JPH0829828A - Camera capable of bracketing-photographic and bracketing photographic method - Google Patents

Abstract

PURPOSE:To execute a bracketing photographing while changing plural kinds of photographing conditions into optimum order by executing the photographing of set times while changing plural kinds of photographing conditions set by a setting means. CONSTITUTION:A bracketing switch 14 is for setting a bracketing mode and outputting bracketing mode information. A setting switch 15 is for setting various kinds of parameters in the bracketing mode and outputting bracketing setting information. The photographing of previously set times is carried out while plural kinds of photographing conditions such as the combination of a shutter speed with stop with respect to, for instance, the focusing state of a photographing lens, an exposure, a flashing quantity, the focal distance of a zoom lens and a proper exposure value which are set in advance are changed. Therefore, operability is improved compared with that when the bracketing photographing is carried out every kind of photographing conditions and a photograph in optimum photographing conditions can be taken without missing a shutter release opporotunity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera equipped with a bracketing function for shooting a plurality of times while changing a plurality of kinds of shooting conditions, and a bracketing shooting method.

[0002]

2. Description of the Related Art A camera capable of auto-bracketing photography is known in which exposure is changed stepwise and a plurality of times of photography is performed. With this type of camera, when it is difficult to determine the proper exposure value due to subtle differences in brightness within the shooting screen, for example, the exposure value can be adjusted in steps of 1/3 to 1/2 to a maximum of ± 8 steps. The range is changed stepwise to the range of, and, for example, automatic shooting is performed continuously for a set number of frames from 3 to 19.

By the way, there are cases where it is desired to perform bracketing photography while changing a plurality of types of photography conditions. For example, if the bracketing shooting can be performed while changing the focus adjustment state and the exposure of the shooting lens, the operability is improved as compared with the case where the bracketing shooting is performed separately, and a photo opportunity is not missed.

In bracketing photography in which a plurality of types of photography are performed while changing a plurality of types of photography conditions, a plurality of photography methods can be considered depending on the order of changing the photography conditions. Bracketing shooting that changes the focus adjustment status of the shooting lens in the case of bracketing shooting in which the shooting lens focus adjustment status and other types of shooting conditions are combined with multiple types of shooting conditions (in the following, focus bracketing shooting or If the operation of the focus bracketing mode) and the bracketing shooting operation of changing other kinds of shooting conditions are simply alternately executed, the following problems occur. Assuming that the number of times of focus bracketing shooting is M times and the number of times of bracketing shooting of other types of shooting conditions is N times, the shooting lens must be moved M × N times until the bracketing shooting of this combination is completed. Therefore, (1) The power consumption of the actuator for driving the taking lens increases. (2) Since it takes time to move the taking lens only M × N times, the time required for this bracketing shooting also becomes long, and it is intended that there are changes in subject conditions such as shooting distance and exposure during shooting. The shooting result may not be obtained. (3) Generally, when driving a taking lens with a motor, the stop accuracy within an allowable response time is ± 50 to several tens.
It is about 0 μm, and the N times of photographing results of other kinds of photographing conditions that require photographing at the same focus position are
In some cases, the defocus amount may differ by several hundred μm.

An object of the present invention is to provide a camera and a bracketing photographing method for performing bracketing photographing while changing plural kinds of photographing conditions in an optimum order.

[0006]

The present invention will be described with reference to FIG. 1 showing an embodiment. In the invention of claim 1, setting means 14, 1 for setting a plurality of types of photographing conditions and the number of times of photographing are set.
5, and the bracketing photographing means 8, 12, 16 for photographing the set number of times while changing the plural kinds of photographing conditions set by the setting means 14, 15, thereby achieving the above object. The plurality of types of shooting conditions of the camera capable of bracketing shooting according to claim 2 include a focus adjustment state of a shooting lens, exposure, a flash emission amount, a focal length of a zoom lens, and a combination of a shutter speed and an aperture with respect to an appropriate exposure value. Be done. In the camera capable of bracketing shooting according to claim 3, two or more of exposure, shooting speed and aperture combination with respect to proper exposure value, and flash emission amount are simultaneously set by the setting means 14 and 15. The thing is to prohibit. The camera capable of bracketing photographing according to claim 4,
The setting means 14 and 15 prohibit the simultaneous setting of three or more kinds of photographing conditions. The camera capable of bracketing photographing according to claim 5 comprises an unexposed frame number detecting means 8 for detecting the number of unexposed frames of the film,
When the number of times of photographing set by the setting means 14, 15 by the bracketing photographing means 8, 12, 16 is larger than the number of unexposed frames detected by the unexposed frame number detecting means 8, the bracketing photographing is not performed. It is the one. The camera capable of taking bracketing images according to claim 6 is configured by the setting means 1 by the bracketing imaging means 8, 12, and 16.
When the focus adjustment state of the photographing lens is set to one of a plurality of kinds of photographing conditions in 4 and 15, first, the focus adjustment state of the photographing lens is changed, and then another type of focus adjustment state is changed. The procedure is such that bracketing shooting is performed while changing shooting conditions, and then the procedure of changing the focus adjustment state of the shooting lens is repeated. Claim 7
The cameras capable of taking bracketing images are set by the bracketing image capturing means 8, 12, and 16 by the setting means 14, 15.
When the focal length of the zoom lens is set to one of multiple types of shooting conditions, first change the focal length of the zoom lens and then change other types of shooting conditions at that focal length. It takes bracketing shots and then repeats the procedure for changing the focal length of the zoom lens. According to the eighth aspect of the camera capable of bracketing photographing, the flash emission amount is determined based on the guide number without performing light control. The invention of claim 9 provides a bracketing photographing method,
The above object is achieved by adopting a method of performing a plurality of photographing operations while changing a plurality of preset photographing conditions. In the bracketing photographing method according to claim 10, when the focus adjustment state of the photographing lens is set to one of a plurality of kinds of photographing conditions, the focus adjustment state of the photographing lens is first changed, and then the focus adjustment is performed. In this state, bracketing photography is performed while changing other types of photography conditions, and then the procedure of changing the focus adjustment state of the taking lens is repeated. In the bracketing photographing method of claim 11, when the focal length of the zoom lens is set to one of a plurality of photographing conditions, first, the focal length of the zoom lens is changed, and then the other focal length is changed. The bracketing shooting is performed while changing the shooting conditions of the type, and then the procedure of changing the focal length of the zoom lens is repeated.

