JPH09274212A - Bracketing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify setting operation and to improve operability by outputting a correction amount after selection, correcting a set diaphragm value according to the output and correcting a shutter speed value according to the output. SOLUTION: Signals from a bracketing switch 13 and a custom switch 14 are inputted in a CPU 17. Signal generation circuits 15 and 16 generate predetermined signals by every click with the rotation of a main command dial 3 and a sub command dial 4, respectively. According to the signal from the CPU 17, a mirror control circuit 18 controls a mirror, and a diaphragm control circuit 19, a shutter control circuit 20 and a film feeding circuit 21 control a diaphragm, a shutter and the feeding of film, respectively. Then, the bracketing of exposure and the bracketing of light control amount are independently controlled. For example, in a state where a person at a short distance and background light such as an evening scene are independently controlled, the bracketing photographing is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bracketing device such as a camera.

[0002]

2. Description of the Related Art Conventionally, a bracketing photographing device capable of changing the exposure level of an image stepwise has been widely known. This exposure level can be changed stepwise by changing the amount of exposure that is uniquely determined by the aperture value and the shutter speed (hereinafter referred to as the exposure amount), and the light emission amount of the flash device (hereinafter referred to as dimming control). There are two methods of changing the quantity and).

As a method of controlling the exposure amount and the dimming amount in a bracketing device, there is a technique disclosed up to now, for example, in Japanese Patent Application No. 2-153418. According to this conventional technique, it is possible to independently set the bracketing shooting with the change in the exposure amount and the bracketing shooting with the change in the dimming amount, so that it is possible to support various modes in the so-called daytime synchronized shooting. Has become.

On the other hand, in the so-called manual exposure mode (M mode) in which the aperture value and the shutter speed value can be manually set to arbitrary values in the bracketing photography of the exposure amount,
There is a problem of what kind of control should be performed on both, and various techniques have been proposed conventionally.

Regarding this problem, for example, Japanese Patent Application No. 61-1
No. 79849 proposes a technique of changing only the shutter speed value in order to avoid a change in the depth of field in M mode bracketing photography. Further, in Japanese Patent Application No. 59-270050, by arbitrarily setting the ratios of the aperture value and the shutter speed value that contribute to the exposure amount change in M mode bracketing photography, bracketing photography in all situations is possible. Proposals for compatible devices have been made.

[0006]

However, in the first prior art, it is necessary to prepare a display section for each of the bracketing photographing parameters of the exposure amount and the dimming amount, so that the display unit of the camera is required. There is a possibility that this will lead to an increase in design costs. Furthermore, both of them have to be set individually, which causes a problem that the setting operation takes time.

Further, the second prior art device has a problem that it cannot meet the demand for changing the exposure amount while fixing the shutter time in order to make the motion of the moving body constant. Exists.

In the third prior art device,
It is possible to arbitrarily set the ratio that contributes to the exposure amount of the aperture value and shutter speed value, but how to display it
It is unclear because there is no description as to whether it is easy for the user to understand.

Further, in the cameras already commercialized, the shutter speed value and the aperture value are set by the user in the M mode, and therefore it is considered that they should not be changed by the bracketing. Some are designed based on it. Based on this idea, it is obvious that the second and third conventional techniques have problems.

The present invention has been made in view of the above-mentioned problems, and the setting operation is simple, the display section is not complicated, and most of the exposure amounts and the dimming amounts are involved in the bracketing photography. The purpose is to enable photographic expression.

[0011]

To achieve this object, a bracketing device of the present invention comprises an aperture setting circuit (19) for setting an aperture value and a shutter time setting circuit for setting a shutter time value. (20), a number setting circuit (4) capable of setting a predetermined number of shots, an exposure level correction amount setting circuit (4) setting an exposure level correction amount, and a setting value of the exposure level correction amount setting circuit. An exposure level correction circuit (17) that gradually changes and outputs the exposure level correction amount based on a predetermined number of sheets based on the output, and an aperture value and a shutter speed to realize the exposure level correction by the output of the exposure level correction circuit. One of a plurality of combinations in which the composition of the respective correction amounts of the two variable elements of the value is changed can be selected, and each of the selected correction amounts can be output.
7), the aperture value set by the aperture setting circuit is corrected according to the output of the correction selection circuit, and the shutter time value set by the shutter time value setting circuit is corrected according to the output of the correction selection circuit. Exposure control circuit (1
7) and are provided.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a top view showing an embodiment of the bracketing device according to the present invention.

In FIG. 1, a release button 1 is pressed to start the exposure operation of the camera. Top view 2
Is arranged on the upper surface of the camera and can be visually recognized from the outside.
Is prepared. The main command dial 3 is an operation member that is exposed on the back side of the camera and can be rotated in both directions from the outside.
A predetermined signal is output each time a click operation is performed. The sub-command dial 4 is an operation member that is exposed on the front side of the grip of the camera and can be rotated in both directions from the outside. It generates a click at each predetermined rotation angle, and outputs a predetermined signal each time one-click operation is performed. To do. The details of the main command dial 3 and the sub command dial 4 are publicly known and will not be described.

FIG. 2 is a rear view of the camera showing the embodiment of the present invention. The rear display 5 is arranged on the rear surface of the camera and can be visually recognized from the outside. In the rear display 5, there are a bracketing mark 5a that can be turned on and off, a custom mark 5b, and a display unit 5c composed of a 4-digit 7-segment element. It is prepared. The custom button 6 is an operation button that can be pressed from the outside, and a switch described later is turned on only while it is pressed, and when released, the custom button 6 returns to turn off the switch. Similarly, the bracketing button 7 is an operation button that can be pressed from the outside, and turns on a switch described later only while it is pressed, and returns when it is released to turn off the switch.

