JP3144469B2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

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

[0003]

However, when the camera shake is very large (the camera shake speed is high and the camera shake amount is large), the correction capability of the camera cannot keep up with the camera, and a blurred photograph is produced. When photographing, the photographer is anxious if he or she does not 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 correcting means for correcting the image shake, a camera shake detecting means for detecting the speed of the camera shake, and Based on the speed of the detected blur, the given shooting condition
Determining means for determining whether blur correction can be performed by the operation of the blur correcting means without changing the matter , or whether blur correction is not possible even if the blur correcting means operates; and And warning means for displaying that blur correction is impossible when it is determined that blur correction is impossible.

[0005]

According to the present invention, in a camera having a blur correction function, a warning is issued when blur correction is impossible, thereby preventing a failed photograph.

[0006]

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

An _AFCT is a light-receiving circuit for focus detection, which processes a CCD line sensor for detecting a focus of an object within a range to be described later, a driving circuit of the CCD line sensor, and an output of the CCD line sensor. A /
And a circuit for performing D conversion and transmitting the converted data to the microcomputer μC1 in the body.
1 is connected. The focus detection light receiving circuit AF _CT, information on the defocus amount of an object located in the distance measurement range.

Reference numeral LM denotes a photometric circuit, which performs A / D conversion of a photometric value within a photometric range described later and transmits the result to the microcomputer μC1 in the body as luminance information. DX is a film sensitivity reading circuit that reads the film sensitivity data provided in the film container and serially outputs the data to the microcomputer μC1 in the body. The DISPC inputs display data and a display control signal from the microcomputer μC1 in the body, and performs predetermined display on the display unit DISP _I (see FIG. 50) on the upper surface of the camera body and the display unit DISP _II (see FIG. 51) in the finder. Display control circuit.

BL denotes a camera shake detection device built in the camera body, and includes a microcomputer μC2 and a CCD for camera shake detection.
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 turns on when one shutter curtain travel is completed and turns 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 unique to the interchangeable lens to the microcomputer μC1 in the body 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 focus adjusting 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 the focus detection information, and the normal rotation, reverse rotation, and stop are controlled by a command from the microcomputer μC1 in the body. 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 microcomputer μC1 in the body at every predetermined rotation angle. The microcomputer μC1 in the body counts these pulses, detects the amount of extension from the infinity position to the current lens position, and detects the shooting distance of the subject from the amount of extension (number of extension pulses).

TV _CT is a shutter control circuit for controlling a shutter based on a control signal from the microcomputer μC1 in the body. The detailed configuration of the shutter control circuit _TVCT will be described later. AV _CT is microcomputer μC in the body
An aperture control circuit that controls the aperture 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 microcomputer μC1 in the body. WB
Is a white balance circuit which detects three primary color components of light, and R (red light) and G (green light) with respect to B (blue light)
, And converts them into digital signals, which are transmitted to the microcomputer μC1 in the body. The detailed configuration of the white balance circuit WB will be described later.

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

V _DD is an operating power supply voltage of the microcomputer μC1 in the body, the circuit LE in the lens, the camera shake detection device BL, the film sensitivity reading circuit DX, and the display control circuit DISPC.
V _{CC 1} focus detection circuit AF _CT, an operation power supply voltage of the light measuring circuit LM, is supplied through the feed transistor Tr1 from the power source battery E under the control of the power supply control signal PW1. V
_CC2 is an operation 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} an operation 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 current from the power supply battery E may increase, and the battery voltage may temporarily decrease. Therefore, the backup capacitor CB is charged from the power supply battery E via the diode DB for backflow prevention, and the power supply voltage V _DD is supplied from the capacitor CB to the microcomputer μC1 or the like.

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

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

[0018] S _E is a battery mounting detecting switch turned OFF when the battery E is attached to the camera. When the battery E is mounted and the battery mounting detection switch _SE is turned off, the capacitor C1 is charged via the resistor R1, and the reset terminal RE1 of the microcomputer μC1 in the body is set to “Low”.
The level changes from the level to the “High” level. Thereby, the microcomputer μC1 in the body is interrupted, the built-in oscillator automatically operates, and the microcomputer μC1 in the body executes the reset routine shown in FIG.

Next, a configuration for serial data communication will be described. Photometry circuit LM, film sensitivity reading circuit DX, display control circuit DSIPC, and camera shake detection device BL
Performs serial data communication with the microcomputer μC1 in the body via signal lines of a serial input SIN, a serial output SOUT, and a serial clock SCK. And
The communication target with the microcomputer μC1 in the body is selected by the chip select terminals CSLM, CSDX, CSDISP, and 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 the "Low" level, the film sensitivity reading circuit DX is selected, and when the terminal CSDISP is at the "Low" level, the display control circuit DISPC is selected.
When the terminal CSBL is at the “Low” level, the camera shake detection device BL is selected. Further, the three serial communication signal lines SIN, SOUT, and SCK are connected to the in-lens circuit LE. When selecting the in-lens circuit LE as a communication target, the terminal CSLE is set to the “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. The figure shows a camera shake correction lens NBL having a camera shake correction function.
The circuit configuration of FIG. In the drawing, μC3 is a microcomputer in the lens that performs control for data communication with the camera body and correction of camera shake.

Reference numerals M3 and M4 denote pulse motors for driving the camera shake correction lens, which drive the camera shake correction lens in the later-described k-direction and l-direction, respectively. MD3, M
D4 is a motor drive circuit, which is a microcomputer μC3 in the lens.
Pulse motors M3, M
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 an infinity position at each focal length. These are used to calculate the photographing magnification. The focal length data is also used for calculating 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 other circuits, and GND2 is a motor drive circuit M
An earth line connected to D3, MD4 and the two pulse motors M3, M4, and GND1 is an earth line connected to circuits other than the above. The terminal CSLE is
This is an input terminal of an interrupt signal, and the microcomputer μC3 in the lens executes the interrupt LCSINT by inputting 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 microcomputer μC3 in the lens when the voltage V _DD supplied from the camera body becomes lower than the normal operating voltage of the microcomputer μC3 in the lens. R3 and C3 are reset resistors and capacitors for resetting the microcomputer μC3 in the lens. RE3 is microcomputer μ in the lens
This is a reset terminal of C3.
When the voltage V _DD for driving E is supplied and the terminal RE3 changes from “Low” level to “High” level by the resistor R3 and the capacitor C3, the microcomputer μC3 in the lens performs a reset operation.

_SLE is a lens attachment detection switch, which is turned off when the interchangeable lens is attached to the camera body BD and the mount is locked. That is, when the interchangeable lens is removed from the camera body, the switch _SLE is turned ON, and both ends of the capacitor C3 are short-circuited. As a result, the charge stored in the capacitor C3 is discharged,
The reset terminal RE3 of the microcomputer μC3 in the lens is “Lo”
After that, when the interchangeable lens is attached to the camera body, the switch S _LE is turned off, the capacitor C3 is charged via the resistor R3 by the power supply voltage V _DD , and the time constant of the resistor R3 and the capacitor C3 is set. After a lapse of a predetermined time determined by the above, the terminal RE3 changes to the "High" level, and as described above, the microcomputer μC3 in the lens performs a reset operation.