[0007]

[Function] It is preset while changing a plurality of kinds of photographing conditions such as a preset focus adjustment state of the photographing lens, exposure, flash emission amount, focal length of the zoom lens, combination of shutter speed and aperture for proper exposure value. Take a number of shots. As a result, operability is improved as compared with the case where bracketing shooting is performed for each type of shooting conditions, and a photograph with optimum shooting conditions can be obtained without missing a photo opportunity. Note that it is prohibited to set any two or more of the exposure conditions, the combination of the shutter speed and aperture for the proper exposure value, and the flash emission amount at the same time, and three or more types of shooting conditions are set at the same time. It is also prohibited. This prevents bracketing shooting that is complicated and exceeds the maximum number of shooting frames on the film. When the focus adjustment state of the taking lens is set to one of multiple types of shooting conditions,
First, the focus adjustment state of the photographing lens is changed, then bracketing photographing is performed while changing other kinds of photographing conditions in the focus adjustment state, and then the procedure of changing the focus adjustment state of the photographing lens again is repeated. When the focal length of the zoom lens is set to one of the multiple types of shooting conditions, the focal length of the zoom lens is changed first, and then the other types of shooting conditions are changed at that focal length. While taking bracketing shots, repeat the procedure to change the focal length of the zoom lens again.
As a result, the number of times the photographing lens or the zoom lens is driven is reduced, and the power consumption of the drive actuator is reduced. Also, since the time required to move the shooting lens or zoom lens is shortened and the time required for bracketing shooting is also shortened, the probability of subject conditions changing during shooting is reduced, and the intended shooting result may be obtained. Get higher Furthermore, in a plurality of times of photographing under other kinds of photographing conditions that require photographing at the same lens position, photographing can be performed at the completely same lens position.

Incidentally, in the section of means and action for solving the above problems for explaining the constitution of the present invention, the drawings of the embodiments are used for the purpose of making the present invention easy to understand. It is not limited to.

[0009]

FIG. 1 is a functional block diagram showing the structure of an embodiment. The lens 2 is replaceable with respect to the camera body 1, and the figure shows a state in which the lens 2 is mounted on the camera body 1. In the lens 2, there is a photographing optical system 3,
The light flux from the subject that has passed through the photographic optical system 3 is reflected by the main mirror 4 which is a half mirror and the sub-mirror 5.
And the direction of the finder 17. The finder 17 is composed of a well-known pentaprism, and a display 18 for superimposing display of a transmissive liquid crystal device or an electrochromic device is arranged on the screen surface thereof. This allows the photographer to visually recognize various information by superimposing it on the subject image on the photographing screen.
Further, the photometric device 10 arranged in the finder 17 measures the subject brightness through the photographing optical system 3 and outputs photometric information. This photometric information is used for exposure control.