FIG. 3 is a block diagram showing the circuit configuration of the embodiment of the present invention. The operation of the circuit is entirely powered by the battery 11. The control in the camera is executed mainly by the CPU 17. A signal from the release switch 12 is input to the CPU 17. Release switch 12
Is a switch that is turned on by pressing the release button 1 in FIG. Similarly, signals from the bracketing switch 13 and the custom switch 14 are also input to the CPU 17. The bracketing switch 13 and the custom switch 14 are switches that are turned on by pressing the bracketing button 7 and the custom button 6 shown in FIGS. 1 and 2, respectively.

The signal generation circuit 15 generates a predetermined signal for each click by the rotation of the main command dial 3 and the signal generation circuit 16 by the rotation of the sub command dial 4. According to the signal output from the CPU 17, the mirror control circuit 18 controls the mirror, the diaphragm control circuit 19 controls the diaphragm, the shutter control circuit 20 controls the front and rear curtains of the shutter, and the film feeding circuit 21 controls the film feeding. Control each sending. The charge circuit 22 also performs mirror down, aperture reset, and shutter charge. Further, the display contents of the liquid crystal display 24 and the liquid crystal display 25 corresponding to the upper surface display 2 and the rear surface display 5 shown in FIGS. 1 and 2 are controlled via the liquid crystal driver 23.

FIG. 4 is a flow chart showing a control routine of the CPU 17 relating to the bracketing mode setting method. This routine is repeatedly executed while power is being supplied to the CPU 17. The operation will be described below.

In step S1, it is determined whether or not the bracketing switch 13 is in the state, that is, whether or not the bracketing button 7 in FIG. 1 is pressed. If it has been pressed, the operation proceeds to step S2, and if it has not been pressed, the operation proceeds to step S2.
Branch to 18. In step S18, the state of the bracketing flag is determined. If it is 1, the process proceeds to step S19, and if it is 0, the process branches to step S20. In step S19, the currently set state is displayed on the bracketing setting display section 5c in the rear display 5. In step S20, the displays 2a, 5a, and 5c related to bracketing in the top display 2 and the back display 5 are all turned off.

In step S2, the currently set state is displayed on the 4-digit 7-segment display portion 5c of the rear display 5. Specifically, the display will be described later in the description of FIG. A step S3 decides the state of the signal generating circuit 15, that is, whether or not the main command dial 3 in FIG. 1 is turned. If the signal is output by rotating the signal by one click in either direction, the process proceeds to step S4. If there is no signal output, the process branches to step S7.

In step S4, the state of the bracketing flag is switched. Specifically, 1 if the flag is 0
If it is 1, set it to 0. In step S5, the state of the bracketing flag is determined. If 1, then step S6
If it is 0, the process branches to step S17. In step S17, the BKT marks 2a and 5a in the top display 2 and the back display 5 (FIGS. 1 and 2) are turned off.

The bracketing flag is a flag which is 1 when the bracketing mode is set and which is 0 when the bracketing mode is not set. In step S6,
B in top display 2 and back display 5 (FIGS. 1 and 2)
The KT marks 2a and 5a are turned on.

In step S7, it is determined whether the sub-command dial 4 of FIG. 1 has been turned counterclockwise. If no signal is output, the process branches to step S12 (described later), and if the signal is output counterclockwise by one click, the process proceeds to step S8. In step S8, 1 is added to the number of the state pattern of each bracketing data. As will be described later with reference to FIG. 5, there are five types of bracketing data state patterns with different combinations of the exposure shift amount and the number of shots. One of these can be selected. ing. A bracketing number (BKT No.) is assigned to each pattern, and 1 is added to this number.

In step S9, the bracketing number B
KT No. Is determined to be 5 or more. If it exceeds 5, the process proceeds to step S10, and if not, the process branches to step S11. In step S10, BKT
No. Is set to 1. In step S11, the BKT mark 2 in the top display 2 and the back display 5 (FIGS. 1 and 2) is displayed.
Turn off a and 5a.

In step S12, it is determined whether the subcommand dial 4 in FIG. 1 has been turned clockwise. When there is no signal output, this routine is ended, and when the signal is output by one clockwise rotation, the process proceeds to step S13. In step S13, the bracketing number BKT No. Subtract 1 from. Step S1
4, the bracketing number BKT No. 4 is used. Is less than 1 is determined. If it is less than 1, the process proceeds to step S15, and if not, the process branches to step S16. In step S15, BKT No. Is set to 5. In step S16, the display of the bracketing setting display section 5c in the rear display 5 is updated to the newly set state.

FIG. 5 is a front view showing an example of the display form of each data relating to the bracketing of the rear display 5.

FIG. 5A shows a bracketing number BKT.
No. Is a display when is 1. In this state, set the adjacent exposure shift amount for bracketing shooting to 1 /
3 steps and 3 shots. The number of images to be photographed is displayed in the first digit of the display unit 5c and the exposure shift amount is displayed in the third to fourth digits so that the state of each of these data can be visually recognized. When the bracketing shooting is actually started, if the custom set state described later is the default state, the exposure value and the flash unit light emission amount are 1/3 step under for the first image and the shift amount is 0, 3 for the second image. It means that the eyes control automatically so that it is over 1/3 step.