S _BL is a camera shake correction inhibition switch. When this switch S _BL is turned on, camera shake correction is not performed.
The camera also performs a normal AE program operation. As described above, the camera body BD and the circuit LE in the lens according to the present embodiment are described.
After the description of the hardware described above, the software will be described next. 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 described as needed in the following description of software as needed.

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

Next, when the first stroke of the release button is depressed, the photographing preparation switch S1 is turned on, and "H" is input to the interrupt terminal INT1 of the microcomputer μC1 in the body.
A signal that changes from the “high” level to the “Low” level is input, whereby the microcomputer μC1 in the body receives the signal shown in FIG.
(1) is executed. First, the microcomputer μC1 in the body sets the power supply control terminal PW1 to the “High” level, turns on the power supply transistor Tr1, and supplies power to each circuit (# 10). Thereafter, a signal that changes 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, a lens communication A subroutine is executed to read 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 subroutine of lens communication A. When this subroutine is called, first, the terminal CSLE is set to the “Low” level to notify the microcomputer μC3 in the lens that data communication is to be performed (#
150). Then, 2-byte data is exchanged 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 a hexadecimal number) is transmitted from the lens to the body. Body status IC
PB includes 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. Lens status ICPL the type of the lens (whether camera shake correction lens) and image stabilization ON / OFF of the protect switch S _BL
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 NBL, the data is 6 bytes. Input data (# 1)
60 to # 170). Then, 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 open aperture value AVo, the fifth byte is the maximum aperture value AVmax, the sixth byte is the defocus amount DF, and the rotation speed of the AF motor M1. conversion coefficient K _L, 7 byte to be converted to is a distance data. If the lens is not a camera shake correction lens, a total of 7 bytes of data up to this point are input. If the lens is a camera shake correction lens, data of a camera shake correction possible amount is also input from the lens. This will be described later.

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

FIG. 10 shows this AF subroutine.
When this subroutine is called, first, it is determined whether or not a flag AFEF indicating in-focus is set (#
200). When the flag AFEF is set, it is determined that the camera is already in focus, and the process returns without performing the AF operation. When the flag AFEF is not set, performs the integration of the CCD line sensor in the focus detecting light receiving circuit AF _CT (charge storage), after integration end, A /
The D-converted data is dumped, a correlation operation is performed based on the input data, and a defocus amount DF is calculated (#
205 to # 220). Based on the defocus amount DF, it is determined whether or not the subject is in focus.
Set FEF and return (# 225, # 23)
0). On the other hand, if the camera is not in focus, the flag AFEF is reset, the lens driving subroutine is executed, and the routine returns (# 235 to # 240).

FIG. 11 shows this lens driving subroutine. When the subroutine is called, the body microcomputer μC1 is obtained on the defocus amount DF is multiplied by the lens driving amount conversion coefficients K _L calculates the rotational speed N of the AF motor M1, the rotation speed N is positive whether And if it is positive, AF
A control signal is output to the lens drive circuit MD1 to rotate the motor M1 in the normal 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. # 260).

Next, the flow of a counter interrupt for driving the lens by the number of revolutions 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 μC in the body
1 is obtained by subtracting 1 from the absolute value | N |
And it is determined whether or not | N | has become 0 (#
280, # 285). When | N | = 0, a 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, return immediately.

An AF subroutine is executed at # 35 in FIG.
After that, the microcomputer μC1 in the body detects color temperature.
The routine is executed (# 40). Detect this color temperature
FIG. 42 shows the configuration of a white balance circuit WB for
You. Three light receiving elements PD_R, PD_G, PD_BOn the light-receiving surface of
Is R (red light), G (green light), B (blue light)
Color filter F_R, F_G, F_BPlace
And a signal indicating the light intensity for the three primary colors R, G, and B
S_R, S_G, S_BAnd each signal is calculated by a logarithmic compression circuit.
Logarithmic compression. In the figure, the feedback impedance is
The operational amplifier to which the diode is connected is a logarithmic compression circuit.
You. Then, the signal S is output by the differential amplifier at the subsequent stage._R, S
_BDifference, S_G, S_BBy taking the difference between
Ratio signal S_R/ S _B, S_G/ S_BTo obtain the given
A / D conversion on a cycle and transmits to microcomputer μC1 in body
You. Each signal S_R, S_G, S_BIs treated as logarithmic
The difference signal is obtained by taking the difference with the differential amplifier.
be able to.

FIG. 13 shows a subroutine of color temperature detection (AWB: auto white balance). When the subroutine is called, the microcomputer μC1 in the body
A signal subjected to A / D conversion 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) increases, and the ratio signal S _G
/ S _B significantly increases. By detecting this, it is determined whether or not the light source is a fluorescent lamp. If the light source is a fluorescent lamp, the flag FLLF is set. If the light source is not a fluorescent lamp, the flag FLLF is reset, and the process returns (# 310 to # 320).

After the execution of the color temperature detection subroutine at # 40 in FIG. 6, the microcomputer μC1 in the body executes the AE calculation (automatic exposure calculation) subroutine (# 4).
5). FIG. 14 shows a subroutine of this AE calculation. When this subroutine is called, first, the microcomputer μC1 in the body reads the film sensitivity SV into the film sensitivity reading circuit D.
X is read 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 calculated as BV =
Exposure value EV is obtained as BVo + AVo, and EV = BV10 SV
(# 360, # 365). Next, the microcomputer μC1 in the body obtains the camera shake limit shutter speed when the camera shake correction lens is not mounted 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 mounted is determined at 32 / f [sec], and this is converted into an apex value TVf2 (# 368). Here, it is considered that when the camera shake correction lens is mounted, the camera shake limit shutter speed can be reduced to 32 times the exposure time and the apex value of -5 EV in a normal state.

The exposure mode is determined according to the state of the mode selection switches S _M1 and S _M2 , and the mode I (normal mode), mode II (person shooting 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 describing the subroutines of the modes I, II and III, the AE program diagrams of each mode are shown in FIGS.
0 and described.

FIG. 38 is an AE program diagram of mode I (normal mode). In this mode, with respect to the exposure value EV, the open aperture value AVo and the TVf1 or TV from the low luminance to the camera shake limit shutter speed TVf1 or TVf2.
This is a combination of shutter speeds TV of 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. When the aperture value AV reaches the maximum aperture value AVmax, the distribution is terminated and only the shutter speed TV is changed. For flash photography, the shutter speed is T
This is performed when the luminance is less than Vf1 or TVf2 or the luminance BV is less than 5.

