shutter speed exceeds TVmax. ing. Then, when the shutter speed TV is less than TVf1 or TVf2 or the brightness BV is less than 5, flash photography is performed. With the camera shake correction lens, the limit of the slow shutter speed in flash photography is TV = 2 (1/4 second in real time) or TV.
The larger f2 is set. It is natural that the lower limit of the camera shake limit shutter speed TVf2 is to prevent the camera shake, but the reason why the lower limit of TV = 2 is that the subject is not stationary during the photographing of a person, and the double image is not captured. This is because it is often a copy and it is not good because a shadow is created.
This is particularly problematic in flash photography, because the person to be photographed may move after the flash fires, judging that photography has been completed.

FIG. 41 shows a graph for determining the aperture value AVβ from the photographing magnification β. In FIG. 41, the horizontal axis represents the photographing magnification β and the vertical axis represents the aperture value AVβ. The scale on the vertical axis indicates the aperture value with an apex value, and the F number is also shown in parentheses. β ≧ 1/10
Then AV = 6 (F8) and 1/10> β ≧ 1/4
When 0, it is a value on a straight line connecting AV = 6 (F8) and AV = 4 (F5.6), and when 1/40> β ≧ 1/80, AV = 4 (or the maximum aperture value), 1/80> β ≧
When 1/160, AV = 4 (F4) and AV = 8 (F1
The value on the straight line connecting 6), and when 1/160> β, A
V = 8 (F16). When β> 1/20, the depth of field is increased by narrowing down a bit as macro photography,
When ≧ β ≧ 1/100, the depth of field is made shallow as a portrait (portrait shooting), and when β <1/100, it is gradually narrowed down until AV = 8 when β ≦ 1/160 as landscape shooting, and the field of view is reduced. You are getting depth. The present embodiment is provided with a data table for reading the photographing magnification β in this graph as an address and the aperture value AVβ as data.

FIG. 40 is an AE program diagram for Mode III (landscape photography mode). In this mode, in order to obtain the depth of field, the predetermined aperture value F11 (AV = 7) is set from the camera shake limit shutter speed TVf1 or TVf2 to the maximum shutter speed TVmax. And the exposure value E
The maximum shutter speed TV can be obtained from V
If it is faster than max, the aperture is changed from the predetermined aperture value (AV = 7) to the maximum aperture value AVmax while keeping TVmax. If the camera shake limit shutter speed TVf1 or TVf2 is less than or equal to the exposure value EV, the shutter speed TV is set to TVf1 or TVf2 and the aperture value A is set.
V from the predetermined aperture value F11 (AV = 7) to the maximum aperture value AV
Open to o. After opening the aperture to the maximum aperture value AVo, the shutter speed TV is further reduced. At this time, flash photography is not performed.

Next, the sub-routines of the above modes I, II and III will be described with reference to FIGS. First, the mode I subroutine shown in FIG. 15 will be described. When this subroutine is called, the microcomputer in the body μC
Reference numeral 1 determines whether or not the interchangeable lens is a camera shake correction lens, and if it is a camera shake correction lens, executes an AV / TV calculation subroutine that determines the aperture value AV and the shutter speed TV (# 400, # 405). ).

FIG. 17 shows the subroutine of the AV and TV calculations. When the subroutine is called, first,
The aperture value AV is calculated by AV = EV / 2−TVf2 + AVo (# 655). This aperture value AV is the maximum aperture value AVma
When x is exceeded, the maximum aperture value AVm is set as the aperture value AV.
ax is set, and when it is less than the minimum (open) aperture value AVo, the minimum aperture value AVo is set as the aperture value AV (# 6).
20- # 635). Then, the shutter speed TV is calculated by TV = EV-AV from the obtained aperture value AV and exposure value EV (# 640). If the shutter speed TV is equal to or lower than the maximum (fast) shutter speed TVmax, the process directly returns (# 645). Also, the shutter speed T
When V exceeds the maximum shutter speed TVmax,
Maximum shutter speed TVma for shutter speed TV
x is set and the aperture value AV is calculated again by AV = EV-TV (# 650, # 655). When the aperture value AV exceeds the maximum aperture value AVmax, the maximum aperture value AVmax is set as the aperture value AV, and the aperture value AV is the maximum aperture value AV.
If it is less than or equal to max, the process directly returns (# 66
0, # 665).

After the execution of the AV / TV calculation subroutine in # 405 of FIG. 15, the in-body microcomputer μC1
Determines whether the light source is a fluorescent lamp (FLLF = 1) (# 415). When the light source is a fluorescent lamp, the flash photographing FL1 subroutine is executed and the process returns (# 420). When the light source is a fluorescent lamp, it becomes greenish overall due to its color temperature, and the ratio of the amount of natural light to the amount of flash light is set to 1: 2 in order to prevent this and leave that feeling. It is controlled to (normally 1: 1).

FIG. 19 shows a subroutine of this flash photography FL1. When the subroutine is called, first, the control exposure value EV is set to EV = EV + 1.5, and the natural light component is set to 1.5 EV under (# 670). Then, it is determined whether the determined shutter speed TV exceeds the flash tuning maximum speed TVx (# 675). Here, the flash tuning maximum speed TVx is the TV with the apex value.
Let x = 8 (1/250 seconds in real time). When the shutter speed TV exceeds the flash synchronization maximum speed TVx in # 675, the flash synchronization maximum speed TVx is set as the shutter speed TV in # 680. If the shutter speed TV is less than the flash synchronization maximum speed TVx, nothing is done and the process proceeds to # 685. . In # 685, it is determined whether the shutter speed TV is less than the shake limit shutter speed TVf2. # 685
Shutter speed TV is the shake limit shutter speed TV
When it is less than f2, the control shutter speed T is set in # 690.
The camera shake limit shutter speed TVf2 is set as Vc, and when the camera shake limit shutter speed TVf2 or more, the shutter speed TV obtained as the control shutter speed TVc is set in # 695, and the process proceeds to # 700. In # 700, the aperture value AV is AV = EV-TVc
Ask in. When the calculated aperture value AV is less than the minimum aperture value AVo, the minimum aperture value AVo is set as the control aperture value AVc.
And the calculated aperture value AV exceeds the maximum aperture value AVmax, the maximum aperture value A is set as the control aperture value AVc.
Vmax is set, and when none of the above, the obtained aperture value AV is set as the control aperture value AVc (#
710- # 730). Then, SV = SV + so that the flash emission amount (dimming amount) is under 0.5 EV.
The flag FLF is set to 0.5 to indicate the flash photography, and the process returns (# 735, #
740).