FIG. 5B shows a bracketing number BKT.
No. Is a display when 2. In this state, set the adjacent exposure shift amount for bracketing shooting to 1 /
The number of shots is 2 and the number of shots is 3. FIG. 5C shows a bracketing number BKT No. Is a display when 3. In this state, the adjacent exposure shift amount in the bracketing shooting is 1 step, and the number of shots is 3. FIG. 5 (d)
Is a bracketing number BKT No. Is a display when 4. In this state, the adjacent exposure shift amount in bracketing shooting is set to 1/3 step and the number of shots is set to 5. FIG. 5E shows the bracketing number BKT No.
Is a display when 5. In this state, the adjacent exposure shift amount of the bracketing shooting is 1/2 step and the number of shots is 5.

Next, the actual setting of the bracketing mode in FIGS. 4 and 5 and the specific operation for setting each numerical value will be described.

When the bracketing mode is not set yet, that is, when the bracketing flag is 0, unless the bracketing button 7 is pressed, steps S1 and S18 of the bracketing setting routine,
Since the process goes through step S20, no display related to bracketing is made on the rear liquid crystal displays 2 and 5.

When the bracketing button 7 is pressed, the process proceeds from step S1 to step S2, and the display 5c for each bracketing data is turned on. The state of each bracketing data is the bracketing number BKT No. Is uniquely determined by Assuming that this value is 1, the state of FIG. 5A is selected, and it is displayed that the exposure shift amount is 1/3 and the number of shots is 3.

When the main command dial 3 is rotated one click in either direction, the process proceeds from step S3 to step S4, and the bracketing flag is switched from 0 to 1. Therefore, steps S5 to S6
Since the bracketing marks 2a and 5a are turned on, the photographer can recognize that the bracketing mode is set.

When the sub-command dial 4 is further rotated counterclockwise by one click while the bracketing button 7 is being pressed, the process proceeds from step S7 to step S8 and the bracketing number BKT No. 1 is added to 2 and becomes 2. Therefore, as can be seen from FIG. 5, the state of each bracketing data is an exposure shift amount of 1/2 step and the number of shots is 3.

Then, via step S9, step S
After branching to 11 and updating the status display 5c of each data (this results in the display of FIG. 5B), step S12
Proceed to. However, since the sub-command dial 4 is not rotated clockwise at this point, step S1
After passing 1, the routine is finished.

As can be seen from the above, it is possible to set and cancel the setting of the bracketing mode by rotating the main command dial 3 while pressing the bracketing button 7. By rotating the command dial 4, it is possible to correct the state of each bracketing data.

As can be easily understood from the routine shown in FIG. 4, when the sub-command dial 4 is rotated clockwise while pressing the bracketing button 7, the selection direction of each bracketing data state is switched to the opposite direction. You can also go. Further, steps S9 and S10 are steps for permitting the transition from the state of FIG. 5E to the state of FIG. 5A when the subcommand dial 4 is endlessly rotated counterclockwise. Similarly, steps S14 and S15 are steps for allowing the transition from the state of FIG. 5A to the state of FIG. 5E when the sub command dial 4 is endlessly rotated counterclockwise.

The operation of selecting the state of each data after setting the bracketing mode from the state where the bracketing mode is not set as the initial state has been described above. However, in this routine, the mode should be set first. Even if not, the state of each data is selected by rotating the sub command dial 4 while pressing the bracketing button 7, and then the mode is changed by rotating the main command dial 3 while pressing the bracketing button 7. You can also make settings. When only the state of each data is selected without setting the bracketing mode, steps S18 and S20 are performed when the pressing of the bracketing button 7 is released.
Passing through, turn off all bracketing displays.

FIG. 6 is a flow chart showing the control routine of the CPU 17 relating to the setting method of the custom set mode. This routine is also repeatedly executed while power is being supplied to the CPU 17. The operation will be described below.

In step S31, the custom switch 1
4 state, that is, whether or not the custom button 6 in FIG. 1 is pressed. If pressed, step S
If the button is not pressed, the process branches to step S47. In step S47, the state of the custom set flag is determined. If any one of the custom set flags of menus 1 and 2 (described later in FIGS. 7 and 8) is 1, the process proceeds to step S48, and if both are 0, the process branches to step S49. In step S48, the custom mark 5b in the rear display 5 is turned on. In step S49, the display regarding the custom set in the rear display 5 is turned off, and the display before the custom button 6 is pressed is restored.

In step S32, the custom mark 5b on the rear display 5 is turned on. In step S33, it is determined whether or not a custom menu display, which will be described later with reference to FIGS. 7 and 8, is displayed on the display unit 5c of the rear display 5. If the custom menu is not displayed, the process proceeds to step S34, and if not, the process branches to step S36. In step S34, it is determined whether or not the display of the custom set contents, which will be described later with reference to FIGS. 9 and 10, is displayed on the 4-digit 7-segment display portion 5c of the rear surface display 5. If the custom set contents are not displayed, the process proceeds to step S35, and if not, the process branches to step S36. In step S35, the display unit 5c is switched to the display state of the custom menu display. A step S36 decides the state of the signal generating circuit 15, that is, whether or not the main command dial 3 in FIG. 1 is turned. When the signal is output by one click in either direction, the process proceeds to step S37, and when there is no signal output, the process branches to step S40.