FIG. 39 shows A in mode II (person 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. When the shutter speed TV is less than TVf1 or TVf2 or when the brightness BV is less than 5, flash photography is performed. In the camera shake correction lens, the lower limit of the shutter speed in flash photography is set to TV = 2 (1/4 second in real time) or TV
f2 is larger. Although it is natural that the camera shake limit shutter speed TVf2 is set to the lower limit from the viewpoint of preventing camera shake, TV = 2 is set to the lower limit. This is because it often becomes a copy, and it is not good that a shadow is formed.
This is particularly problematic in flash photography, since after the flash fires, the subject may determine that photography has been completed and move.

FIG. 41 shows a graph for determining the aperture value AVβ from the photographing magnification β. In FIG. 41, the horizontal axis indicates the photographing magnification β, and the vertical axis indicates the aperture value AVβ. The scale on the vertical axis indicates the aperture value by an apex value, and the F number is also written in parentheses. β ≧ 1/10
, AV = 6 (F8), and 1/10> β ≧ １ ／
When 0, a value on a straight line connecting AV = 6 (F8) and AV = 4 (F5.6) is set, and when 1/40> β ≧ 1/80, AV = 4 (or open aperture value), 1/80> β ≧
When 1/160, AV = 4 (F4) and AV = 8 (F1
6) is a value on a straight line connecting, and when 1/160> β, A
V = 8 (F16). When β> 1/20, the aperture is slightly reduced for macro photography to increase the depth of field.
When ≧ β ≧ 1/100, the depth of field is reduced as a portrait (portrait shooting), and when β <1/100, landscape shooting is gradually stopped down until β = 1/160 and AV = 8. Gaining depth. In the present embodiment, there is provided a data table for reading the photographing magnification β in this graph as an address and reading out the aperture value AVβ as data.

FIG. 40 is an AE program diagram of mode III (landscape photographing mode). In this mode, a predetermined aperture value F11 (AV = 7) is set from the camera shake limit shutter speed TVf1 or TVf2 to the maximum shutter speed TVmax in order to obtain a depth of field. And the exposure value E
The shutter speed obtained from V is the maximum shutter speed TV
When it is faster than max, the aperture is changed from a predetermined aperture value (AV = 7) to the maximum aperture value AVmax while keeping TVmax. If the camera shake limit shutter speed TVf1 or TVf2 or less due to the relationship of the exposure value EV, the shutter speed TV is set to TVf1 or TVf2, and the aperture value A
V is increased from a predetermined aperture value F11 (AV = 7) to an open aperture value AV.
Open to o. After the aperture is opened to the open aperture value AVo, the shutter speed TV is further reduced. At this time, no flash photography is performed.

Next, the subroutines of the 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 μC in the body
1 determines whether or not the interchangeable lens is a camera shake correction lens, and if it is a camera shake correction lens, executes a subroutine of AV and TV calculation for determining an aperture value AV and a shutter speed TV (# 400, # 405). ).

FIG. 17 shows a subroutine for the AV and TV calculations. When this subroutine is called,
The aperture value AV is obtained by AV = EV / 2−TVf20 AVo (# 655). This aperture value AV is the maximum aperture value AVma
When the value exceeds x, the maximum aperture value AVm is set as the aperture value AV.
ax, and when the aperture value is less than the minimum (open) aperture value AVo, the minimum aperture value AVo is set as the aperture value AV (# 6)
20 to # 635). Then, from the obtained aperture value AV and exposure value EV, the shutter speed TV is obtained by TV = EV-AV (# 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 as 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 set to the maximum aperture value AVmax.
If it is equal to or smaller than max, the process returns as it is (# 66)
0, # 665).

When the subroutines for the AV and TV calculations are completed at # 405 in FIG.
Determines whether the light source is a fluorescent lamp (FLLF = 1) (# 415). If the light source is a fluorescent lamp, the subroutine of flash photography FL1 is executed and the routine returns (# 420). When the light source is a fluorescent lamp, the light becomes greenish as a whole due to the 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 a little and keep the feeling. (Usually 1: 1).

FIG. 19 shows a subroutine of this flash photography FL1. When this 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 or not the determined shutter speed TV exceeds the maximum flash synchronization speed TVx (# 675). Here, the flash tuning fastest TVx is expressed by the apex value TV
Let x = 8 (1/250 second in real time). If 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 lower than the flash synchronization maximum speed TVx, nothing is performed, and the process proceeds to # 685. . In # 685, it is determined whether or not the shutter speed TV is lower than the camera shake limit shutter speed TVf2. # 685
The shutter speed TV is the camera shake limit shutter speed TV
If it is less than f2, the control shutter speed T is determined at # 690.
The camera shake limit shutter speed TVf2 is set as Vc. If the camera shake limit shutter speed TVf2 is higher than Vc, 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 set to AV = EV-TVc.
Ask for. If the obtained aperture value AV is smaller than the minimum aperture value AVo, the control aperture value AVc is set as the minimum aperture value AVo.
When the obtained 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 if none of the above, the obtained aperture value AV is set as the control aperture value AVc (#
710 to # 730). SV = SV +
The flag FLF is set to 0.5 to indicate that it is flash photography, and the routine returns (# 735, # 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),
The flow shifts to # 455, where it is determined whether or not the calculated shutter speed TV is lower than the camera shake limit shutter speed TVf2. When the shutter speed TV is lower than the camera shake limit shutter speed TVf2 in # 455, the process proceeds to # 480,
Execute the subroutine of flash photography FL2 (# 4
80).

The subroutine of this flash photography FL2 is shown in FIG. 20 and FIG. 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 controlled to be 1 EV under. First, in # 750, 1 is added to the exposure value EV obtained by the calculation, and the control exposure value EV is set to 1 EV.
Under. In # 751, it is determined whether or not the interchangeable lens is the camera shake correction lens NBL. If the interchangeable lens is a camera shake correction lens, the above-described AV / TV calculation subroutine is executed. If the interchangeable lens is not a camera shake correction lens, the below-described AV / TV calculation subroutine is executed, and the aperture value AV and shutter speed are set. The TV is calculated, and the process proceeds to # 755 (# 752, # 753). In # 755, it is determined whether or not the calculated shutter speed TV exceeds the maximum flash tuning speed TVx. # 755
If the shutter speed TV exceeds the flash synchronization maximum speed TVx at # 760, the control shutter speed TVc at # 760
The flash synchronization maximum speed TVx is set as # 77
Go to 0. If the shutter speed TV is equal to or less than the maximum flash synchronization speed TVx in # 755, the process proceeds to # 762,
It is determined whether or not the interchangeable lens is the camera shake correction lens NBL. If the interchangeable lens is a camera shake correction lens,
It is determined whether or not the calculated shutter speed TV is lower than the camera shake limit shutter speed TVf2 (# 7).
64). If the shutter speed TV is lower than the camera shake limit shutter speed TVf2 in # 764, the camera shake limit shutter speed Tc is set as the control shutter speed TVc in # 766.
Vf2 is set, and the routine proceeds to # 770. If the shutter speed TV is equal to or higher than the camera shake limit shutter speed TVf2 in # 764, the shutter speed TV calculated by calculation is set as the control shutter speed TVc in # 768.
Go to 0. If it is determined in step # 762 that the interchangeable lens is not a camera shake correction lens, it is determined in step # 767 whether 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 becomes the camera shake limit shutter speed TVf1.
If it is the above, the shutter speed TV calculated by calculation is set as the control shutter speed TVc in # 768, and # 8 is set.
Go to 00. In # 770, the aperture value AV is calculated by subtracting the control shutter speed TVc from the exposure value EV. When the aperture value AV is smaller than the open aperture value AVo, the open aperture value AVo is changed to the maximum aperture value AV.
If it exceeds max, the maximum aperture value AVmax is set. If 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). At # 800, the film sensitivity SV is set to SV = SV + 1, the flash light amount is set to be 1 EV under the appropriate value, and at # 805, the flag FLF indicating the flash photography is set, and the routine returns.