Returning to the flow of FIG. 15, when it is determined in # 415 that the light source is not a fluorescent lamp (FLLF = 0),
In step # 455, it is determined whether the calculated shutter speed TV is less than the shake limit shutter speed TVf2. If the shutter speed TV is less than the camera shake limit shutter speed TVf2 in # 455, proceed to # 480.
Execute the flash photography FL2 subroutine (# 4
80).

The subroutine of this flash photography FL2 is shown in FIGS. In this subroutine, the ratio between the amount of natural light and the amount of flash light is set to 1: 1 so that the main subject is properly exposed and the background is 1 EV under. First, in # 750, 1 is added to the exposure value EV obtained by the calculation to set the control exposure value EV to 1EV.
Under In # 751, it is determined whether or not the interchangeable lens is the image stabilizing lens NBL. If the interchangeable lens is a camera-shake correction lens, the above-described AV / TV calculation subroutine is executed. If it is not a camera-shake correction lens, an AV / TV calculation subroutine described below is executed to determine the aperture value AV and shutter speed. The TV is calculated, and the process proceeds to # 755 (# 752, # 753). In # 755, it is determined whether or not the shutter speed TV obtained by the calculation exceeds the flash tuning maximum speed TVx. # 755
When the shutter speed TV exceeds the flash synchronized maximum speed TVx, the control shutter speed TVc is set in # 760.
Set the flash tuning maximum speed TVx as # 77
Go to 0. In # 755, if the shutter speed TV is equal to or less than the flash synchronization maximum speed TVx, proceed to # 762.
It is determined whether the interchangeable lens is the camera shake correction lens NBL. If the interchangeable lens is an image stabilization lens,
It is determined whether or not the shutter speed TV obtained by the calculation is less than the shake limit shutter speed TVf2 (# 7).
64). If the shutter speed TV is less than the camera shake limit shutter speed TVf2 in # 764, the camera shake limit shutter speed T is set as the control shutter speed TVc in # 766.
Set Vf2 and proceed to # 770. If the shutter speed TV is equal to or higher than the shake limit shutter speed TVf2 in # 764, the calculated shutter speed TV is set as the control shutter speed TVc in # 768.
Go to 0. When it is determined in # 762 that the interchangeable lens is not the camera shake correction lens, it is determined in # 767 whether or not the shutter speed TV is lower than the camera shake limit shutter speed TVf1. If the shutter speed TV is less than the camera shake limit shutter speed TVf1 in # 767, the camera shake limit shutter speed TVf1 is set as the control shutter speed TVc in # 769, and the process proceeds to # 770. In # 767, the shutter speed TV is the camera shake limit shutter speed TVf1
If the above is satisfied, the shutter speed TV obtained by calculation is set as the control shutter speed TVc in # 768, and
Go to 00. In step # 770, the control shutter speed TVc is subtracted from the exposure value EV to calculate the aperture value AV. When the aperture value AV is less than the maximum aperture value AVo, the maximum aperture value AVo is set to the maximum aperture value AVo.
When it exceeds max, the maximum aperture value AVmax is set, and when none of the above, the calculated aperture value AV is set as the control aperture value AVc, and the process proceeds to # 800 (# 775 to # 795). In # 800, the film sensitivity SV is set to SV = SV + 1, the flash light amount is set to 1 EV below the proper value, the flag FLF indicating flash shooting is set in # 805, and the process returns.

Returning to the flow of FIG. 15, when the shutter speed TV is equal to or higher than the shake limit shutter speed TVf2 in # 455, it is determined in # 460 whether or not the brightness BV is less than 5. If the brightness BV is less than 5 in # 460, the above-described flash photographing FL2 subroutine is executed in # 480, the contrast is controlled by the flash light, and the process returns. On the other hand, if the brightness BV is 5 or more in # 460, the shutter speed TV calculated as the control shutter speed TVc is set, the aperture value AV calculated as the control aperture value AVc is set, and the process returns (# 465). , # 470).

If the interchangeable lens is not the camera-shake correction lens in # 400, an AV / TV calculation subroutine (see FIG. 17) is executed (# 425). In this subroutine, the aperture value AV is set to AV = EV / 2-T in # 660.
Obtained by Vf1 + AVo, the process proceeds to # 620. Since the following has already been described, it will be omitted. After obtaining the aperture value AV and the shutter speed TV in # 425, it is determined in # 430 whether or not the brightness BV is less than 5. If the brightness BV is less than 5 in # 430, the flash photographing FL2 subroutine is executed in # 480 and the process returns. If the brightness BV is 5 or more in # 430, it is determined in # 435 whether or not the shutter speed TV is lower than the shake limit shutter speed TVf1. If the shutter speed TV is lower than the camera shake limit shutter speed TVf1 in # 435, the subroutine of the flash photographing FL2 is executed in # 480 and the process returns. If the shutter speed TV is equal to or higher than the shake limit shutter speed TVf1 in # 435, the calculated shutter speed TV and aperture value AV are set as the control shutter speed TVc and the control aperture value AVc, and the process returns (# 465, # 470). ). In this case, natural light photography is performed.

Next, FIG. 16 shows a subroutine of mode II (portrait photographing mode). When this subroutine is called, first, the photographing magnification β (size of the main subject occupying the photographing screen) is obtained from the distance data and the focal length data input from the lens (# 500). Then, based on the graph shown in FIG. 41, the aperture value AVβ is obtained from the data table using the photographing magnification β as an address, and the aperture value AVβ is calculated.
V (# 505, # 510). Next, it is determined whether or not this calculated aperture value AV is less than the maximum aperture value AVo (# 515). If the calculated aperture value AV is less than the open aperture value AVo, the open aperture value AVo is set as the calculated aperture value AV in # 520, and if it is equal to or larger than the open aperture value AVo, # 5.
Skip 20 and proceed to # 525. In the person photographing mode, since flash photographing is performed, it is determined in # 525 whether or not the camera shake limit shutter speed TVf1 exceeds the flash synchronization maximum speed TVx.
In # 530, the flash synchronization maximum speed TVx is set as the camera shake limit shutter speed TVf1, and when it does not exceed the limit, the process skips # 530 and proceeds to # 535. In # 535, to make the background 1EV under,
The exposure value EV is EV = EV + 1. And # 540
Then, the shutter speed TV is calculated by TV = EV-AV. In # 545, it is determined whether or not the calculated shutter speed TV exceeds the flash synchronization maximum speed TVx. If it exceeds, the flash synchronization maximum speed TVx is set as the control shutter speed TVc in # 550, and the flash shooting is performed in # 555. The subroutine of FL3 is executed and the process returns. This flash photography FL3 subroutine is shown in FIG.
1 and the flow after # 770. Here, assuming that the exposure value is not appropriate at the above-described aperture value AV = AVβ,
The aperture value AV is redetermined. If the calculated shutter speed TV is equal to or less than the flash tuning maximum speed TVx in # 545, the process proceeds to # 560, and it is determined whether or not the interchangeable lens is the image stabilizing lens NBL. If the interchangeable lens is the camera-shake correction lens in # 560, it is determined in # 565 whether the calculated shutter speed TV is less than the camera-shake limit shutter speed TVf2. Shutter speed TV calculated with # 565
Is less than the camera shake limit shutter speed TVf2, #
At 570, the camera shake limit shutter speed TVf2 is set as the control shutter speed TVc, and at # 555, the flash photographing FL3 subroutine is executed. With # 565, the calculated shutter speed TV is the camera shake limit shutter speed TVf
If it is 2 or more, the calculated shutter speed TV is set as the control shutter speed TVc, and the calculated aperture value AV is set as the control aperture value AVc (# 585, # 590). Further, the film sensitivity SV is set to SV = SV + 1, and the flash light amount is set to 1 EV under (# 595). Further, a flag FL is displayed to indicate that the flash photography is performed.
Set F and return (# 600). # 560
If the interchangeable lens is not an image stabilizer lens in,
At 575, it is determined whether the calculated shutter speed TV is less than the shake limit shutter speed TVf1. # 575
If the calculated shutter speed TV is less than the camera shake limit shutter speed TVf1, the camera shake limit shutter speed TVf1 is set as the control shutter speed TVc in # 580, and the subroutine of the flash photography FL3 is executed in # 555. On the other hand, if the calculated shutter speed TV is equal to or higher than the shake limit shutter speed TVf1 in # 575, # 5
The process of 85 to # 600 is executed, and the process returns.