In step S37, it is determined whether or not the custom menu display is displayed on the 4-digit 7-segment display portion 5c in the rear display 5. If the custom menu is displayed, the process proceeds to step S38, and if not, the process branches to step S39. In step S38, the custom menu is switched. As will be described later, in the custom menu, the exposure amount bracketing that is uniquely determined by the shutter speed and the aperture value (exposure amount bracketing) and the flash device emission amount bracketing (light adjustment amount bracketing) are available. A menu 1 that allows selection of a combination pattern and a menu 2 that allows selection of a pattern of a shutter speed value and a combination ratio of aperture values in bracketing in the manual exposure mode are prepared. In step S38, this menu is switched.

In step S39, the number of the currently selected menu and the state of the custom flag of that menu are displayed on the display section 5c in the rear display 5 of FIG. Details of the display form will be described later with reference to FIGS. 9 and 10. Step S
At 40, it is determined whether or not the subcommand dial 4 of FIG. 1 has been turned counterclockwise. When there is no signal output, the process branches to step S43, and when the signal is output by one counterclockwise rotation, the process proceeds to step S41. In step S41, it is determined whether the custom set content display is displayed on the display unit 5c. If the contents of the custom set are displayed, proceed to step S42,
If not, the process branches to step S46. In step S42, the pattern next to the currently selected pattern is newly selected from among several kinds of predetermined patterns prepared in order in each menu. If the currently selected pattern is the last pattern and there is no next pattern, the first pattern is restored. The contents of the pattern will be described later.

In step S43, it is determined whether or not the subcommand dial 4 in FIG. 1 has been turned clockwise. When there is no signal output, this routine is ended, and when the signal is output by one clockwise rotation, the process proceeds to step S44. In step S44, it is determined whether the custom set content display is displayed on the display unit 5c. If the custom set contents are displayed, step S
If not, the process branches to step S46. In step S45, a pattern before the currently selected pattern is newly selected from among several kinds of predetermined patterns prepared in order in each menu. If the currently selected pattern is the first pattern and there is no previous pattern, the last pattern is restored. Step S
At 46, the content of the currently selected pattern is displayed in a predetermined form.

7 and 8 are front views showing an example of the display form of the custom menu of the rear liquid crystal display 5 and its flag state. The meaning of the flag is a default state when the flags (M1, M2 flags) of the custom menus 1 and 2 are 0, and a state other than the default when 1 is set. In the custom menu display state, the menu number is displayed in the second digit of the display unit 5c, and the flag state of each menu is displayed in the fourth digit. FIG. 7A shows a state in which the flag is not set in the menu 1, and FIG. 7B shows a state in which the flag is not set in the menu 2. Also,
In FIG. 8A, the menu 1 is not flagged as in FIG. 7A, but in FIG. 8B, the menu 1 is flagged.

9 and 10 are front views showing an example of a display form relating to the contents of the custom set of the rear liquid crystal display 5. FIG. 9 is a content display when the custom menu 1 is selected. In the custom set content display state, the content of the dimming amount BKT flag (SB flag) indicating whether or not to perform the dimming amount bracketing on the second digit of the display unit 5c, and whether the exposure amount bracketing is performed on the third digit. The content of the exposure amount BKT flag (AE flag) indicating whether or not the letter E is displayed as the exposure amount symbol in the fourth digit.

Therefore, in FIG. 9A, both the dimming amount and the exposure amount bracketing are performed, and in FIG. 9B, the dimming amount is constant and only the exposure amount bracketing is performed, and FIG. 9C.
Shows that the exposure amount is constant and only the dimming amount bracketing is performed. AE in this custom menu 1
And the state of the SB flag and the M1 flag are AE and S
If the B flag is (1, 1), it is in the default state, so the M1 flag is 0, and if it is (0, 1), 1
And the relation is such that in the case of (1, 0), it becomes 1.

FIG. 10 shows the contents displayed when the custom menu 2 is selected. In the custom set content display state, in the bracketing in the manual exposure mode in the second digit of the display unit 5c, the shutter speed BKT flag (T flag) indicating whether to apply the shutter speed value to the exposure amount shift is set. The content of the aperture value BKT flag (A flag) indicating whether or not the aperture value is applied to the third digit, and the letter A is displayed as the aperture symbol at the fourth digit.

Therefore, in FIG. 10A, both shutter speed and aperture value are applied to the exposure amount shift, and FIG.
Only the aperture value is applied, only the shutter speed is applied in FIG. 10C, and neither is applied in FIG. 10D. Regarding the state of the T and A flags and the M2 flag in this custom menu 2, the T and A flags are (1,
In the case of 1), the M1 flag is 1, and in the case of (0, 1), it is 0 because it is the default state, and (1, 0)
In the case of, the relationship is 1, and in the case of (0, 0), the relationship is 1. It should be noted that there is no state in which the dimming amount bracketing is not performed in any selected state of the menu 2.

Next, the actual setting and releasing method of the custom set and the operation for setting each numerical value in FIGS. 6 to 10 will be described. The set status and flag status related to the custom set are all default (initial).
It is assumed to be in the state.

When the custom button 6 is not pressed and neither the custom menu 1 nor the custom menu 2 is flagged, the process branches from step S31 to step S47 in the flowchart (FIG. 6) and only step S49 is executed. , No indications about custom sets are made.

If the custom button 6 is not pressed but the flag is set in any of the custom menus 1 and 2, the process branches from step S31 to step S47 to execute steps S48 and S49. By turning on the display portion 5b of the rear display 5, it is possible to inform the photographer that one or both of the custom menus 1 and 2 is in the custom set state, that is, not in the default state.

When the custom button 6 is pressed, the custom mark 5b is first turned on in step S32. In step S33, it is determined whether or not the custom menu is displayed. However, since the custom menu is always displayed immediately after pressing the custom button 6, the process branches to step S36. If none of the main and sub command dials 3 and 4 is operated while the custom button 6 is being pressed, the routine is terminated via the steps S36, S40, and S43.