The light flux from the subject, which is deflected toward the bottom of the body by the sub-mirror 5, is guided to a focus detection device 7 arranged near a plane conjugate with the planned focal plane (film surface) 6 of the photographing optical system 3. The focus detection device 7 includes a well-known focus detection optical system, an image sensor, an arithmetic processing circuit, and the like, and defocus information (defocus amount and defocus direction) of the image plane of the photographing optical system 3 with respect to the planned focal plane 6. To calculate. The release switch 13 detects a half-pressed state and a fully-pressed state of a release button (not shown) and outputs it as release information. It should be noted that when the release button is half-pressed, the photometric operation and the focus adjustment operation are performed, and when the release button is fully pressed, the shooting operation is performed. The bracketing switch (BK switch) 14 is for adjusting the focus of the taking lens,
This is a switch for setting the type of shooting conditions in bracketing shooting such as exposure, flash emission amount, focal length of zoom lens, combination of shutter speed and aperture for proper exposure value, that is, bracketing mode information. Is output. The setting switch 15 is a switch for setting various parameters in the bracketing mode, and outputs bracketing setting information. The bracketing mode information and the bracketing setting information will be described later. Further, the light control device 19 monitors the amount of light from the subject during flash photography and outputs light control information.

The photometric information, defocus information, release information, bracketing mode information, bracketing setting information, and dimming information described above are input to the control circuit 8. The control circuit 8 is composed of a microcomputer and its peripheral parts, and executes a control program described later to perform various calculations and controls. The control circuit 8 sets the exposure, the combination of the shutter speed and the aperture for the proper exposure value, and the bracketing mode of the flash emission amount when two or more kinds are simultaneously set by the bracketing switch 14 and set those settings. Prohibit and display 18
Warning is displayed. Also, bracketing switch 1
When three or more kinds of photographing conditions, that is, three or more kinds of bracketing modes are set by 4, the setting is prohibited and a warning is displayed on the display unit 18. Control circuit 8
Determines the proper exposure value (shutter speed and aperture value) based on the photometric information. Further, the control circuit 8 determines the driving amount of the focus lens of the photographing optical system 3 for focusing the photographing optical system 3 based on the defocus information, and the focus control device 9 of the lens 2 according to the lens driving amount. To control. The focus control device 9 is composed of an actuator such as a motor, and moves the focus lens of the photographing optical system 3 mechanically coupled to this actuator. When the shooting operation is activated according to the release information, the control circuit 8 controls the shutter 16 and the aperture control device 11 in the lens 2 so as to obtain an appropriate exposure value, and also controls the winding mirror up device 12 to shoot. Take action. Further, the control circuit 8 controls the amount of light emitted from the flash 20 built in the camera body 1 during flash photography according to the dimming information. The control circuit 8 controls the zoom control device 21 in the lens 2 according to the zoom information set by the setting switch 15 or the like, and the photographing optical system 3
Control the focal length of. The zoom control device 21 is composed of an actuator such as a motor, and moves the zoom lens of the photographing optical system 3 mechanically coupled to this actuator. The control circuit 8 also displays the bracketing mode information and the bracketing setting information on the display unit 18 to allow the photographer to confirm the setting state, and at the time of the bracketing photographing, the bracketing set based on the above-mentioned various information. The shutter 16, the aperture control device 11, the winding mirror up device 12, the focus control device 9, the zoom control device 21, and the flash 20 are controlled so that the photographing can be performed.

Table 1 shows setting information relating to the bracketing photographing set by the bracketing switch 14 and the setting switch 15.

[Table 1] As the bracketing mode, the types of shooting conditions that are changed for each shooting frame during bracketing shooting include focus (focusing state of shooting lens), exposure, flash emission amount, focal length of zoom lens, and program (for appropriate exposure value). A combination of aperture value and shutter speed), etc., and these are used alone or in combination to perform bracketing photography.

The reference value, that is, the appropriateness of the shooting condition at the bracketing shooting is set as shown in Table 1 for each bracketing mode. (1) Regarding the focus, there are AF for focusing the photographing optical system 3 based on the defocus amount detected by the focus detection device 7 or M for manually adjusting the focus of the photographing optical system 3. (2) Regarding exposure, there are AE for determining an appropriate exposure value based on the photometric information detected by the photometric device 10 and M for manually setting the exposure value. (3) As for the flash, there is AS that determines an appropriate light emission amount based on the light adjustment information detected by the light control device 10 or M that manually sets the light emission amount. (4) Regarding zoom, the focal length is automatically determined based on the set distance of the lens so as to obtain a predetermined magnification A
There is Z or M that sets the focal length manually. (5) Regarding the program, the program changes the combination of the shutter speed and the aperture with respect to the appropriate exposure value determined based on the photometric information detected by the photometric device P,
Alternatively, there is M to manually change the combination of the shutter speed and the aperture for the proper exposure value.

Further, the number of times of bracketing photographing can be set for each bracketing mode. The control circuit 8 compares the current number of frames to be photographed stored in the non-volatile memory with the number of shootable films, and if the set number of bracketing shots exceeds the number of shootable images, it is displayed at the time of setting. A warning is given by the device 18, and the number of times of bracketing shooting is automatically reduced to the number of shootable films. In this way, the film can be replaced if necessary when a warning is given. As shown in Table 1, the number of times of the focus bracketing mode is M, and the number of times other than the focus bracketing mode is N.