Next, the subroutine of mode III (scenery photographing mode) will be described with reference to FIG. When this subroutine is called, first, the aperture value AV is set to A in # 602.
V = 7, shutter speed TV is TV = E in # 604.
Calculate with V-AV. Then, in # 605, it is determined whether or not the interchangeable lens is the image stabilizing lens NBL. #
If the interchangeable lens is an image stabilization lens in 605, #
At 606, it is determined whether TV ≧ TVf2, and TV ≧ TVf
If not 2, the aperture value AV is set to AV = EV-T in # 610.
It is calculated by Vf2 + AVo. If the interchangeable lens is not a camera shake correction lens in # 605, TV ≧ TVf in # 608.
It is determined whether or not 1, and if TV ≧ TVf1, # 61
In step 5, the aperture value AV is calculated by AV = EV-TVf1 + AVo, and the process proceeds to # 620. The processing after # 620 (control for natural light imaging) is the same as described above, and therefore description thereof is omitted. Note that in # 606 TV ≧ TVf
2 or when # 608 and TV ≧ TVf1, #
Proceed to 645.

Returning to the flow of FIG. 6, when the execution of the AE calculation subroutine is completed at # 45, the microcomputer in the body μ
C1 outputs # to the camera shake detection device BL,
At 50, the data communication I subroutine is executed. The subroutine of this data communication I is shown in FIG. When this subroutine is called, first the microcomputer in the body μC1
Prohibits the interrupt DEINT from the camera shake detection device BL,
The terminal CSBL is set to the “Low” level, serial communication is performed four times (for four bytes), and four bytes of data are output to the camera shake detection device BL (# 900 to # 910). This 4-byte data is the focal length f, the control shutter speed TVc, the type of lens, and the presence / absence of focusing. After outputting these data, the terminal CSBL is set to "High".
Set the level and interrupt DEINT from the camera shake detection device BL
And returns (# 915, # 920).

In the microcomputer μC2 of the camera shake detection device BL, the terminal CSBL of the in-body microcomputer μC1 is "High".
26. The interrupt CSBL is executed in response to the signal changing from the “h” level to the “Low” level. This will be described with reference to FIG. The flag DTF indicating that the execution has been executed is set and the process returns (# 110).
5, # 1110).

Here, the detailed structure of the camera shake detection device BL will be described. FIG. 45 shows a range of camera shake detection (image shake detection) occupied in the photographing screen S. In the figure, Sa is a distance measuring range by the focus detection light receiving circuit AF _CT , and Sb is
Shake detection by the shake detection device BL (image shake detection)
And Sc is the photometric range by the photometric circuit LM.

FIG. 46 is a block circuit diagram of the camera shake detection device BL. The μC2 is a microcomputer that performs calculation for hand-shake detection and its sequence control (particularly data communication with the microcomputer μC1 in the body and integration control of the CCD area sensor X). X is a two-dimensional CCD area sensor having 24 pixels in the vertical direction and 36 pixels in the horizontal direction, which has the same ratio as the 35 mm film size. Each surface element has a light receiving section, a storage section, and a transfer section, and the accumulated charge of the storage section changes according to the photocurrent obtained by the light receiving section. The accumulated charge obtained in the accumulation section of each pixel is read out serially by the transfer section,
The data is input to the data input section DT of the microcomputer μC2. The data input section DT of the microcomputer μC2 is provided with an A / D conversion section, which converts an analog signal output from the CCD area sensor X into a digital signal and stores it in a built-in memory. MPD is a light receiving element for monitoring, SWa, S
Wb is a switch element, Ca is a capacitor, CMP is a comparator, and these are the CCD area sensor X.
Is provided to control the integration time of. Terminal IN
ST is a terminal that outputs an integration start signal, which outputs an integration start signal that is at the “High” level for a predetermined time and turns on the switch elements SWa and SWb for a predetermined time. When the switch element SWa is turned on for a predetermined time, the initial voltage of the capacitor Ca is set to the power supply voltage V _DD . Further, by turning on the switch element SWb for a predetermined time, the initial voltage of the storage section of each pixel of the CCD area sensor is set to the power supply voltage V _DD . Terminal INE
N is a terminal for inputting an integration end signal, and is a monitor light receiving element MPD after the switch elements SWa and SWb are turned off.
When the voltage of the capacitor Ca discharged by the photocurrent of 2 becomes equal to or lower than the reference voltage Va, the output of the comparator CMP becomes the “High” level, and this becomes the integration end signal. The terminal INEND is a terminal for outputting an integration end signal, and a signal for stopping the integration operation of the CCD area sensor X is output when the output of the comparator CMP becomes “High” level or when a predetermined time has elapsed. It

FIG. 25 shows a flow chart of the microcomputer μC2 which controls the camera shake detecting device BL. From the “High” level to “Low” by the microcomputer μC1 in the body
To level or from "Low" level to "High"
When the signal that changes to the level is input to the interrupt input terminal S1INT of the microcomputer μC2, the microcomputer μC2 operates as shown in FIG.
The S1INT interrupt shown in is executed. First, # 1001
Then, by detecting the level of the input terminal P1 of the microcomputer μC2, it is determined whether or not the interrupt input terminal S1INT is at the “Low” level. Interrupt input terminal S1I at # 1001
When it is determined that NT is at the “High” level, the free-run timer TA is stopped in # 1002,
When the camera has finished shooting, the microcomputer μC2 is stopped. If it is determined in # 1001 that the interrupt input terminal S1INT is at the “Low” level, # 10
Start the free-run timer TA at 03. This free-run timer TA operates without stopping until the camera finishes shooting. Then, assuming that the image capturing by the camera is started, the flag DTF indicating the data communication I is reset in # 1004, and the integration control subroutine of the CCD area sensor X is executed in # 1005.