Returning to the flow of FIG. 15, when the shutter speed TV is equal to or higher than the camera shake limit shutter speed TVf2 in # 455, it is determined in # 460 whether or not the luminance BV is less than 5. If the luminance BV is less than 5 in # 460, the above-described subroutine of the flash photography FL2 is executed in # 480, control for giving contrast by flash light is performed, and the flow 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 routine returns (# 465). , # 470).

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

FIG. 16 shows a subroutine of mode II (person photographing mode). When this subroutine is called, first, the photographing magnification β (the size of the main subject occupying the photographing screen) is obtained from the distance data and the focal distance 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 this is calculated as the calculated aperture value A.
V (# 505, # 510). Next, it is determined whether or not the calculated aperture value AV is smaller than the open aperture value AVo (# 515). If the calculated aperture value AV is smaller than the open aperture value AVo, the open aperture value AVo is set as the calculated aperture value AV in # 520.
20 is skipped, and the process proceeds to step # 525. In the person photographing mode, in order to perform flash photographing, it is determined in step # 525 whether or not the camera shake limit shutter speed TVf1 exceeds the flash synchronization maximum speed TVx.
In step # 530, the flash synchronization maximum speed TVx is set as the camera shake limit shutter speed TVf1, and if not exceeded, step # 530 is skipped and the process proceeds to step # 535. In # 535, to make the background 1 EV under,
The exposure value EV is set to EV = EV + 1. And # 540
Then, the shutter speed TV is obtained by TV = EV-AV. In step # 545, it is determined whether or not the obtained shutter speed TV exceeds the maximum flash synchronizing speed TVx. Execute the FL3 subroutine and return. The flash photography FL3 subroutine is shown in FIG.
This is the flow after # 770 of # 1. Here, it is assumed that the exposure value is not appropriate with the above-mentioned aperture value AV = AVβ.
The aperture value AV is determined again. In step # 545, if the calculated shutter speed TV is equal to or lower than the maximum flash synchronization speed TVx, the process proceeds to step # 560, and it is determined whether or not the interchangeable lens is the camera shake correction lens NBL. If the interchangeable lens is a camera shake correction lens in # 560, it is determined in # 565 whether or not the calculated shutter speed TV is lower than the camera shake limit shutter speed TVf2. Calculation shutter speed TV at # 565
Is less than the camera shake limit shutter speed TVf2, #
In 570, the camera shake limit shutter speed TVf2 is set as the control shutter speed TVc, and in # 555, the flash photography FL3 subroutine is executed. In step # 565, the calculated shutter speed TV becomes the camera shake limit shutter speed TVf.
If it is not less than 2, the calculated shutter speed TVc 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 set to indicate that flash photography is being performed.
Set F and return (# 600). # 560
If the interchangeable lens is not a camera shake correction lens in #
At 575, it is determined whether the calculated shutter speed TV is lower than the camera shake limit shutter speed TVf1. # 575
If the calculated shutter speed TV is lower 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 flash photography FL3 subroutine is executed in # 555. On the other hand, if the calculated shutter speed TV is equal to or higher than the camera shake limit shutter speed TVf1 in # 575, # 5
The process from 85 to # 600 is executed, and the process returns.

Next, a subroutine of mode III (landscape 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 set to TV = E in # 604
The calculation is performed using V-AV. Then, in # 605, it is determined whether or not the interchangeable lens is the camera shake correction lens NBL. #
If the interchangeable lens is a camera shake correction lens in 605, #
At 606, it is determined whether or not TV ≧ TVf2, and TV ≧ TVf
If not 2, the aperture value AV is set to AV = EV−T in # 610.
The calculation is performed using Vf2 + AVo. If the interchangeable lens is not a camera shake correction lens in # 605, TV ≧ TVf in # 608
1 or not, and if TV ≧ TVf1, # 61
At 5, the aperture value AV is calculated as AV = EV-TVf1 + AVo, and the process proceeds to step # 620. The processing after # 620 (control for natural light photographing) is as described above, and a description thereof will be omitted. In addition, TV ≧ TVf in # 606
2, or when TV ≧ TVf1 in # 608, #
Proceed to 645.

Returning to the flow of FIG. 6, when the subroutine of the AE calculation is completed in # 45,
C1 outputs # to the camera shake detection device BL to output data.
At 50, the subroutine of data communication I is executed. FIG. 22 shows a subroutine of this data communication I. When this subroutine is called, first, the microcomputer μC1 in the body
Inhibits the interrupt DEINT from the 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). The 4-byte data includes the focal length f, the control shutter speed TVc, the type of lens, and whether or not focusing is performed. After outputting these data, the terminal CSBL is set to “High”.
Level, and an interrupt DEINT from the shake detection device BL
Is returned (# 915, # 920).

In the microcomputer μC2 of the camera shake detection device BL, the terminal CSBL of the microcomputer μC1 in the body is set to “High”.
In response to a signal that changes from the "h" level to the "Low" level, the interrupt CSBL is executed, as shown in FIG. Is set, and the process returns (# 110).
5, # 1110).

Here, a detailed configuration of the camera shake detection device BL will be described. FIG. 45 shows the range of camera shake detection (image shake detection) occupying the shooting screen S. In the figure, Sa is a distance measuring range of the light receiving circuit AF _CT focus detection, Sb
Is camera shake detection by the camera shake detection device BL (image shake detection)
And Sc is a photometry range by the photometry circuit LM.