When the main command dial 3 is rotated one click in any direction while pressing the custom button 6, the process proceeds from step S36 to step S37. Here, it is determined whether or not the display portion 5c of the rear display 5 is in the custom menu display state. At this time, since it is still in the non-display (or display irrelevant to the custom set) state, the process branches to step S39 and the custom Display the menu number and flag. When the main command dial 3 is rotated again by one click while the custom button 6 is being pressed, steps S37 to S38 are executed to switch the custom menu (menu 1 to 2 and 2 to 1). .

When the sub-command dial 4 is rotated counterclockwise by one click while the custom button 6 is pressed, the process proceeds from step S40 to step S41. In step S41, it is determined whether or not the display unit 5c is in the content display state, but since the content display state is not yet present at the beginning, step S4
The content is displayed by branching to 46. A specific display form is as shown in FIG.

After the contents are displayed by the custom button 6 and the sub-command dial 4, the sub-command dial 4 is rotated again by one click counterclockwise while the pressed state of the custom button 6 is kept. Then, from step S41. In step S42, the content is switched from the currently selected pattern to the next pattern. Specifically, FIG. 9 (a)
If the pattern is selected, the pattern is switched to the pattern shown in FIG. 9B by operating the custom button 6 and the sub command dial 4. When the custom button 6 is pressed and the sub-command dial 4 is rotated by one click in the clockwise direction, the same operation is performed except that the content is switched to the previous pattern.

In these pattern selecting operations, if the pattern is selected by rotating the sub-command dial 4 in one direction, the operability is good, so that the first pattern after the final pattern is before the first pattern. Is configured so that the final pattern is selected. For example,
In the custom menu 1, while the custom button 6 is being pressed after the selection of FIG.
When is rotated counterclockwise by one click, FIG. 9A is selected.

Since the display form changes as shown in FIGS. 9 and 10 with the selection of each pattern, the user can confirm which pattern is currently selected each time. Also, as described above, M1 or M depends on whether or not the content pattern of each custom menu is in the default state.
Since the two flags are switched, it is possible to confirm whether or not it is the default state by looking at the display state of the custom menu (FIG. 8) without operating the sub-command dial 4.

In summary, the main command dial operation while pressing the custom button 6 switches the custom menu to call the desired menu, and the sub command dial 4 operation while pressing the custom button 6
You can recall the desired pattern in the menu.

FIG. 11 is a flow chart showing a control routine of the CPU 1 relating to the release sequence at the time of actual photographing. This routine is also repeatedly executed while power is being supplied to the CPU 17. The operation will be described below.

In step S51, the release switch 1
The state of 2, that is, whether or not the release button 1 in FIG. 1 is pressed is determined. If so, the process proceeds to step S52, and if not, the present routine ends. In step S52, it is determined whether or not the bracketing mode is set, that is, whether or not the bracketing flag is 1. If it is set, the process proceeds to step S53, and if not, the process branches to step S56.

In step S53, each set value related to bracketing is read. Specifically, the exposure shift amount ST, the bracketing shooting number N0, the custom menu flag state, and the flag state in each menu are read. In step S54, the number N0 of bracketing shots is set in the counter N. In step S55,
The calculation processing of the exposure amount and the dimming amount related to the bracketing shooting is executed. This step will be described in detail in the description of FIG.

In step S56, the mirror control circuit 18 shown in FIG. 3 is controlled to control mirror up.
In step S57, the aperture control circuit 19 shown in FIG. 3 is controlled to control the aperture value. In step S58,
The shutter control circuit 20 of FIG. 3 is controlled to drive the shutter front curtain. Similarly, in step S59, as shown in FIG.
The shutter control circuit 20 is controlled to drive the rear curtain of the shutter to complete the exposure at the predetermined shutter time value. In step S60, the charge circuit 22 of FIG. 3 is controlled to reset the mirror down and diaphragm.

In step S61, the charge circuit 22 shown in FIG. 3 is controlled to charge the shutter. In step S62, the film feeding circuit 22 of FIG.
To feed the film. Step S6
In 3, it is determined whether or not the bracketing mode is set, that is, whether or not the bracketing flag is 1. If it is in the setting state, the process proceeds to step S64. In step S64,
Subtract 1 from the counter N. In step S65, it is determined whether the counter N has reached 0. When it becomes 0, this routine is ended, and when it does not become 0, the process branches to step S55.

FIG. 12 is a calculation processing routine of the exposure amount and the dimming amount in the bracketing photography in the M mode, which corresponds to the release sequence routine (step S55) of FIG.

In step S71, it is determined whether or not the dimming amount bracketing flag (SB flag) is 1.
If 1, go to step S71, if 0, step S7
Branch to 2. In step S72, the light adjustment shift amount dSB for the next shooting is calculated from the counter N and the exposure shift amount ST. As an example, when the exposure shift amount is 1/3 and the number of bracketing shots is 5, N = 5 is set for the first bracketing shot, so the exposure shift amount dS
B becomes -2/3 stage. In step S73, it is determined whether the exposure amount bracketing flag (AE flag) is 1. If it is 1, the process proceeds to step S74, and if it is 0, this routine is ended. In step S74, it is determined whether or not the shutter speed bracketing flag (T flag) is 1. If it is 1, the process proceeds to step S75, and if it is 0, the process branches to step S78.