Further, a difference from an initial value, that is, a reference value of the shooting condition of the first frame of bracketing shooting can be set for each bracketing mode. In focus bracketing mode, defocus amount or aperture initial value FI
In the exposure, flash, and program bracketing modes, for example, EV (EX
POSURE VALUE) initial values EI, SI, PI
Is set, and the initial value ZI of the focal length is set in the zoom bracketing mode.

Furthermore, the steps of shooting conditions at the time of bracketing shooting are automatically set for each bracketing mode.
Alternatively, it can be set manually. In the focus bracketing mode, the focus step for focus adjustment is determined in relation to the depth of focus according to the shooting aperture value when the step is set by the automatic A, and when the manual step is set by the manual M, for example, 1 is set.
A specific defocus amount such as 00 μm or an aperture value such as F2.8 is designated.

Other items can be designated for each bracketing mode. In the focus bracketing mode, the drive direction of the focus lens can be specified. For example, as shown in FIG. 2, when the driving direction is the extension direction from the infinity side to the close-up side, the focus lens moves from the reference position shown by ● to the initial position shown at 1 during the bracketing shooting to shoot the first frame. Then, the focus lens is extended by the set step next, the second frame is photographed, and this is repeated to perform the designated M times of bracketing photographing. When the driving direction is the inward direction from the close-up side to infinity, the focus lens moves from the reference position indicated by ● to the initial position indicated by 1 during the bracketing shooting to shoot the first frame, and then set the next setting. The focus lens is retracted for the designated steps to shoot the second frame, and this is repeated to perform the specified M times of bracketing shooting. However, if the direction is not specified, the renormalization direction is the default. The reason is,
This is because the front-focused photograph is generally preferred to the rear-focused photograph, so that the first frame, which has little time elapsed after the composition is determined and has little change due to the movement of the subject, is set as the front-focused photograph.
It should be noted that if the number of times M of shooting is set to 1 in the focus bracketing shooting, shooting can be performed at a focus position that is offset by a desired amount from the focus position of the focus detection device 7 at the time of automatic focus shooting. There is also the advantage that fine adjustments can be made manually. In addition, since the backlash of the mechanical transmission mechanism from the actuator to the focus lens can be ignored by moving the focus lens in one direction and performing bracketing shooting as described above, it is possible to control the focus position with high accuracy. There are also advantages. Further, as shown in FIGS. 2 and 3, even when the lens is driven to the focal position of the first frame, the lens must be driven from the designated driving direction and stopped in order to eliminate the influence of backlash. Lens drive control is performed.

Next, in the exposure bracketing mode, it is possible to select either the aperture or the shutter speed to change the exposure value. However, when combining exposure bracketing and focus bracketing, the aperture is fixed and the shutter speed is changed to secure the depth of focus. In this way, the depth of focus is constant during a series of shootings, and the effect of focus bracketing is not buried in the depth of focus. In the exposure bracketing mode, the order of exposure changes can be specified. For example, if the order is specified as +, as shown in FIG. 4, the first frame is shot as an initial exposure value (indicated by ● 1 in the figure) obtained by offsetting the exposure value from the reference value by the initial value during bracketing shooting. Then, the exposure value is increased by the next set step, the second frame (shown by ● 2) is photographed, and this is repeated to photograph the designated number N of times. On the contrary, if the order is designated as −, as shown in FIG. 5, the exposure value is set to the initial exposure value (indicated by ● 1 in the figure) during the bracketing shooting, the first frame is shot, and the next setting is made. The exposure value is decreased by steps and the second frame (shown by ● 2) is photographed, and this is repeated to photograph the designated number N of times. Further, if the order is alternately specified, as shown in FIG. 6, the initial value setting is ignored, and the exposure value is used as a reference value (indicated by ● 1 in the figure) during the bracketing shooting, and the first frame is shot. Next, the exposure value is decreased by the set step and the second frame (indicated by ● 2) is taken, then the exposure value is increased by twice the step and 3
Photographing of the frame (indicated by ● 3) is performed, and the exposure value is repeatedly raised and lowered in this manner to perform the photographing of the designated number N.

In the flash bracketing mode, the order of changing the light emission amount can be designated. For example, if the order is specified as +, as shown in FIG. 7, the flash emission of the first frame is set as the initial light emission amount (indicated by ● 1 in the figure) obtained by offsetting the light emission amount from the reference light emission amount by the initial value during the bracketing shooting. And increase the amount of light emitted by the next set step to 2
The flash photography of the frame (indicated by ● 2) is performed, and the flash photography of the designated number N is repeated by repeating this. Further, when the order is designated as −, as shown in FIG. 8, the flash light emission of the first frame is performed with the light emission amount as the initial light emission amount (indicated by ● 1 in the figure) during the bracketing shooting, and the next setting is performed. Decrease the amount of light emitted only in steps to the second frame (indicated by ● 2)
Flash photography is repeated, and this is repeated to perform flash photography a designated number of times N. When the order is further specified alternately, the initial value setting is ignored, as shown in FIG.
When shooting in bracketing, the flash output is the reference flash output (
(1) flash photography of the first frame, then decrease the light emission amount by the next set step, then flash photography of the second frame (shown by ● 2), and then double the light emission amount of the step , And the flash photography of the third frame (indicated by ● 3) is performed, and the exposure value is repeatedly raised and lowered in this way to perform the flash photography of the designated number N. The flash emission amount may be controlled so as to be a predetermined emission amount by performing light adjustment, or may be determined based on the guide number without performing light adjustment.