FIG. 27 shows a subroutine of the integral control. When this subroutine is called, first, the integration start time is read from the free-run timer TA, the read time is stored as A1, and the time A21 required from the previous integration end time to the current integration start time is set to A21.
= A1-A2 (# 1150, # 1151). Then, the switch element SW is set by setting the terminal INST for outputting the integration start signal to the “High” level for a certain period of time.
a and SWb are turned on for a certain period of time to reset the capacitor Ca discharged by the photocurrent of the monitor light receiving element MPD to the power supply voltage V _DD, and the storage unit of each pixel of the two-dimensional CCD area sensor X is supplied with the power supply voltage. By resetting to _VDD and setting the terminal INST to the “Low” level after a fixed time, the switch elements SWa and SWb are turned to O level.
As FF, integration is started (# 1152). Then, in # 1155, the timer TB is reset and started. In # 1160, the terminal INE for detecting the end of integration is
Wait for N to go to "High" level
When the signal goes to the "High" level, #
Move to 1170. In # 1160, the terminal INEN becomes "H".
If it does not reach the "high" level, the timer TB keeps counting the predetermined time T1 at # 1165, and if the predetermined time T1 has passed, the process proceeds to # 1170 to end the integration, and the predetermined time T1 has passed. If not, the process returns to step # 1160. In step # 1170, the terminal INEND is momentarily set to “High.
At the h ″ level, the charge in the storage portion of each pixel in the CCD area sensor X is transferred to the transfer portion. When the integration is completed, the integration end time is read from the free-run timer TA, and the read time is stored as A2, The previously calculated integration time A12 is stored as LA12 (# 1172, # 1174), and the current integration time A12 is calculated by A12 = A2-A1 and the arithmetic mean TM12 of the current and previous integration times is TM12 = ( A12 to LA1
2) / 2, and returns (# 1176, # 11
78). The meaning of this calculation will be described later.

When the integration of the CCD area sensor X is completed at # 1005 in FIG. 25, the charge is accumulated in the accumulation portion of each pixel of the CCD area sensor X according to the brightness of each pixel. Next, the microcomputer μC2 returns # 1007.
The data dump subroutine is executed to dump the charge information (integrated data) accumulated for each pixel of the CCD area sensor X, convert it into digital data by the internal A / D converter, and store it in the memory.

FIG. 28 shows the subroutine of this data dump.
Shown in When this subroutine is called, the image data a '(16,
11) to a '(21, 14) are converted to a (1, 1) to a (6,
4) The memory is re-stored as the reference portion data (# 1).
180). Then, the current image data that has been A / D converted is stored as a '(1, 1) to a' (36, 24) and used as reference portion data (# 1185). In FIG. 47, the reference parts a (1,1) to a (6,4) and the reference part a '(1,1) are shown.
~ A '(36, 24) is shown.

After the execution of the data dump subroutine in # 1007 of FIG. 25, the microcomputer μC2 returns to # 10.
In step 10, it is determined whether or not the flag DTF indicating data input is set. If not set, # 10
Returning to 05, integration and data dump are performed again. # 101
If the flag DTF is set to 0, it is determined whether or not the focus is achieved by the input data from the in-body microcomputer μC1. If not, the variable N is set to 0, Returning to # 1005, integration and data dump are performed again (# 1015, # 1020).

When the image is not in focus, the camera shake detection (image shake detection) is not performed. When two images which are out of focus are compared with each other in a defocused state, i) Since the contrast is low, accurate image data cannot be obtained, and even if two images are compared, accurate camera shake detection cannot be performed. Therefore, the accuracy of the camera shake detection amount becomes low. (Ii) When the photographic lens is driven to focus, the image changes, and it may be detected as an image blur even when the image blur due to the camera shake does not actually occur. The problem arises.

On the other hand, if the subject is in focus at # 1015, 1 is added to the variable N and it is determined whether or not this variable N is 2 or more. If it is less than 2, correction is performed to prohibit camera shake correction. Set the prohibition flag CIF and proceed to # 1005 (#
1030 to # 1040). This is because at the time of performing camera shake detection (image shake detection), at least image data serving as a standard portion and image data serving as a reference portion are required, and for that purpose, the variable N must be 2 or more. # 10
When the variable N is 2 or more in 35, the correction prohibition flag CIF is reset in # 1050 to allow the camera shake correction, and the camera shake amount calculation subroutine is executed in # 1055.

FIG. 29 shows a subroutine of this camera shake amount calculation.
Shown in When the subroutine is called, first the correlation function

[0063]

[Equation 1]

, K = 0, 1, ..., 30, l = 0, 1,
, 20 are calculated (# 1200). This means that the image data a (i, j) of the standard portion is compared with the image data a ′ (i + k, j + 1) of the partial area in the reference portion having the same size. The correlation function d (k,
l) is calculated for k = 0, 1, ..., 30, l = 0, 1, ..., 20 to shift the image data of the standard portion by one pixel in the horizontal and vertical directions with respect to the reference portion. While making comparisons. Next, the correlation function d
The minimum value of (k, l) is calculated, and the shift amount (k, l) that gives this minimum value is calculated (# 1205). As shown in FIG. 47, the shift amount (k, l) when the image data a (i, j) of the standard portion matches the image data of the partial areas of the same size in the central portion of the reference portion is (15,10). Therefore, the displacement direction (vector) when the image data a (i, j) of the standard portion matches the image data of the partial area of the same size at an arbitrary position of the reference portion is (Δ)
k, Δl) = (k, l) − (15,10), and the shift amount is calculated as P = (Δk ² + Δl ² ) ^1/2 (# 1210, # 1215). After the above calculation, the calculation end time is read from the free-run timer TA, the read time is stored as A3, and the integration end time A2
From the calculation end time A3 to A23 = A23 = A
3-A2 is calculated, and the time A31 from the previous calculation end time LA3 to the current integration start time A1 is obtained (#
1220 to # 1230). Then, it is determined whether N = 2. If N = 2, the time T from the previous integration center to the current integration center is calculated as T = TM12 + A21,
If N = 2, T = TM12 + LA23 + A31 is calculated (# 1235- # 1245).