In step S75, it is determined whether the aperture value bracketing flag (A flag) is 1. 1
In case of, it progresses to step S76, and in case of 0, it branches to step S80. In step S76, the counter N
And the shutter speed shift amount dTv at the time of the next photographing is calculated from the exposure shift amount ST. As an example, if an exposure shift amount of 1/3 and a bracketing shooting number of 5 are set, the first bracketing shooting is N = 5, and thus the exposure shift amount dTv is -1/3. . Step S77
Then, the aperture value shift amount dAv for the next shooting is calculated from the counter N and the exposure shift amount ST. As an example, if an exposure shift amount of 1/3 and a bracketing shooting number of 5 are set, the first bracketing shooting is N = 5, and the exposure shift amount dAv is -1/3. .

In step S78, it is determined whether the aperture value bracketing flag (A flag) is 1. 1
In the case of, it progresses to step S79, and in the case of 0, this routine is complete | finished. In step S79, the aperture value shift amount dA for the next shooting is calculated from the counter N and the exposure shift amount ST.
Calculate v. As an example, the exposure shift amount is 1/3 steps,
If 5 bracketing shots are set, the exposure shift amount dAv is -2/3 steps because N = 5 in the first bracketing shot.

In step S80, the shutter speed shift amount d for the next photographing is calculated from the counter N and the exposure shift amount ST.
Calculate Tv. As an example, the exposure shift amount is 1/3
If the number of shots for bracketing shooting is set to 5,
Since N = 5 in the first bracketing shooting, the exposure shift amount dTv is -2/3 stage.

Next, how the exposure control in actual bracketing photography is executed will be described with reference to FIGS. 11 and 12. (1) AE, SB flag = (1, 1), A, T flag =
In case of (1, 1)

In this setting, since both the AE and SB flags are 1, steps S55 in FIG. 11, that is, steps S72 and S7 in the subroutine in FIG.
6 and the processing of S77 are executed. Therefore, the shutter speed value and the aperture value are simultaneously changed by dTv and dAv for exposure amount bracketing, but the exposure amount change is equal to the set exposure shift amount.
Both are set to 1/2 of the set exposure shift amount. At the same time, the dimming amount is also changed so that dSB becomes the set exposure shift amount.

As an example, the situation of the bracketing shooting when the exposure shift amount is 1/3 and the number of bracketing shooting is 3 is shown. With this setting, the following bracketing shooting is executed. First sheet ... dTv = -1 / 6 stage, dAv = -1 / 6
Stage, dSB = -1 / 3 stage Second sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
3rd stage ... dTv = 1/6 stage, dAv = 1/6 stage, d
SB = 1/3 stage

By making such a setting, it becomes possible to carry out bracketing photography in which all the shutter speed value, aperture value and dimming amount are changed. (2) AE, SB flag = (1, 1), A, T flag =
In case of (0, 1)

In this setting, both the AE and SB flags are 1, but since the A flag is 0, the processes of steps S72 and S80 are executed in step S55 of FIG. 11, that is, in the subroutine of FIG. Therefore, only the shutter speed value is dT for exposure bracketing.
v so that the exposure amount change is equal to the set exposure shift amount. At the same time, the dimming amount is also changed so that dSB becomes the set exposure shift amount.

As an example, the situation of the bracketing shooting when the exposure shift amount is 1/3 and the number of bracketing shootings is 3 is shown. With this setting, the following bracketing shooting is executed. 1st sheet ... dTv = -1 / 3 step, dAv = 0 step, dS
B = -1 / 3 stage 2nd sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
3rd stage: dTv = 1/3 stage, dAv = 0 stage, dSB
= 1/3 stage

By carrying out such a setting, it becomes possible to carry out bracketing photography in which the exposure amount and the dimming amount are changed while the aperture value is fixed. (3) AE, SB flag = (1, 1), A, T flag =
In the case of (1, 0)

In this setting, both the AE and SB flags are 1, but the T flag is 0. Therefore, in the step S55 of FIG. 11, that is, in the subroutine of FIG. 12, the steps S72 and S79 are executed. Therefore, only the aperture value is changed by dAv for exposure amount bracketing so that the change in exposure amount becomes equal to the set exposure shift amount. At the same time, the dimming amount is also changed so that dSB becomes the set exposure shift amount.

As an example, the situation of the bracketing shooting when the exposure shift amount is 1/3 and the number of bracketing shootings is 3 will be shown. With this setting, the following bracketing shooting is executed. 1st sheet ... dTv = 0 step, dAv = -1 / 3 step, dS
B = -1 / 3 stage 2nd sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
3rd stage: dTv = 0 stage, dAv = 1/3 stage, dSB
= 1/3 stage

By making such a setting, it is possible to carry out bracketing photography in which the exposure amount and the dimming amount are changed while the shutter time value is fixed. (4) AE, SB flag = (1, 1), A, T flag =
In case of (0, 0)

In this setting, both AE and SB flags are 1, but both A and T flags are 0, so
In step S55 of FIG. 11, that is, the subroutine of FIG. 12, only the process of step S72 is executed. Therefore, the exposure amount bracketing is not performed, and only the dimming amount is dSB.
Is changed so as to be the set exposure shift amount.