In the zoom bracketing mode, the order of changing the focal length can be designated. For example, if the order is designated as +, as shown in FIG. 10, the first frame is shot as the initial focal length (indicated by ● 1 in the figure) obtained by offsetting the focal length from the reference focal length by the initial value during bracketing shooting. Do the following, and increase the focal length by the set step, then 2
The frame (shown by ● 2) is photographed, and this is repeated to photograph the designated number of times N. Further, when the order is designated as-, as shown in FIG. 11, the first frame is photographed with the focal length as the initial focal length (indicated by ● 1 in the figure) during the bracketing photographing, and the step set next. Then, the focal length is shortened, and the second frame (indicated by ● 2) is photographed, and this is repeated to photograph the designated number N of times. Further, if the order is alternately specified, as shown in FIG. 12, the initial value setting is ignored, and the first frame is shot with the focal length as the reference focal length (indicated by ● 1 in the figure) during the bracketing shooting. , The focal length is shortened by the next set step and 2
The first frame (shown by ● 2) is shot, then the focal length is lengthened by twice the step, and the third frame (shown by ● 3) is shot. The photographing is performed N times specified.

In the program bracketing mode, the order of changing the aperture or shutter speed can be specified. For example, if the order is designated as +, as shown in FIG. 13, the aperture value at the time of bracketing shooting is set to 1 as an initial aperture value (indicated by ● 1 in the figure) offset from the reference aperture value determined by the program by the initial value. The second frame (indicated by 2) is captured by increasing the aperture value by the set step, and this is repeated for the specified number of times N. Also, if the order is designated as-,
As shown in, the first frame is shot with the aperture value as the initial aperture value (indicated by ● 1 in the figure) during bracketing shooting.
The second step (●
2) is performed, and this is repeated to perform the designated number N of times. Further, if the order is designated alternately, as shown in FIG. 15, the initial value setting is ignored and one frame is set as the reference aperture value (indicated by ● 1 in the figure) determined by the program during the bracketing shooting. Take a picture of your eyes, then lower the aperture by the set step and
The first frame (shown by ● 2) is shot, then the aperture value is increased by twice the step, and the third frame (shown by ● 3) is shot. The number of shots N is performed.

The control circuit 8 performs the bracketing photographing by the setting parameter within the control range of each control device based on the parameters such as the number of times, initial value, step, direction or order and the control range of each control device. It is judged whether or not it is possible. If the control range of each control device is exceeded, a warning is given on the display 18 when setting the parameter, and the parameter is automatically adjusted so as to be within the control range of each control device. This allows the photographer to adjust the parameters and replace the lens when the warning is issued. For example, in the focus bracketing mode, the control circuit 8
Detects the absolute position of the focus lens,
When the focus positions 1 to M shown in FIG. 2 exceed the drivable range from the closest end to the infinite end of the focus lens, a warning is displayed. Further, for example, in the exposure bracketing mode, the control circuit 8 detects the shutter speed control range of the shutter 16 or the aperture control range of the aperture control device 11, and the exposure range 1 to N shown in FIG. 4 is the shutter speed control range. Or, when the aperture control range is exceeded, a warning is displayed. Further, for example, in the flash bracketing mode, the control circuit 8 detects the light emission amount control range of the flash 20, and if the light emission amount range of 1 to N shown in FIG. To do. Furthermore, for example, in the zoom bracketing mode, the control circuit 8 detects the focal length control range of the zoom control device 21, and when the focal length range of 1 to N shown in FIG. 10 exceeds the focal length control range. Display a warning.

The parameters and the like in the bracketing photographing are set while looking at the display device 18. When the focus bracketing mode is set by the bracketing switch 14, the display 18 displays a part or the whole of the finder screen as shown in FIG. In the display example shown in FIG. 16, the number of times of bracketing photographing M is 5, the direction is the front pin (extending direction), the step is 100 μm,
The initial position is set to 200 μm on the rear pin. The bar graph at the bottom of the figure is a visual display of the actual procedure of bracketing shooting with each parameter set as described above, and the horizontal line shows the defocus dimension, the reference The vertical position in the center is the vertical line, the focal position during bracketing shooting is ●, the bracketing direction is an arrow, and the depth of focus scale (100 μm) is a short vertical line. It has an advantage that the setting state of each parameter can be easily visually confirmed, and setting and changing can be easily performed. The setting is changed by the setting switch 15 such as a command dial or a setting button.