This time T will be described with reference to FIG.
First, when N = 2, as can be seen from the flowchart of FIG. 25, integration, data dump, integration, data dump, and calculation are performed, and the time T from the previous integration center to the current integration center is t in FIG. It can be seen that it is between _{1 and} t ₂ . The time from the time t ₁ when the image is formed by the previous integration to the previous integration center, and the time from the integration to the end of the previous integration is
(LA2-LA1) / 2 = LA12 / 2. That is, it is half the previous integration time. The time of the previous data dump is A21 = A1-LA2 (A in the flowchart
2). Time t ₂ when an image is formed by this integration
Is the center of the integration this time, and the time from the start of the integration this time to the center t ₂ of the integration is half the integration time of this time A12 /
2 = (A2-A1) / 2. Therefore, the time T from the previous integration center to the current integration center is T = (A1
2 + LA12) / 2 + A21 = TM12 + A21.

Next, when N> 2, the time required for the calculation and the time required for the data transfer (the time for outputting the data from the microcomputer μC2 of the camera shake detection device BL to the microcomputer μC1 in the body) are always entered. The time T from the center of integration to the center of integration this time is between t ₂ and t _{3 in} FIG. 16, and T = (LA2-LA1) / 2 + (LA3-LA2)
+ (A1-LA3) + (A2-A1) / 2 = TM12 +
It becomes LA23 + A31.

Next, the microcomputer μC2 divides the camera shake amount P obtained as described above by the time interval for obtaining image data for camera shake detection to obtain the camera shake amount per unit time, that is, the camera shake speed Q = P. / T is calculated (# 1255). Then, the previous calculation end time A3 is stored as LA3, the time A23 from the previous integration end time A2 to the calculation end time A3 is stored as LA23, and the process returns (# 1260, # 1265).

After the subroutine for camera shake amount calculation is completed in # 1055 of FIG. 25, the microcomputer μC2 returns to # 10.
At 60, it is determined whether or not the interchangeable lens is the image stabilizing lens NBL. If the interchangeable lens is not a camera shake correction lens in # 1060, a camera shake determination subroutine is executed in # 1070 to determine whether or not there is a risk of camera shake, and the process returns to # 1005. On the other hand, if the interchangeable lens is the image stabilizing lens in # 1060, # 107
Go to 5. In # 1075, the terminal CSBL is set to the “Low” level, and the microcomputer μC1 in the body is interrupted for data transfer. Then, in # 1080, the data communication II subroutine is executed, and 6-byte data (deviation amount Δ
k, Δl, camera shake warning signal, integration time TI, camera shake speed Q, correction start signal, sum of integration time and calculation time T) are output to the in-body microcomputer μC1. After that, # 1085
Then, the terminal CSBL is set to "High" level, and # 1005
Return to

Next, FIG. 30 shows a subroutine for camera shake determination.
Shown in When this subroutine is called, first, the camera shake speed Q is multiplied by the exposure time Ts (real time) to obtain this value Q.
It is determined whether xTs is less than a predetermined value K1 (# 128).
0). Here, the reason why the camera shake speed Q is multiplied by the exposure time Ts is that the camera shake amount increases as the exposure time Ts increases. If it is less than the predetermined value K1, the flag WNGF for warning of camera shake is reset, and if it is more than the predetermined value K1, this flag WNGF is set and the process returns (# 1285, # 1290). If the interchangeable lens is an image stabilization lens, the microcomputer in the lens μ
The camera shake determination and camera shake correction are performed by C3, and a signal indicating whether or not a camera shake warning is present is sent to the body. This point will be described later.

Next, the operation of data transfer from the camera shake detection device BL to the in-body microcomputer μC1 will be described.
When the internal microcomputer μC1 receives a signal that changes the terminal CSBL of the camera shake detection device BL from the “High” level to the “Low” level, the interrupt DEIN shown in FIG.
Execute T. In this interrupt, first, at # 940, the data communication II subroutine is executed to detect the camera shake detection device BL.
Input the 6-byte data sent from. Then, in # 945, the interchangeable lens is the image stabilizing lens NBL.
If it is a camera-shake correction lens, the lens communication B subroutine is executed at # 950, and if it is not a camera-shake correction lens, # 950 is skipped and the process returns. .

Data communication with the above-mentioned camera shake detection device BL
The subroutine II is shown in FIG. When this subroutine is called, the in-body microcomputer μC1 also has the terminal CSBL.
Is set to “Low” level, the serial communication clock is output from the microcomputer μC1 in the body, and in synchronization with this,
6 bytes of data serially output from the microcomputer μC2 of the camera shake detection device BL are input, the terminal CSBL is set to the “High” level, and the process returns (# 960 to # 960).
# 970).

Next, the above-mentioned lens communication B subroutine is shown in FIG. When this subroutine is called, the in-body microcomputer μC1 sets the terminal CSLE to the “Low” level in order to indicate communication with the lens, and first,
2 bytes of data is input from the lens side, serial communication is performed to output 2 bytes of data at the same time, then 7 bytes of data are output, and terminal CSLE is set to "H".
Then, the data transfer is completed by setting the "high" level (# 185).
~ # 197). As the 7-byte data, the shake correction amounts Δk and Δl, the shake correction start signal / end signal,
Presence / absence of release signal and microcomputer stop signal, control shutter speed, integration time TI of CCD area sensor in camera shake detection device BL, moving speed Q of image shake, and sum T of integration time and calculation time of CCD area sensor
There is.

Next, a flow chart for controlling the microcomputer .mu.C3 in the lens (particularly lens control for camera shake correction) will be described with reference to FIGS. The lens is mounted on the body, and the lens mounting detection switch S _LE is switched from ON to OFF
Or the voltage V _DD supplied from the body to the lens rises above the operating voltage and the reset circuit R
When the EIC detects, the reset terminal RE3 of the microcomputer μC3 in the lens is changed from "Low" level to "High".
A signal changing to the level is input, and the in-lens microcomputer μC3 executes the reset routine shown in FIG. 32 to reset the port and the register and stop. It should be noted that, when an interrupt is generated from the stopped state, the clock oscillation is automatically started by the oscillator built into the microcomputer μC3, and the control that automatically stops the clock oscillation when the operating state is changed to the stopped state. Is to do.

When a signal that changes from the "High" level to the "Low" level is input from the in-body microcomputer μC1 to the terminal CSLE of the in-lens microcomputer μC3, the interrupt routine LCSINT shown in FIG. 33 is executed. First, 2 bytes of data is input / output, and it is judged from the body status ICPB obtained by this data communication whether or not the lens communication is A. If the lens communication is A, 5 bytes of data is converted into a serial communication clock. Is output in synchronism with the above, and the state becomes the waiting state for the interrupt (# L5 to # L15).