As an example, the situation of the bracketing shooting when the exposure shift amount is 1/3 and the number of bracketing shooting is 3 is shown. With this setting, the following bracketing shooting is executed. 1st sheet ... dTv = 0 step, dAv = 0 step, dSB =-
1/3 stage 2nd sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
3rd stage ... dTv = 0 stage, dAv = 0 stage, dSB = 1
/ 3 steps

By making such a setting, it is possible to carry out bracketing photography in which only the light control amount is changed while the aperture value and the shutter speed value are both fixed. (5) AE, SB flag = (1, 0), A, T flag =
In case of (1, 1)

In this setting, the AE flag is 1, but the SB flag is 0, so that the dimming amount bracketing is not executed. Further, since both the A and T flags are 1, the processes of steps S76 and S77 are executed in step S55 of FIG. 11, that is, in the subroutine of FIG. Therefore, the shutter speed value and the aperture value are simultaneously changed by dTv and dAv for exposure amount bracketing, but both are set so that the exposure amount change is equal to the set exposure shift amount. 1 / the amount
Let it be 2. However, the dimming amount is fixed to 0 regardless of the exposure shift amount.

As an example, the situation of the bracketing shooting when the exposure shift amount is ⅓ and the number of bracketing shooting is 3 is shown. With this setting, the following bracketing shooting is executed. First sheet ... dTv = -1 / 6 stage, dAv = -1 / 6
Stage, dSB = 0 stage Second sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
3rd stage ... dTv = 1/6 stage, dAv = 1/6 stage, d
SB = 0 stage

By making such a setting, it becomes possible to carry out bracketing photography in which the shutter speed value, the aperture value, and the dimming amount are all changed. (6) AE and SB flags =
(1, 0), A, T flag = (0, 1)

In this setting, the AE flag is 1, but the SB flag is 0, so that the dimming amount bracketing is not executed. Further, although the T flag is 1, but the A flag is 0, only the process of step S80 is executed in step S55 of FIG. 11, that is, in the subroutine of FIG. Therefore, only the shutter speed value is changed by dTv for exposure amount bracketing so that the change in exposure amount becomes equal to the set exposure shift amount. However, the dimming amount is fixed to 0 regardless of the exposure shift amount.

As an example, the situation of bracketing shooting in the case where the exposure shift amount is 1/3 steps and the number of bracketing shooting is 3 is shown. With this setting, the following bracketing shooting is executed. 1st sheet ... dTv = -1 / 3 step, dAv = 0 step, dS
B = 0 stage 2nd sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
3rd stage: dTv = 1/3 stage, dAv = 0 stage, dSB
= 0

By making such a setting, it is possible to carry out bracketing photography in which only the exposure amount is changed while the aperture value is fixed. (7) AE, SB flag = (1, 0), A, T flag =
In the case of (1, 0)

In this setting, the AE flag is 1, but the SB flag is 0, so that the dimming amount bracketing is not executed. Further, although the A flag is 1, but the T flag is 0, only the process of step S79 is executed in step S55 of FIG. 11, that is, in the subroutine of FIG. Therefore, only the aperture value is changed by dAv for exposure amount bracketing so that the change in exposure amount becomes equal to the set exposure shift amount. However, the dimming amount is fixed to 0 regardless of the exposure shift amount.

As an example, the situation of bracketing shooting in the case where the exposure shift amount is ⅓ step and the number of bracketing shooting is 3 is shown. With this setting, the following bracketing shooting is executed. 1st sheet ... dTv = 0 step, dAv = -1 / 3 step, dS
B = 0 stage 2nd sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
3rd stage: dTv = 0 stage, dAv = 1/3 stage, dSB
= 0

By making such a setting, it is possible to carry out bracketing photography in which only the exposure amount is changed while the shutter time value is fixed. (8) AE, SB flag = (1, 0), A, T flag =
In case of (0, 0)

In this setting, the AE flag is 1, but the SB flag is 0, so that the dimming amount bracketing is not executed. Also, since both the A and T flags are 0,
In step S55 of FIG. 11, that is, the subroutine of FIG. 12, the exposure calculation process is not executed. Therefore, neither exposure amount bracketing nor dimming amount bracketing is executed, and only the number of shots is effective.

As an example, the situation of bracketing shooting in the case where the exposure shift amount is 1/3 and the number of bracketing shooting is 3 is shown. With this setting, the following shooting is performed. First sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
Second stage: dTv = 0 stage, dAv = 0 stage, dSB = 0
Stage 3rd sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
Step

Although such setting is seemingly meaningless, the setting of shooting with the same exposure for a predetermined number of images is used when it is difficult to grasp the shutter timing for a dynamic subject, for example. It is valid. (9) AE, SB flag = (0, 1), A, T flag =
In case of (1, 1)

In this setting, both the A and T flags are 1, but the AE flag is 0, so in step S55 of FIG. 11, that is, in the subroutine of FIG.
Only the process of step S72 is executed. Therefore, the exposure amount bracketing is not performed, and only the dimming amount is changed so that the dSB becomes the set exposure shift amount.

As an example, the situation of the bracketing shooting when the exposure shift amount is 1/3 and the number of bracketing shooting is 3 is shown. With this setting, the following bracketing shooting is executed. 1st sheet ... dTv = 0 step, dAv = 0 step, dSB =-
1/3 stage 2nd sheet ... dTv = 0 stage, dAv = 0 stage, dSB = 0
3rd stage ... dTv = 0 stage, dAv = 0 stage, dSB = 1
/ 3 steps

By carrying out such a setting, it becomes possible to carry out the bracketing photographing in which only the light control amount is changed while the aperture value and the shutter speed value are both fixed. (10) AE, SB flag = (0, 1), A, T flag =
In the case of (0, 1) (11) AE, SB flag = (0, 1), A, T flag =
In the case of (1, 0) (12) AE, SB flag = (0, 1), A, T flag =
In case of (0, 0)

Even in these settings, the AE flag is 0.
Therefore, the control is the same as in the case of (9) regardless of the A and T flags, and it is possible to perform the bracketing shooting in which only the light control amount is changed while the aperture value and the shutter speed value are both fixed.