FIG. 46 is a block circuit diagram of the camera shake detection device BL. μC2 is a microcomputer that performs calculation for camera shake detection and sequence control thereof (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, which has 24 pixels in the vertical direction and 36 pixels in the horizontal direction at the same ratio as the 35 mm film size. Each surface element has a light receiving unit, a storage unit, and a transfer unit, and the charge stored in the storage unit changes according to the photocurrent obtained by the light receiving unit. 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 unit DT of the microcomputer μC2 is provided with an A / D conversion unit, 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 monitor light receiving element, SWa, S
Wb is a switch element, Ca is a capacitor, and CMP is a comparator.
Is provided to control the integration time. Terminal IN
ST is a terminal that outputs an integration start signal, outputs an integration start signal that is at a “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 _VDD . When the switch element SWb is turned on 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 _VDD . Terminal INE
N is a terminal for inputting an integration end signal, and the monitoring 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 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. A terminal INEND is a terminal for outputting an integration end signal, and outputs a signal for stopping the integration operation of the CCD area sensor X when the output of the comparator CMP becomes the “High” level or when a predetermined time has elapsed. You.

FIG. 25 shows a flowchart of the microcomputer μC2 for controlling the camera shake detection device BL. “Low” from “High” level by microcomputer μC1 in the body
To level or from “Low” level to “High”
When the signal changing to the level is input to the interrupt input terminal S1INT of the microcomputer μC2, the microcomputer μC2
The interrupt of S1INT shown in FIG. First, # 1001
Determines whether the interrupt input terminal S1INT is at a "Low" level by detecting the level of the input terminal P1 of the microcomputer .mu.C2. Interrupt input terminal S1I at # 1001
If it is determined that NT is at the “High” level, the free-run timer TA is stopped at # 1002,
Assuming that photographing by the camera has been completed, the microcomputer μC2 is stopped. If it is determined in step # 1001 that the interrupt input terminal S1INT is at the "Low" level, the processing proceeds to step # 10.
03 starts a free-run timer TA. The free-run timer TA operates without stopping until the shooting by the camera is completed. Then, assuming that the photographing of the camera has started, the flag DTF indicating the data communication I is reset at # 1004, and the subroutine for integration control of the CCD area sensor X is executed at # 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 last integration end time to the current integration start time is A21.
= A1-A2 (# 1150, # 1151). Then, the terminal INST for outputting the integration start signal is set to the “High” level for a certain period of time, whereby
a and SWb are turned on for a certain period of time to reset the capacitor Ca discharged by the photocurrent of the monitoring light receiving element MPD to the power supply voltage V _DD and to store the storage of each pixel of the two-dimensional CCD area sensor X at the power supply voltage. by resetting to V _DD, a "Low" level to pin INST after a predetermined time, the switch element SWa, the SWb O
The integration is started as FF (# 1152). Then, the timer TB is reset and started in # 1155. In # 1160, a terminal INE for detecting the end of integration
Wait until N goes to the “High” level, and the terminal INEN
Becomes "High" level, to terminate the integration, #
Move to 1170. In step # 1160, the terminal INEN is set to “H”.
If the level does not reach the "high" level, the timer TB has the timing of the predetermined time T1 in # 1165. If the predetermined time T1 has elapsed, the process proceeds to # 1170 to terminate the integration, and the predetermined time T1 has elapsed. If not, the process returns to step # 1160.
At the time of h "level, the electric charge of the accumulation section of each pixel in the CCD area sensor X is transferred to the transfer section. 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 obtained by A12 = A2-A1, and the arithmetic mean TM12 of the current and previous integration times is calculated as TM12 = ( A12 ten LA1
2) / 2 and return (# 1176, # 11
78). The meaning of this operation will be described later.

At the time when the integration of the CCD area sensor X is completed in # 1005 in FIG. 25, charges are accumulated in the accumulation section of each pixel of the CCD area sensor X according to the luminance of each pixel. Next, the microcomputer μC2 sets # 1007
Executes a data dump subroutine, dumps the charge information (integrated data) accumulated for each pixel of the CCD area sensor X, converts it into digital data with an internal A / D converter, and stores it in memory.

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

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

The reason why the camera shake detection (image shake detection) is not performed when the image is out of focus is that when two images that are out of time are out of focus and compared with each other, i) 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 decreases. (Ii) When the photographing lens is driven to adjust the focus, the image changes, and an image shake may be detected even though no image shake actually occurs due to a camera shake. This is because such a problem arises.

On the other hand, when focusing is performed in # 1015, 1 is added to the variable N, and it is determined whether or not this variable N is 2 or more. The prohibition flag CIF is set, and the process proceeds to # 1005 (#
1030 to # 1040). This is because when performing camera shake detection (image shake detection), at least image data serving as a reference portion and image data serving as a reference portion are required, and for that purpose, the variable N must be 2 or more. # 10
If the variable N is 2 or more at 35, the correction prohibition flag CIF is reset at # 1050 to permit the camera shake correction, and a subroutine of the camera shake amount calculation is executed at # 1055.

The subroutine for calculating the camera shake amount is shown in FIG.
Shown in When this subroutine is called, first, the correlation function

[0063]

(Equation 1)

.., 30 and l = 0, 1,
, And 20 (# 1200). This means that the image data a (i, j) of the reference part is compared with the image data a '(i + k, j + 1) of the partial area in the reference part having the same size. The correlation function d (k,
30), and 1 = 0, 1,..., 20 to shift the image data of the reference portion by one pixel in the horizontal and vertical directions with respect to the reference portion. While comparing. Next, the correlation function d
The minimum value of (k, l) is obtained, and the shift amount (k, l) that gives the minimum value is obtained (# 1205). The shift amount (k, l) when the image data a (i, j) of the reference portion matches the image data of the partial area of the same size at the center of the reference portion as shown in FIG. (15, 10). Therefore, when the image data a (i, j) of the reference portion matches the image data of the partial area of the same size at an arbitrary position of the reference portion, the shift direction (vector) is (Δ
k, Δl) = (k, l) − (15, 10), and the deviation is calculated as P = (Δk ² + Δl ² ) ^1/2 (# 1210, # 1215). After the above operation, the operation end time is read from the free-run timer TA, the read time is stored as A3, and the integration end time A2
A23 from A to A3 = A3
3-A2 is calculated, and a 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 or not 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, the calculation is performed as T = TM12 + LA23 + A31 (# 1235- # 1245).

The 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 proves to be between ₁ ~t _2. The time point t _{1 at} which the image by the previous integration is formed is defined as the center of the previous integration, and the time from there to the end of the previous integration is
(LA2-LA1) / 2 = LA12 / 2. That is, it is half of the previous integration time. The time of the previous data dump is A21 = A1-LA2 (A in the flowchart is A1).
2). Time point t ₂ at which an image by this integration is formed
It was used as a time of integration center, the time from the time of integration start to the current integration center t _2, half of the current integration 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 calculation and the time required for data transfer (time for outputting data from the microcomputer μC2 of the camera shake detection device BL to the microcomputer μC1 in the body) are always included. time T until the current integration center from the integrating center, be between t ₂ ~t ₃ in FIG. 16, T = (LA2-LA1 ) / 2 + (LA3-LA2)
+ (A1-LA3) + (A2-A1) / 2 = TM12 +
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, and calculates the camera shake amount per unit time, that is, the camera shake speed Q = P / T is obtained (# 1255). Then, the last calculation end time A3 is stored as LA3, and the time A23 from the last integration end time A2 to the calculation end time A3 is stored as LA23, and the process returns (# 1260, # 1265).