When the AE bracketing mode is set, a part of the finder screen is displayed on the display 18 or on the entire screen.
The display is as shown in. In the display example shown in FIG. 17, the number N of bracketing shots is set to 3, the direction is set to −, the step is set to 1/2 EV, and the initial value is set to 0 EV (offset from the reference exposure value). The bar graph at the bottom of the figure is a visual display of how the bracketing shooting with each parameter set as described above is actually performed.The horizontal line shows the exposure change and the reference exposure value is the center. Vertical line, the exposure value during bracketing shooting is ●, the bracketing direction is an arrow, and the exposure scale (1E
V) are displayed by short vertical lines.

Further, during the bracketing shooting, only the bar graph display is displayed on the display 18 as shown in FIG. FIG. 18 shows the focus bracketing shown in FIG. 16 and FIG.
Shown is an example of a display during bracketing shooting in combination with exposure bracketing shown in, where ● indicates that the image has been shot and ○ indicates that the image has not been shot. The photographer can grasp the progress of the bracketing shooting while looking at this display, and depending on the situation, the bracketing shooting can be stopped midway.

FIG. 19 is an explanatory diagram of the shooting sequence when M × N times of bracketing shooting is performed by combining focus bracketing of the shooting count M and exposure bracketing of the shooting count N, and the horizontal axis represents the lens position. (The focus adjustment state of the taking lens), the vertical axis represents the exposure value, ● represents the shooting operation, and the arrows represent the order. In this embodiment, after changing the exposure value at the same lens position for exposure bracketing photography, the lens is moved to repeat exposure bracketing photography at another lens position. In this way, the lens position need only be moved M times, the time required for bracketing shooting can be shortened, and the focus positions in each focus bracketing shooting can be guaranteed to be exactly the same.

In general, variations in the focus adjustment position occur due to the precision of lens drive control, and this variation amount is an amount that cannot be ignored with respect to the focus step. Therefore, when combining focus bracketing shooting and other bracketing shooting, the procedure for performing bracketing shooting other than focus at the same lens position as described above, and then moving the lens position and performing another bracketing shooting again. By doing so, the focus positions become completely the same in a series of other bracketing photography with respect to a certain focus position, and it is possible to solve the above-mentioned problem of variation in focus adjustment. Further, the control circuit 8 records the photographing information at the time of the bracketing photographing optically or magnetically on the film by a data writing device (not shown). For example, the focus setting state is recorded with the defocus amount with respect to the reference value, and the exposure setting state is recorded with the number of exposure steps with respect to the reference exposure value.

In the above description, the steps of various control amounts at the time of bracketing shooting are uniformly set to a constant value, but they may be set at unequal intervals. For example, in the focus bracketing mode, open the aperture only near the reference focus position and perform bracketing shooting in fine defocus steps, narrow the focus depth away from the reference focus position to increase the depth of focus, and use the coarse defocus step in focus bracketing. Take a shooting shot. In this way, the number of frames to be photographed can be saved, and focus bracketing photography covering a wide range of depth of focus is possible.

Further, when the reference position in focus bracketing photography is determined by the focus detection device 7, it is more convenient to lock the reference position. Therefore, during focus bracketing photography, the lens drive mode is used after the focus detection and the lens is detected. The locked lens position may be used as the reference position in a so-called one-shot mode in which the drive is locked.

FIG. 20 is a flow chart showing the control program of the microcomputer. The operation of the embodiment will be described with reference to this flowchart. Here, an example in which focus bracketing and exposure bracketing are combined will be described. In step S1,
The microcomputer starts executing this control program when the power of the camera (not shown) is turned on. In step S2, it is determined whether or not it is the bracketing mode based on the bracketing mode information. If it is not the bracketing mode, the process proceeds to step 3, the well-known AF camera normal mode operation is performed, and the process returns to step S1 again. When the bracketing mode is set, in step S4,
Parameters such as the bracketing mode, the number of times, the initial value, the step, and the order are set based on the bracketing setting information. If the bracketing setting information is not input, the default value is set or the setting information at the time of the previous setting is used.

In step S5, the process waits until the release button is half-pressed according to the release information. When the release button is half-pressed, the process proceeds to step S6, and the lens is driven to the in-focus point based on the defocus information. In step S7, it is determined from the release information whether or not the release button has been fully pressed. If not, the process returns to step S5. When the release button is fully pressed, the counter K indicating the number of times of focus bracketing shooting is reset in step S8. In step S9, the lens is driven to the initial focus position for focus bracketing photography. In step S10, a counter L indicating the number of exposure bracketing shots is reset, and the process proceeds to step S11 to set an initial exposure value for exposure bracketing shot. In step S12, a shooting operation is performed according to the set exposure value. The counter L is incremented in step S13 after shooting, and it is determined in subsequent step S14 whether or not the exposure bracketing shooting count L has reached a set value N.
If L = N is not satisfied, the exposure value is changed in step S15 according to the number L of exposure bracketing shootings, and the process returns to S12 again to perform exposure bracketing shooting.