If the lens communication is not A in # L10, it is determined that the lens communication is B, the flow proceeds to # L11, 6 bytes of data is input, and it is determined whether or not the stop signal of the microcomputer μC3 is set. Stop if there is (#
L11, # L12). When the stop signal of the microcomputer μC3 is not set, the process proceeds to # L13, and it is determined whether or not the release is completed. The signal for determining whether or not the release is completed is input from the in-body microcomputer μC1 in the lens communication B when the release is completed (see # 1325 described later). If the release is completed in # L13, # L1
In step 4, the flag RLF indicating that the shutter is being released is reset, and in order to return the lens moved for camera shake correction to the initial position, the drive II subroutine is executed in # L15, and an interrupt wait state is set. If the release has not ended in # L13, the process proceeds to # L25 to correct the camera shake in the shooting distance state before the start of exposure. In # L25, the timer TC is reset and started, and in # L30, the timer interrupt is applied at half TI / 2 of the integration time TI.

FIG. 34 shows a timer interrupt that can be interrupted by # L30. In this timer interrupt, the counters CTk and CTl indicating the lens position are read respectively, and Nk1 and Nk are read.
After storing as l1, return (# L10
5, # L110). The counters CTk and CTl are pulse motors M3 and M for driving the camera shake correction lens.
When 4 rotates in the normal direction, it counts up, and when it rotates in the reverse direction, it counts down. The internal hard counter outputs a pulse output by the microcomputer μC3 in the lens to drive the lens drive amounts ΔNk and ΔNl. Counting. This timer interrupt is executed at half the integration time TI (TI / 2), so (Nk1, Nl1)
Indicates the lens position at the center of integration.

Then, in # L40, it is determined whether or not the correction is started. The signal for determining whether to start the correction is
In the lens communication B, it is input from the in-body microcomputer μC1. If correction is started in # L40, # L45, # L5
Variables Nk1 and Nl1 indicating the lens position of the integration center at 0 are set to 0 respectively, and if correction is not started, # L45, # L50
And skip to # L55. In # L55, the count values indicating the lens position at the calculation end time of camera shake detection are read from the counters CTk and CTl indicating the lens position and stored as Nk2 and Nl2, respectively, and the lens movement from the center of integration to the end of the shake detection calculation is completed. The amount is calculated by Nk = Nk2-Nk1 and Nl = Nl2-Nl1 (# L55 to # L70). Then, the lens drive amounts ΔNl and ΔNk necessary for camera shake correction are obtained from the input data Δl and Δk indicating the camera shake amount, respectively, and the lens movement amount N from the above-described integration center to the end time of the camera shake calculation.
Subtracting k and Nl, the actual lens drive amount ΔNk, Δ
Nl is calculated (# L75 to # L90).

FIG. 49 is a graph showing the amount of camera shake and the amount of drive of the camera shake correction lens. In the figure, B1 is the shake amount P
And L1 indicates the lens drive amount for correcting this. The shaded area sandwiched between the two lines B1 and L1 is the amount of camera shake after driving the camera shake correction lens. I1, I2, I3, I4, ... Indicate integration time, and C1, C2, C3, C4 ,. In the first shake detection, the shake amount (ΔNk, ΔNl) obtained as a result of the calculation in the calculation time C1 is the shake amount at the first integration center. Based on this, the camera shake correction lens is driven. The second integration is performed after the calculation time C1. The camera shake amount (ΔNk, ΔNl) obtained by the second calculation is the lens position (Nk1, N
It is the value in 11). Since the lens position at the end of the second calculation time C2 is (Nk2, N12), the calculation time C2 is calculated from the integration center of the second integration time I2.
Drive amount of the lens that has moved up to the end of (Nk2-Nk
1, Nl2-Nl1) is the amount of camera shake (ΔNk, ΔN
What is subtracted from l) is the actual lens drive amount.

The microcomputer μC3 next executes a camera shake determination subroutine (# L95). This will be described with reference to FIG. In this subroutine, the lens position to be driven next is Nk3 = Nk2 + ΔNk, Nl3 = Nl2 + Δ
It is calculated by Nl (# L150, # L155). The absolute values | Nk3 | and | Nl3 | are the physical correction limit values (the limit at which the correction lens hits the lens barrel) Gk,
It is determined whether or not it exceeds a value obtained by adding the allowable value ε to G _L (# L160, # L165). Absolute value | Nk3 |, | N
If either one of l3 | exceeds the predetermined value, # L193
Proceed to. On the other hand, in # L160 and # L170, the absolute value | Nk
3 |, | N13 | It is determined whether or not the calculation time is constant, assuming that they are almost the same, and whether or not the value exceeds a value obtained by multiplying the sum T (#
L170, # L175). The correction amount ΔNk or ΔNl is δ
If it exceeds × T, it is determined that the shake correction cannot be sufficiently performed, and the process proceeds to # L185. In # L185, it is determined whether or not the value obtained by multiplying the camera shake speed Q by the real time Ts of the shutter speed is less than the reference value K _TH . This is because even if the measured camera shake speed Q is high, the camera shake amount is small if the real time Ts of the shutter speed is short, so the camera shake warning is not issued at this time. #L
When the camera shake amount Q × Ts is less than the reference value K _TH at 185, or when the correction amount ΔNk, at # L170 and # L175.
If ΔNl is δ × T or less, the routine proceeds to # L187, where it is determined whether or not the flag RLF indicating that the release is in progress is set. # L187 flag RL
If F is set, return immediately. This is to prevent the warning signal once set during the release from being reset. On the other hand, when the flag RLF is not set, it means that the release is not in progress,
The warning signal indicating that the camera shake has occurred (or cannot be corrected) is reset (# L188). next,
In # L189, it is determined whether or not the release signal is sent from the camera. If no release signal is sent,
The flag RLF indicating this is reset, if sent, the flag RLF is set, the warning signal is reset, and each returns (# L189 to # L192). This is to newly detect whether or not camera shake has occurred during shooting. In # L185, if K _TH ≦ Q × Ts, camera shake has occurred (or correction cannot be completed).
As a result, a warning signal is set, it is determined whether or not the flag RLF indicating the release is set, and if it is set, the process returns, and if it is not set, #L
Proceed to 189 (# L193, # L194).