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

Next, the subroutine of the camera shake judgment is shown in FIG.
Shown in When this subroutine is called, first, the camera shake speed Q is multiplied by the exposure time Ts (real time), and this value Q
It is determined whether or not × Ts 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 longer the exposure time Ts, the larger the camera shake amount. If the value is less than the predetermined value K1, the flag WNGF for performing a camera shake warning is reset. If the interchangeable lens is a camera shake correction lens, the microcomputer μ
The camera shake determination and the camera shake correction are performed by C3, and a signal indicating the presence / absence of a camera shake warning is sent to the body. This will be described later.

Next, the operation of data transfer from the camera shake detection device BL to the microcomputer μC1 in the body will be described.
When the microcomputer μC1 in the body receives a signal at which the terminal CSBL of the camera shake detection device BL changes from “High” level to “Low” level, the microcomputer D1 shown in FIG.
Execute T. In this interrupt, first, the subroutine of data communication II is executed in # 940, and the camera shake detection device BL
6-byte data sent from the server is input. Then, in # 945, the interchangeable lens is replaced with the camera shake correction lens NBL.
Is determined, and if the lens is a camera shake correction lens, the subroutine of lens communication B is executed in # 950. If the lens is not a camera shake correction lens, skip # 950 and return. .

Data communication with the above-mentioned camera shake detection device BL
The subroutine of II is shown in FIG. When the subroutine is called, the microcomputer μC1 in the body is also connected to the terminal CSBL.
Is set to the “Low” level, the microcomputer μC1 in the body outputs a serial communication clock, and in synchronization with this,
Six 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, FIG. 9 shows a subroutine of the lens communication B described above. When this subroutine is called, the microcomputer μC1 in the body sets the terminal CSLE to the “Low” level to indicate that communication with the lens is to be performed.
Serial communication for inputting 2 bytes of data from the lens side and simultaneously outputting 2 bytes of data is performed, and then outputting 7 bytes of data, and setting the terminal CSLE to “H”.
and the data transfer is terminated (# 185).
~ # 197). The 7-byte data includes the camera shake correction amounts Δk and Δl, the start signal / end signal of camera shake correction,
The presence / absence of the release signal and microcomputer stop signal, the control shutter speed, the integration time TI of the CCD area sensor in the camera shake detection device BL, the moving speed Q of the image blur, and the sum T of the integration time and the calculation time of the CCD area sensor.
There is.

Next, flowcharts for controlling the microcomputer μC3 in the lens (in particular, controlling the lens for correcting camera shake) will be described with reference to FIGS. The lens is attached to the body, and the lens attachment detection switch S _LE is turned from ON to OFF
Or the voltage V _DD supplied from the body to the lens rises above the operating voltage,
When the EIC detects, the reset terminal RE3 of the microcomputer μC3 in the lens changes from “Low” level to “High”
When the signal which changes to the level is input, the microcomputer μC3 in the lens executes the reset routine shown in FIG. 32, resets the port and the register, and stops. Note that when an interrupt is generated from the stop state, the clock oscillation is automatically started by the oscillator built in the microcomputer μC3, and when the operation state shifts to the stop state, the clock oscillation is automatically stopped. Is what you do.

When a signal that changes from the “High” level to the “Low” level is input from the microcomputer μC1 in the body to the terminal CSLE of the microcomputer μC3 in the lens, the interrupt routine LCSINT shown in FIG. 33 is executed. First, 2-byte data is input / output, and it is determined whether or not the lens communication is A based on the body status ICPB obtained by the data communication. , And enters an interrupt waiting state (# L5 to # L15).

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

FIG. 34 shows a timer interrupt which is enabled at # L30. In this timer interruption, counters CTk and CTl indicating the lens position are read, respectively, and Nk1, Nk
After the memory as l1, the process returns (# L10
5, # L110). The counters CTk and CTl are pulse motors M3 and M for driving a camera shake correction lens.
4 is counted up when it rotates forward, and is counted down when it rotates reversely, and a pulse output by the microcomputer μC3 in the lens to drive the lens driving amounts ΔNk and ΔNl is output by an internal hard counter. Counting. Since this timer interruption is executed in half (TI / 2) of the integration time TI, (Nk1, N11)
Indicates the lens position at the integration center.

Then, in # L40, it is determined whether or not correction has started. A signal for determining whether or not to start the correction is
It is input from the microcomputer μC1 in the body in lens communication B. If correction is started in # L40, # L45, # L5
Variables Nk1 and Nl1 indicating the lens position of the integration center at 0 are respectively set to 0. If correction is not started, # L45 and # L50
And skip to # L55. In # L55, the count values indicating the lens position at the calculation end time of the 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 integration center to the end of the camera shake detection calculation is performed. The amount is determined by Nk = Nk2-Nk1, and Nl = N12-N11 (# L55- # L70). Then, lens drive amounts ΔN1 and ΔNk necessary for camera shake correction are respectively obtained from the input data Δl and Δk indicating the camera shake amount, and the lens movement amount N from the integration center to the end time of the camera shake calculation is calculated.
k, Nl are subtracted to obtain the actual lens driving amount ΔNk, Δ
Nl is obtained (# L75 to # L90).

FIG. 49 is a graph showing the camera shake amount and the drive amount of the camera shake correction lens. In the figure, B1 is the camera shake amount P
And L1 indicates a lens drive amount for correcting this. The shaded area sandwiched between the two lines B1 and L1 is the amount of camera shake caused by driving the camera shake correction lens. .. Indicate integration time, and C1, C2, C3, C4,. In the first camera shake detection, the camera shake amount (ΔNk, ΔNl) obtained as a result of the calculation at the calculation time C1 is the camera shake amount at the first integration center. Based on this, the camera shake correction lens is driven. The second integration is performed after the operation time C1. The camera shake amounts (ΔNk, ΔNl) obtained by the second calculation are calculated based on the lens positions (Nk1, Nk).
l1). 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.
(Nk2-Nk)
, Nl2-Nl1) with the camera shake amounts (ΔNk, ΔN
What is subtracted from l) is the actual lens drive amount.