When the exposure bracketing photographing count L reaches the set value N in this way, the process proceeds to step S16 and the counter K is incremented. Next, step S17.
In step S, it is determined whether the number K of times of focus bracketing shooting has reached the set value M. If K = M, step S
Returning to step 2, the above operation is repeated, and the number of shootings K becomes the set value M.
If not reached, the process proceeds to step S18. Step S
In 18, the lens position is changed according to the number of focus bracketing shootings K, and the process proceeds to step S19. In step S19, it is determined from the release information whether or not the release button is fully pressed. If the release button is still fully pressed, the process returns to step S10 to restart exposure bracketing photography. On the other hand, if the release button is released from the full-pressed state, the focus bracketing operation is stopped in step S19, and the process returns to step S2 to repeat the above operation. This way, while observing the Fider,
If the situation of the subject changes, you can stop the bracketing shooting in the middle, and the break in the bracketing shooting when you stop shooting always changes the number of focus bracketing shootings. It is convenient to organize. It should be noted that step S19 is not always necessary and can be omitted to omit step S1.
You may make it return from 8 to step S10. In that case, once the shutter button is fully pressed, the M × N shooting operations are performed unconditionally.

In the above-described embodiment, the case where the number of focus detection areas is one has been described as an example, but focus detection is performed in a plurality of areas and the reference value of focus bracketing is obtained from the obtained plurality of focus detection results. May be determined. In addition, the change range of focus bracketing is determined according to the obtained multiple focus detection results (for example, the range of the minimum and the maximum of the multiple results is determined), the focus position changing step of focus bracketing is changed, The aperture value for exposure bracketing (fixing the aperture value so that the entire focus detection area is within the depth and changing the shutter speed to perform exposure bracketing) may be determined.

In the above-described embodiment, the description has been given by taking the bracketing photography in which the focus (the focus adjustment state of the photographic lens) and the exposure among the plurality of types of photography conditions are combined, as an example. The combination is not limited to the above embodiment. When the focal length of the zoom lens is set to one of the multiple types of shooting conditions, first change the focal length of the zoom lens, and then change other types of shooting conditions at that focal length. While taking bracketing shots, repeat the procedure to change the focal length of the zoom lens again.

In the configuration of the above embodiment, the bracketing switch 14 and the setting switch 15 are setting means, the control circuit 8, the winding mirror raising device 12 and the shutter 16 are bracketing photographing means, and the control circuit 8 is an unexposed frame. Each detecting means is configured.

[0036]

As described above, according to the present invention, the focus adjustment state, exposure, and
The number of shots that was set in advance was changed while changing multiple types of shooting conditions such as the flash emission amount, the focal length of the zoom lens, and the combination of shutter speed and aperture for the proper exposure value. The operability is improved compared to the case where the bracketing shooting is performed, and the photograph under the optimum shooting condition can be obtained without missing the photo opportunity. In addition, it is prohibited to set any two or more of the exposure conditions, the combination of the shutter speed and the aperture for the proper exposure value, and the flash emission amount at the same time as the shooting conditions, and at the same time, three or more shooting conditions are set at the same time. Since the prohibition is also prohibited, it is possible to prevent the bracketing shooting which is complicated and exceeds the maximum number of shooting frames of the film. When the focus adjustment state of the taking lens is set to one of a plurality of types of shooting conditions, the focus adjustment state of the taking lens is first changed, and then another type of shooting condition is changed in that focus adjustment state. While taking bracketing shots, the procedure to change the focus adjustment state of the taking lens was repeated. When the focal length of the zoom lens is set to one of the multiple types of shooting conditions, the focal length of the zoom lens is changed first, and then the other types of shooting conditions are changed at that focal length. However, since the bracketing shooting is performed and the procedure of changing the focal length of the zoom lens is repeated again, the number of times to drive the shooting lens or the zoom lens is reduced and the power consumption of the driving actuator can be saved. Also, since the time required to move the shooting lens or zoom lens is shortened and the time required for bracketing shooting is also shortened, the probability of subject conditions changing during shooting is reduced, and the intended shooting result may be obtained. Get higher Furthermore, in a plurality of times of photographing under other kinds of photographing conditions that require photographing at the same lens position, photographing can be performed at the completely same lens position.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing the configuration of an embodiment.

FIG. 2 is an explanatory diagram of focus bracketing according to an embodiment.

FIG. 3 is an explanatory diagram of focus bracketing according to an embodiment.

FIG. 4 is an explanatory diagram of exposure bracketing according to an embodiment.

FIG. 5 is an explanatory diagram of exposure bracketing according to an embodiment.

FIG. 6 is an explanatory diagram of exposure bracketing according to an embodiment.

FIG. 7 is an explanatory diagram of flash bracketing according to an embodiment.