In these bracketing photography,
The CPU 17 drives the liquid crystal driver 23 so that dTv is 0.
If not, the shutter time display unit 2b in the top display 2
The blinking shutter speed value corrected by dTv with respect to the set value is displayed, and when dAv is not 0, the aperture value display section 2c in the top display 2 flashes the aperture value corrected with dAv with respect to the set value. .

As described above, according to the apparatus of the present invention, it is possible to independently control the bracketing of the exposure amount and the bracketing of the dimming amount in the bracketing photographing. In the above, since it is possible to independently control the light of the main subject such as a person at a short distance and the background light of the evening scene etc., for example, if you want to bracket the background light while keeping the exposure level of the main subject constant, It is possible to change the balance between the two and the like in various ways to perform shooting.

Further, in exposure amount bracketing in the M mode, the combination of the aperture value and the shutter speed value can be easily changed. Therefore, for example, for a dynamic subject, the exposure level can be kept constant while keeping the dynamic feeling. It is also possible to change the exposure level while changing the dynamic feeling.

Similarly, for a deep object, it is possible to change the exposure level while keeping the depth of field constant, or to change both the depth of field and the exposure level little by little.

As an extension of bracketing photography, continuous photography with constant exposure with a limited number of shots is also possible.
It can also be used for shooting in which the shutter timing is gradually shifted without changing the exposure amount and the dimming amount at all. This form of shooting is effective in preventing unnecessary film consumption in high-speed continuous shooting.

Further, in the apparatus of the present invention, these various settings can be carried out by substantially one display element, so that the cost increase due to the addition of functions can be suppressed.

[0104]

As described above, according to the bracketing device of the present invention, among the plurality of combinations in which the combination of the respective correction amounts of the two kinds of variable elements of the aperture value and the shutter speed is changed. Correction correction circuit (17) capable of outputting one of the correction amounts after selection, and the correction selection circuit that corrects the aperture value set by the aperture setting circuit according to the output of the correction selection circuit. The exposure control circuit (17) that corrects the shutter time value set by the shutter time value setting circuit according to the output of the control circuit and controls the shutter time value is provided, so the setting operation is very simple. Therefore, the operability is good, and most of the photographic expressions related to the bracketing shooting of the exposure amount and the dimming amount are performed even though the display device does not become complicated and the cost does not increase. Possible can be made.

[Brief description of drawings]

FIG. 1 is a top view showing an embodiment of a bracketing device according to the present invention.

FIG. 2 is a rear view showing an embodiment of the bracketing device according to the present invention.

FIG. 3 is a block connection diagram showing an embodiment of a bracketing device according to the present invention.

FIG. 4 is a flowchart showing an embodiment of a bracketing device according to the present invention.

FIG. 5 is a front view showing an embodiment of the bracketing device according to the present invention.

FIG. 6 is a flowchart showing an embodiment of a bracketing device according to the present invention.

FIG. 7 is a front view showing an embodiment of a bracketing device according to the present invention.

FIG. 8 is a front view showing an embodiment of the bracketing device according to the present invention.

FIG. 9 is a front view showing an embodiment of the bracketing device according to the present invention.

FIG. 10 is a front view showing an embodiment of the bracketing device according to the present invention.

FIG. 11 is a flowchart showing an embodiment of a bracketing device according to the present invention.

FIG. 12 is a flowchart showing an embodiment of a bracketing device according to the present invention.

[Explanation of symbols]

 1 Release Button 2a Bracketing Mark 2b Shutter Time Display 2c Aperture Value Display 3 Main Command Dial 4 Sub Command Dial 5a Bracketing Mark 5b Custom Mark 6 Custom Button 7 Bracketing Button 12 Release Switch 13 Bracketing Switch 14 Custom Switch 17 CPU

Claims (5)

[Claims] 1. An aperture setting circuit, a shutter speed setting circuit, a number setting circuit capable of setting a predetermined number of shots, an exposure level correction amount setting circuit, and a setting value of the exposure level correction amount setting circuit. The exposure level correction circuit that changes the exposure level correction amount stepwise within the predetermined number of sheets and outputs the exposure level correction value. To realize the exposure level correction by the output of the exposure level correction circuit, A correction selection circuit capable of selecting one from a plurality of combinations in which the composition of the correction amounts of the two types of variable elements is changed, and capable of outputting each correction amount after selection, and the correction selection circuit. The aperture value set by the aperture setting circuit is corrected according to the output of the circuit, the shutter time value set by the shutter time value setting circuit is corrected according to the output of the correction selection circuit, and the shutter time value is Control Bracketing apparatus characterized by comprising a exposure control circuit. 2. The bra according to claim 1, wherein the correction amount of the aperture value and the shutter speed value of the correction selection circuit can be selected to be 0 while the number of sheets setting circuit is set. Keting equipment. 3. The bracketing device according to claim 1, further comprising a light emission amount correction circuit for correcting the light emission amount of the flash device connected by the output of the exposure level correction circuit. 4. An operation selection circuit capable of selecting whether to operate only the exposure correction circuit, only the light emission amount correction circuit, or both of them. Alternatively, the bracketing device according to claim 2. 5. The display member for displaying the correction selection state of the correction selection circuit is further provided, and the display member can also display the operation selection state of the operation selection circuit. The bracketing device according to claim 3.