Next, the microcomputer μC3 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, N13 = N12 + 10
Nl is obtained (# L150, # L155). Gk, whose absolute values | Nk3 | and | Nl3 | are physical correction limit values (limits at which the correction lens hits the lens barrel), respectively.
Greater than or equal to a value obtained by adding the tolerance value ε to _{G L (# L160, # L165} ). Absolute value | Nk3 |, | N
If at least one of l3 | exceeds a predetermined value, # L193
Proceed to. On the other hand, the absolute value | Nk at # L160 and # L170
If both 3 | and | Nl3 | do not exceed the predetermined values, the respective correction amounts ΔNk and ΔNl are added to the reference amount δ that moves per unit time by the integration time and the calculation time required last time (the brightness is the same as the previous time). The calculation time is assumed to be substantially the same, and the calculation time is fixed).
L170, # L175). When the correction amount ΔNk or ΔNl is δ
If xT is exceeded, it is determined that the camera shake cannot be sufficiently corrected, and the process proceeds to # L185. In # L185, it is determined whether or not a value obtained by multiplying the camera shake speed Q by the actual time Ts of the shutter speed is less than the reference value K _TH . Even if the measured camera shake speed Q is large, if the actual time Ts of the shutter speed is short, the camera shake amount is small, so that no camera shake warning is given at this time. #L
185, the camera shake amount Q × Ts is smaller than the reference value K _TH , or # L170, # L175, the correction amount ΔNk,
If ΔN1 is equal to or smaller than δ × T, the process proceeds to # L187 to determine whether or not the flag RLF indicating that the shutter is being released is set. Flag RL at # L187
If F is set, return immediately. This is to prevent a warning signal set once during release from being reset. On the other hand, when the flag RLF is not set, it is determined that the release is not being performed, and
A warning signal indicating that camera shake has occurred (or correction has not been completed) is reset (# L188). next,
In # L189, it is determined whether or not a release signal has been sent from the camera. If no release signal is sent,
The flag RLF indicating this is reset, and if it has been sent, the flag RLF is set, the warning signal is reset, and the process 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).
A warning signal is set, and it is determined whether or not a flag RLF indicating that the shutter is released is set. If the flag RLF is set, the process returns.
189 (# L193, # L194).

After the execution of the camera shake determination subroutine in # L95 of FIG. 33, the microcomputer μC3 in the lens
At L100, a lens driving subroutine for camera shake correction is executed, and an interrupt waiting state is set. FIG. 36 shows this lens driving subroutine. 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 microcomputer μC3 in the lens. First, the microcomputer μC3 in the lens uses
Flag MOVF indicating that the lens is being driven in the direction
Is set. Next, it is determined whether or not the absolute value | ΔNk | of the lens drive amount in the k direction is 0, and the absolute value | ΔNk |
If not, it is determined whether or not ΔNk is positive. If it is positive, one driving pulse in the forward direction is output. If not, one pulse in the reverse direction is output, and 1 is subtracted from | ΔNk |. And newly set to | ΔNk | (# L205 to # L22
5). If the absolute value | ΔNk | is 0 in # L205, k
Assuming that the lens driving in the direction has been completed, the process proceeds to # L255, and a flag M indicating that the lens driving in the 1 direction is being performed.
It is determined whether the OVF has been reset. # L2
If the flag MOVF is reset at 55, it is determined that the lens driving in the 1 direction, which will be described later, has also been completed, and the routine returns. If the flag MOVF is not reset, #L
Proceed to 230. Also, the process proceeds from # L225 to # L230.

In steps # L230 to # L250, it is determined whether or not the absolute value | ΔNl | of the lens drive amount in the 1 direction is 0.
If the absolute value | ΔNl | is not 0, it is determined whether or not ΔNl is positive.
If it is not positive, one drive pulse in the reverse direction is output,
1 is subtracted from | ΔNl | to make it new | ΔNl |.
If the absolute value | ΔNl | is 0 in # L230, it is determined that the lens driving in the l direction has been completed, and the process proceeds to # L260, where l
Flag MOVF indicating that the lens is being driven in the direction
And returns to # L205. Also, the process returns from # L250 to # L205.

Next, the subroutine of lens drive II is shown in FIG.
FIG. First, the microcomputer μC3 in the lens is # L30
A flag M indicating that the lens is being driven in the 1 direction at 0
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 direction is output. If it is not positive, one drive pulse in the normal direction is output.
Is subtracted from 1 to obtain | CTk | (# L305
~ # L325). If the absolute value | CTk | is 0 in # L305, it is determined 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 1 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 routine returns. Flag MO
If the VF has not been reset, the process proceeds to # L335.
Also, the process proceeds from # L325 to # L335.

In steps # L335 to # L355, it is determined whether or not the absolute value | CT1 | of the lens position in the 1 direction is 0. If the absolute value | CT1 | is not 0, it is determined whether or not CT1 is positive. If it is positive, one driving pulse in the reverse direction is output, and if it is not positive, one driving pulse in the normal direction is output, and 1 is subtracted from | CTl | to newly set to | CTl |. If the absolute value | CTl | is 0 in # L335, it is determined that the lens position in the 1 direction has returned to the initial position, and
The process proceeds to L360, where the flag MOVF indicating that the lens is being driven in the 1 direction is reset, and the process returns to # L305.
Also, the process returns from # L355 to # L305. As a result, the lens is driven in the reverse direction by the amount that the lens was 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 the detection and correction of camera shake. Returning to the flow of the microcomputer μC1 in the body in FIG. 6, the microcomputer μC1 outputs data to the camera shake detection device BL in data communication I of # 50, and then outputs 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 data with / without camera shake. When camera shake occurs, the display control circuit DISPC performs display control so that the display of the shutter speed TV blinks.

FIGS. 50 and 51 show this display. In the figure, a, b, and c denote shooting mode displays, which indicate a normal mode, a person shooting mode, and a landscape shooting mode, respectively, and only the selected mode is displayed.
d and e indicate the shutter speed and the aperture value, respectively, and the blinking of the display d of the shutter speed warns that the camera shake is occurring. f and g indicate the display of the direct aperture and the shutter speed in the viewfinder. The blinking of the display g of the shutter speed warns that the camera shake is occurring.

When the display data output of # 55 is completed, the microcomputer μC1 in the body issues the release switch S2 at # 60.
Is turned on / off. If the release switch S2 is OFF at # 60, the photographing preparation switch S is set 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 at # 60,
In step # 62, it is determined whether or not the camera is in focus. If the focus is not achieved in # 62, the processing from # 15 is executed. # 62
If the lens is in focus, the shutter is released in step # 65 and the mirror-up operation is waited in step # 70. When the mirror-up operation is completed, the exposure control subroutine is executed in step # 75.

FIG. 31 shows this exposure control subroutine. When the subroutine is called, first, the microcomputer μC1 in the body determines whether or not the flash photography is performed. S
V data is stored in D /
The data is output to the A converter (# 1300 to # 1302). Thus, the D / A converter converts the data of the film sensitivity SV into an analog signal and outputs the analog signal to the dimming circuit STC. The light control circuit STC integrates the reflected light from the film surface substantially in synchronization with the flash light emission, and outputs a light emission stop signal STP to the flash circuit FLC when a predetermined amount of light is integrated.