After the execution of the camera shake determination subroutine in # L95 in FIG. 33, the lens microcomputer μC3
At L100, the lens driving subroutine for camera shake correction is executed, and the state becomes the waiting state for the interrupt. This lens driving subroutine is shown in FIG. The lens driving motors M3 and M4 for camera shake correction are pulse motors as described above, and are driven one step by sending one pulse instructing normal rotation or reverse rotation from the lens microcomputer μC3. First, the in-lens microcomputer μC3
MOVF indicating that the lens is being driven in the direction
Set. Next, it is determined whether or not the absolute value | ΔNk | of the lens driving amount in the k direction is 0, and the absolute value | ΔNk | is 0.
If not, it is determined whether or not ΔNk is positive, and if it is positive, one drive pulse in the forward rotation direction is output, and if not positive, one drive pulse in the reverse rotation direction is output, and 1 is subtracted from | ΔNk | And newly set | ΔNk | (# L205 to # L22
5). If the absolute value | ΔNk | is 0 in # L205, k
If the lens drive in the direction is finished, the process proceeds to # L255, and the flag M indicating that the lens is being driven in the direction
Determine if the OVF has been reset. # L2
If the flag MOVF has been reset at 55, it is determined that the lens driving in the 1 direction described later has also been completed, and the process returns. If the flag MOVF has not been reset, #L
Proceed to 230. Further, the process also proceeds from # L225 to # L230.

In # L230 to # L250, it is determined whether or not the absolute value | ΔNl | of the lens driving amount in the l direction is 0,
If the absolute value | ΔNl | is not 0, it is determined whether or not ΔNl is positive. If it is positive, one drive pulse in the forward rotation direction,
If it is not positive, it outputs one driving pulse in the reverse direction,
1 is subtracted from | ΔNl | to obtain a new | ΔNl |.
If the absolute value | ΔNl | is 0 in # L230, it is determined that the lens drive in the l direction is completed, and the process proceeds to # L260 to
Flag MOVF indicating that the lens is being driven in the direction
Is reset and the process returns to # L205. Also, the process returns from # L250 to # L205.

Next, the lens drive II subroutine is shown in FIG.
7 shows. First, the microcomputer μC3 in the lens is # L30.
A flag M of 0 indicates that the lens is being driven in the 1 direction.
Set OVF. Next, it is determined whether or not the absolute value | CTk | of the lens position in the k direction is 0, and the absolute value | C
If Tk | is not 0, it is determined whether or not CTk is positive. If it is positive, one drive pulse in the reverse rotation direction is output, and if it is not positive, one drive pulse in the normal rotation direction is output, and | CTk |
1 is subtracted from this to obtain a new | CTk | (# L305
~ # L325). If the absolute value | CTk | is 0 in # L305, it is assumed that the lens position in the k direction has returned to the initial position, the process proceeds to # L330, and the flag MOVF indicating that the lens is being driven in the l direction is reset. Is determined. If the flag MOVF is reset in # L330, it is determined that the lens position in the 1 direction described later has also returned to the initial position, and the process returns. Flag MO
If the VF has not been reset, the process proceeds to # L335.
Also, the process proceeds from # L325 to # L335.

In # L335 to # L355, it is determined whether or not the absolute value | CTl | of the lens position in the 1 direction is 0. If the absolute value | CTl | is not 0, it is determined whether or not CTl is positive. If it is positive, one drive pulse in the reverse rotation direction is output, and if it is not positive, one drive pulse in the normal rotation direction is output, and 1 is subtracted from | CTl | to newly set | CT1 |. If the absolute value | CTl | is 0 in # L335, it is assumed that the lens position in the 1 direction has returned to the initial position.
The process proceeds to L360, the flag MOVF indicating that the lens is being driven in the l direction is reset, and the process returns to # L305.
Further, the process also returns from # L355 to # L305. As a result, the lens is driven in the opposite direction by the amount of the lens being driven to correct the camera shake, and the camera shake correction lens is reset to the initial position.

The above is the control relating to camera shake detection and camera shake correction. Returning to the flow of the in-body microcomputer μC1 in FIG. 6, the microcomputer μC1 outputs the data to the camera shake detection device BL by the data communication I of # 50, and then outputs the display data to the display control circuit DISPC by serial communication in # 55. The display data includes shutter speed TV, aperture value AV, shooting mode (normal mode, portrait shooting mode, landscape shooting mode), and presence / absence of camera shake. When camera shake occurs, the display control circuit DISPC performs display control so as to blink the display of the shutter speed TV.

The state of this display is shown in FIGS. In the figure, a, b, and c are shooting mode displays, which indicate the normal mode, portrait shooting mode, and landscape shooting mode, respectively, and only the selected mode is displayed.
Reference numerals d and e respectively indicate the shutter speed and the aperture value, and the blinking of the shutter speed display d warns that the camera shake has occurred. f and g indicate the aperture and shutter speed display in the viewfinder, and the blinking of the shutter speed display g warns that a camera shake has occurred.

When the display data output of # 55 is completed, the in-body microcomputer μC1 releases the release switch S2 in # 60.
ON / OFF of is determined. If the release switch S2 is off at # 60, the shooting preparation switch S at # 130.
It is determined whether 1 is ON. If the shooting preparation switch S1 is ON in # 130, the processing from # 15 is executed. If the release switch S2 is ON in # 60,
In # 62, it is determined whether or not the subject is in focus. If the focus is not obtained in # 62, the processes from # 15 are executed. # 62
If the subject is in focus, the shutter release is performed in # 65, the mirror-up is completed in # 70, and when the mirror-up is completed, the exposure control subroutine is executed in # 75.

FIG. 31 shows the exposure control subroutine. When this subroutine is called, first, the in-body microcomputer μC1 determines whether or not the flash photographing is performed. If the flash photographing (FLF = 1), the terminal FLOK is set to the “High” level, and the film sensitivity is set. S
V data is D / which is built in the microcomputer μC1 in the body.
It is output to the A converter (# 1300 to # 1302). As a result, the D / A converter converts the data of the film sensitivity SV into an analog signal and outputs it to the light control circuit STC. The light control circuit STC integrates the light reflected from the film surface substantially in synchronization with the flash emission, and outputs a light emission stop signal STP to the flash circuit FLC when a predetermined amount of light is integrated.

FIG. 44 shows the configuration of this flash circuit FLC.
Shown in In the figure, DD is a booster circuit composed of a DC / DC converter, which boosts the DC low voltage V _CC0 to a DC high voltage and stores the energy in the emission energy storage capacitor MC via the rectifying element DS. EMC is a light emission control circuit, which is a signal (FL) output during flash photography.
The flash signal is started by the AND signal of the "High" level of OK) and the X signal which is turned ON when the one-curtain running is completed, and the light emission is stopped in response to the light emission stop signal STP.

Returning to the flow of FIG. 31, from # 1302,
Alternatively, when # 1300 is not flash photography, #
Proceeding to 1303, a count value according to the shutter speed (exposure time) is preset in the exposure time counter, the magnet for running one curtain is separated, and one curtain running is started.
Start the exposure time counter (# 1303 to # 1
310). Then, it waits for the above counter to finish counting, and when it finishes counting, it waits for a certain period of time, sets the terminal FLOK to the “Low” level for the time required to complete the traveling from the start of the two-curtain traveling, and executes the lens communication B subroutine. Then, the in-lens circuit LE is notified that the exposure has been completed (# 1315 to # 1325). At this time, a correction end signal is sent to the lens side. Next, the subroutine of lens communication A is executed to input the data for the shake determination (# 1330). Next, the terminal S1INT of the microcomputer μC2 of the camera shake detection device BL is changed from “Low” level to “Hi”.
A signal that changes to the gh "level is output, the camera shake is detected, and the process returns (# 1335).