FIG. 8 is an explanatory diagram of flash bracketing according to an embodiment.

FIG. 9 is an explanatory diagram of flash bracketing according to an embodiment.

FIG. 10 is an explanatory diagram of zoom bracketing according to an embodiment.

FIG. 11 is an explanatory diagram of zoom bracketing according to an embodiment.

FIG. 12 is an explanatory diagram of zoom bracketing according to an embodiment.

FIG. 13 is an explanatory diagram of program bracketing according to an embodiment.

FIG. 14 is an explanatory diagram of program bracketing according to an embodiment.

FIG. 15 is an explanatory diagram of program bracketing according to an embodiment.

FIG. 16 is a diagram showing a display example when focus bracketing is set.

FIG. 17 is a diagram showing a display example when AE bracketing is set.

FIG. 18 is a diagram showing a display example during focus bracketing shooting.

FIG. 19 is a diagram illustrating a bracketing shooting operation that is a combination of focus bracketing and exposure bracketing.

FIG. 20 is a flowchart showing a bracketing shooting control program according to an embodiment.

FIG. 21 is a flowchart showing a bracketing shooting control program of one embodiment following FIG. 20.

[Explanation of symbols]

 1 Camera Body 2 Lens 3 Photographic Optical System 4 Main Mirror 5 Sub Mirror 6 Film 7 Focus Detection Device 8 Control Circuit 9 Focus Control Device 10 Photometric Device 11 Aperture Control Device 12 Winding Mirror Up Device 13 Release Switch 14 Bracketing Switch 15 Setting Switch 16 Shutter 17 Finder 18 Display 19 Light control device 20 Flash 21 Zoom control device

Claims (11)

[Claims] 1. A setting means for setting a plurality of types of shooting conditions and a number of times of shooting, and a bracketing shooting means for shooting a set number of times while changing a plurality of types of shooting conditions set by the setting means. A camera capable of bracketing shooting. 2. The camera capable of bracketing shooting according to claim 1, wherein the plurality of types of shooting conditions include a focus adjustment state of a shooting lens, an exposure amount, a flash emission amount, a focal length of a zoom lens, and an appropriate exposure value. A camera capable of bracketing photography, which includes a combination of shutter speed and aperture. 3. The camera capable of bracketing shooting according to claim 2, wherein the setting unit is any of two kinds of exposure conditions, a combination of a shutter speed and an aperture with respect to an appropriate exposure value, and a flash emission amount. A camera capable of bracketing photography, which prohibits the above settings from being set at the same time. 4. The camera capable of bracketing shooting according to claim 2, wherein the setting unit prohibits simultaneous setting of three or more kinds of shooting conditions. 5. The camera capable of bracketing photographing according to claim 1, further comprising: an unexposed frame number detecting unit for detecting the number of unexposed frames of the film, wherein the bracketing photographing unit is A camera capable of bracketing shooting, wherein bracketing shooting is not performed when the number of times of shooting set by the setting means is larger than the number of unexposed frames detected by the unexposed frame number detection means. 6. The camera capable of bracketing photographing according to claim 1, wherein the bracketing photographing means has a plurality of photographing conditions in which the focus adjustment state of the photographing lens is set by the setting means. When set to one of the above, first change the focus adjustment state of the taking lens, then perform bracketing shooting while changing other kinds of shooting conditions in that focus adjusting state, and then again A camera capable of bracketing photography, which is characterized by repeating the procedure of changing the focus adjustment state. 7. The camera capable of bracketing photographing according to claim 1, wherein the bracketing photographing means has a zoom lens having a focal length of a plurality of kinds of photographing conditions by the setting means. Of 1
When set to two, first change the focal length of the zoom lens, then perform bracketing shooting while changing other types of shooting conditions at that focal length, and then change the focal length of the zoom lens again. A camera capable of bracketing shooting characterized by repeating steps. 8. The bracketing-capable camera according to claim 2, wherein the flash emission amount is determined based on a guide number without performing light adjustment. A camera that can shoot. 9. A bracketing photographing method, wherein photographing is performed a plurality of times while changing a plurality of kinds of photographing conditions set in advance. 10. The bracketing shooting method according to claim 9, wherein when the focus adjustment state of the shooting lens is set to one of the plurality of types of shooting conditions, the focus adjustment state of the shooting lens is first set. A bracketing shooting method, characterized in that the bracketing shooting is performed while changing other kinds of shooting conditions in the focus adjustment state, and then the procedure of changing the focus adjustment state of the taking lens is repeated again. 11. The bracketing photographing method according to claim 9, wherein when the focal length of the zoom lens is set to one of the plural kinds of photographing conditions, first, the focal length of the zoom lens is changed. Then, the bracketing shooting method is characterized in that the bracketing shooting is performed while changing other kinds of shooting conditions at the focal length, and then the procedure of changing the focal length of the zoom lens is repeated.