The structure of this flash circuit FLC is shown in FIG.
Shown in In the figure, DD is a booster circuit composed of a DC / DC converter, which boosts a DC low voltage V _CC0 to a DC high voltage and stores energy in a capacitor MC for storing light emission energy via a rectifying element DS. EMC is a light emission control circuit, which outputs a signal (FL) output during flash photography.
Flash light emission is started by an AND signal of an X signal that is turned ON upon completion of one curtain run (OK “High” level) and the X signal that is turned on when one curtain travel is completed, and stops emitting light in response to the light emission stop signal STP.

Returning to the flow of FIG. 31, from # 1302,
Alternatively, when the flash shooting is not performed in # 1300, #
Proceeding to 1303, the count value corresponding to the shutter speed (exposure time) is preset in the exposure time counter, the magnet for the one-curtain travel is separated, and the one-curtain travel is started,
Start the exposure time counter (# 1303- # 1)
310). Then, it waits for the counter to finish counting, and if the counting is completed, waits for a certain period of time, sets the terminal FLOK to the “Low” level for the time required from the start of the second curtain running to the completion of the running, and executes the lens communication B subroutine. Then, the completion of the exposure is notified to the in-lens circuit LE (# 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 data for camera 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”.
The signal which changes to the “gh” level is output, and the process returns after the detection of camera shake (# 1335).

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

When the subroutine of the exposure control is completed in step # 75 of FIG.
Controls frame winding. After the completion of the winding, it is determined whether or not there is a camera shake during the exposure, based on the data from the lens for the camera shake correction lens. . If there is a camera shake, data for warning display is set in # 95. If there is no camera shake, display data without warning is set in # 100, and display data is set in the display control circuit DISPC in # 102. Is output and the display is performed. Next, it is determined whether or not the photographing preparation switch S1 is turned on in # 105. # 1
If the shooting preparation switch S1 is ON at 05, # 9
Go to 0. Shooting preparation switch S in # 105 or # 130
1 is OFF, the power supply transistors Tr1, Tr
2 is turned off, and the data for display erasure is displayed in the display control circuit DIS.
Output to PC to delete display, microcomputer μC in lens
The OFF signal of No. 3 is set, the subroutine of lens communication B is executed, and the operation is stopped (# 110 to # 125).

[0092]

According to the present invention, the speed of a blur is detected, and given photographing conditions are changed based on the detected speed of the blur.
It is determined whether the blur correction can be performed by the operation of the blur correction unit without any further operation, or whether the blur correction cannot be performed even if the blur correction unit operates. If it is determined that the photographing is not possible, a warning is issued, and the photographer can stop the photographing, correct the manner of holding the photographing, and the like in accordance with the warning.

[Brief description of the drawings]

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

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

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

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

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

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

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

FIG. 8 is a fourth flowchart illustrating the operation of the camera according to one embodiment of the present invention.

FIG. 9 is a fifth flowchart illustrating the operation of the camera according to one embodiment of the present invention.

FIG. 10 is a sixth flowchart illustrating the operation of the camera according to one embodiment of the present invention.

FIG. 11 is a seventh flowchart illustrating the operation of the camera according to one embodiment of the present invention.

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

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

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

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

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

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

FIG. 18 is a fourteenth flowchart for explaining the operation of the camera according to one embodiment of the present invention.

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

FIG. 20 is a sixteenth flowchart for explaining the operation of the camera according to one embodiment of the present invention.

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

FIG. 22 is an eighteenth flowchart for explaining the operation of the camera according to one embodiment of the present invention.

FIG. 23 is a nineteenth flowchart illustrating the operation of the camera according to one embodiment of the present invention.

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

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

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

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

FIG. 28 is a twenty-fourth flowchart for explaining the operation of the camera according to one embodiment of the present invention.

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

FIG. 30 is a twenty-sixth flowchart for explaining the operation of the camera according to one embodiment of the present invention.

FIG. 31 is a twenty-seventh flowchart for explaining the operation of the camera according to one embodiment of the present invention.

FIG. 32 is a twenty-eighth flowchart for explaining the operation of the camera according to one embodiment of the present invention;

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

FIG. 34 is a thirtieth flowchart for explaining the operation of the camera according to one embodiment of the present invention.

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

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

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

FIG. 38 shows a first example used for a camera according to an embodiment of the present invention.
FIG. 3 is an AE program diagram of FIG.

FIG. 39 shows a second camera used in the camera according to the embodiment of the present invention.
FIG. 3 is an AE program diagram of FIG.

FIG. 40 is a diagram illustrating a third example of the camera according to the embodiment of the present invention.
FIG. 3 is an AE program diagram of FIG.

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

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

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

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

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

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

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

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

FIG. 50 is a diagram illustrating a first example used in the camera according to the embodiment of the present invention.
FIG. 5 is a diagram showing a display state of a display unit of FIG.

FIG. 51 shows a second example used for the camera according to the embodiment of the present invention.
FIG. 5 is a diagram showing a display state of a display unit of FIG.

[Explanation of symbols]

 μC1 Body microcomputer LE circuit

──────────────────────────────────────────────────続 き Continuing on the front page (72) Eiji Yamakawa 2-3-1-13 Azuchicho, Chuo-ku, Osaka-shi Inside the Osaka International Building Minolta Co., Ltd. (72) Hiroshi Mukai 2-3-3 Azuchicho, Chuo-ku, Osaka-shi No. 13 Osaka International Building Minolta Co., Ltd. (72) Inventor Hisayuki Masumoto 2-3-13 Azuchicho, Chuo-ku, Osaka-shi Osaka International Building Minolta Co., Ltd. (72) Inventor Naoshi Okada Azuchi, Chuo-ku, Osaka-shi 2-3-13 Machi, Osaka International Building Minolta Co., Ltd. (72) Inventor Takehiro Kato 2-3-13, Azuchicho, Chuo-ku, Osaka-shi Osaka International Building Minolta Co., Ltd. (72) Hiroshi Otsuka, Inventor Osaka 2-3-3 Azuchicho, Chuo-ku, Osaka Osaka International Building Minolta Co., Ltd. (56) References JP-A-63-125923 (JP, A) JP-A-1 -131521 (JP, A) JP-A-1-131522 (JP, A) JP-A-62-196639 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 5/00 G03B 17/00 G03B 17/18

Claims (2)

(57) [Claims] 1. A blur correction means for correcting a blur of an image, a blur detection means for detecting a speed of a blur, and a photographing condition given based on the speed of the detected blur.
Determining means for determining whether blur correction can be performed by the operation of the shake correcting means without change , or whether blur correction is not possible even when the blur correcting means operates; A warning unit that, when it is determined that the correction is impossible, displays that the blur correction is impossible. 2. The camera according to claim 1, wherein photographing is permitted regardless of whether or not a warning is displayed by said warning means.