FIG. 4 shows a circuit configuration for controlling the exposure time.
3 shows. The exposure time counter CNTR presets a count value indicating the exposure time from the in-body microcomputer μC1 to the preset terminal PS, and when the start signal is input to the terminal ST, counts the clock φ input to the clock input terminal CK. When the count value of the exposure time counter CNTR reaches the preset value, a count-up signal is output from the terminal CU and the two-curtain traveling magnet 2Mg is separated to cause the two-curtain to travel. Here, the reason why the exposure time is controlled by hardware is that there is an interrupt from the camera shake detection device BL during exposure, and control (data communication with the lens) is performed by this interrupt.

When the exposure control subroutine is completed in # 75 of FIG. 6, the in-body microcomputer μC1 is set to 1 in # 80.
Controls frame winding. After the winding is completed, it is determined whether or not there is a camera shake during exposure by the data from the lens for the camera shake correction lens. If it is not the camera shake correction lens, it is determined by the data from the camera shake detection device BL (# 90). . If there is camera shake, the warning display data is set in # 95, and if there is no camera shake, the display data without warning is set in # 100, and the display data is displayed in the display control circuit DISPC in # 102. Is output and is displayed. Next, in # 105, it is determined whether or not the shooting preparation switch S1 is turned on. # 1
If the shooting preparation switch S1 is turned on in 05, # 9
Go to 0. Shooting preparation switch S in # 105 or # 130
If 1 is OFF, power supply transistors Tr1 and Tr
2 is turned off, and display erase data is displayed on the display control circuit DIS.
Microcomputer in the lens μC
The OFF signal of No. 3 is set, the lens communication B subroutine is executed and stopped (# 110 to # 125).

[0092]

According to the present invention, when a shake is detected and it is determined that the shake speed is fast or the shake is large and shake correction cannot be performed, a warning is issued, and the photographer responds accordingly. Since the shooting can be stopped and the way of holding can be corrected, it is possible to prevent the photograph from being a failed photograph.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a first portion of a camera according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a second portion of the camera of one embodiment of the present invention.

FIG. 3 is a circuit diagram showing a third portion of the camera of one embodiment of the present invention.

FIG. 4 is a circuit diagram of an in-lens circuit used in the camera of one embodiment of the present invention.

FIG. 5 is a first flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 6 is a second flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 7 is a third flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 8 is a fourth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 9 is a fifth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 10 is a sixth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 11 is a seventh flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 12 is an eighth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 13 is a ninth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 14 is a tenth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 15 is an eleventh flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 16 is a twelfth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 17 is a thirteenth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 18 is a 14th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 19 is a fifteenth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 20 is a 16th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 21 is a seventeenth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 22 is an 18th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 23 is a nineteenth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 24 is a twentieth flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 25 is a 21st flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 26 is a 22nd flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 27 is a 23rd flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 28 is a 24th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 29 is a 25th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 30 is a 26th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 31 is a 27th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 32 is a 28th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 33 is a 29th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 34 is a 30th flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 35 is a 31st flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 36 is a 32nd flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 37 is a 33rd flowchart for explaining the operation of the camera of one embodiment of the present invention.

FIG. 38 is a first example used in a camera according to an embodiment of the present invention.
2 is an AE program diagram of FIG.

FIG. 39 is a second view used in the camera according to the embodiment of the present invention.
2 is an AE program diagram of FIG.

FIG. 40 is a third view used in the camera according to the embodiment of the present invention.
2 is an AE program diagram of FIG.

FIG. 41 is a diagram showing the relationship between the photographing magnification and the aperture value in the person photographing mode used in the camera of one embodiment of the present invention.

FIG. 42 is a circuit diagram of a white balance circuit used in the camera of one embodiment of the present invention.

FIG. 43 is a circuit diagram of a shutter control circuit used in the camera of one embodiment of the present invention.

FIG. 44 is a circuit diagram of a flash circuit used in the camera of one embodiment of the present invention.

FIG. 45 is an explanatory diagram showing a shooting screen of the camera of one embodiment of the present invention.

FIG. 46 is a circuit diagram of a camera shake detection device used in the camera of one embodiment of the present invention.

FIG. 47 is an explanatory diagram showing a configuration of a CCD area sensor in a camera shake detection device used in a camera according to an embodiment of the present invention.

FIG. 48 is a first operation explanatory diagram of the camera shake detection device used in the camera of one embodiment of the present invention.

FIG. 49 is a second operation explanatory diagram of the camera shake detection device used in the camera of one embodiment of the present invention.

FIG. 50 is a diagram showing a first example used in a camera according to an embodiment of the present invention.
It is a figure which shows the display state of the display part.

FIG. 51 is a second view used in the camera according to the embodiment of the present invention.
It is a figure which shows the display state of the display part.

[Explanation of symbols]

 μC1 body microcomputer LE lens circuit

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Eiji Yamakawa 2-3-13 Azuchi-cho, Chuo-ku, Osaka City Osaka International Building Minolta Co., Ltd. (72) Inventor Hiroshi Mukai 2-3-3 Azuchi-cho, Chuo-ku, Osaka No. 13 Osaka International Building Minolta Co., Ltd. (72) Inventor Hisayuki Masumoto 2-3-3 Azuchi-cho, Chuo-ku, Osaka City No. 13 Osaka International Building Minolta Co. (72) Inventor Naoshi Okada 2-chome, Azuchi-cho, Chuo-ku, Osaka 3-13 Osaka International Building Minolta Co., Ltd. (72) Inventor Takehiro Kato 2-33 Azuchi-cho, Chuo-ku, Osaka City Osaka International Building Minolta Co. (72) Inventor Hiroshi Otsuka Azuchi-cho, Chuo-ku, Osaka 2-chome 3-13 Osaka International Building Minolta Co., Ltd.

Claims (3)

[Claims] 1. A camera shake detection unit for detecting camera shake, a camera shake correction unit for correcting image shake according to the detected camera shake, a judgment unit for judging whether or not camera shake correction is possible, and a camera shake correction not possible. And a warning means for displaying that the camera. 2. The camera according to claim 1, wherein the discriminating means is a means for discriminating whether correction is possible or not based on a blurring speed. 3. The camera according to claim 1, wherein the discriminating means is a means for discriminating whether or not the correction is possible depending on the magnitude of the blur.