JPH0782192B2 - Auto bracketing camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention is a so-called auto mode in which a plurality of images are taken as a set by automatically changing the exposure correction amount with respect to the proper exposure calculated by the camera body. The present invention relates to a bracketing photographing device.

(Prior Art) In a conventional device of this type, the number of shots is fixed to three, and there is a device that can set a correction amount that applies the same amount of exposure correction to overexposure and underexposure for proper exposure. there were.

On the other hand, there was a device for setting the correction amount for the first exposure-correction shooting, the exposure correction amount for each image, and the number of shots.

(Problems to be Solved by the Invention) However, in an apparatus that can set only the correction amount, there is a problem that the number of shots cannot be changed.

On the other hand, in an apparatus that sets a shooting start correction amount, an exposure correction amount per image, and the number of shots, it is difficult to know whether correction exposure is included, and there are many set values, which makes the operation troublesome.

(Means for Solving Problems) In order to solve the above problems, in the present invention, the number of shots and the exposure correction amount per one are set, and the number of shots is 3, 5, and 7. , 9, 11, 13, 15, 17
The number of shots is odd such as 19 and 19 so that the number of shots on the overexposed side and the underexposed side is the same for one shot for proper exposure.

Further, in the present invention, when the number of shots increases, the over-exposed side and the under-exposed side may exceed the correction amount. Therefore, the maximum correction amount is set to 8 steps, and the number of shots is set to exceed the maximum amount. If the exposure correction amount per image is set to exceed the limit, the number of shots is set to the initial value of 3.

(Operation) In the present invention, the number of shots and the exposure correction amount per shot are set, and the number of shots is not limited to one shot of the proper exposure, but the number of shots on the underexposed side and the proper exposure with respect to the proper exposure. On the other hand, since the number of shots on the overexposure side is the same, the number of shots is an odd number of three or more, so shooting with proper exposure is always performed, and the operation is not so complicated.
Also, when the maximum correction amount exceeds a certain value, the number of shots is limited and reduced, so there is no limit to the exposure correction amount per image, and auto-bracketing with focus on exposure correction Suitable for shooting.

(Embodiment) FIG. 1 is an external view of a data imprintable data back device having an auto bracketing function according to the present invention. Reference numeral 101 denotes a data back device according to the present invention, which can be replaced with a back cover of the camera body and a hinge portion 102, and can be opened and closed in a hinged manner with respect to the camera body. Reference numeral 103 denotes a setting panel unit on which imprint data and auto bracketing function can be set, and buttons 131 to 135 are arranged.
A liquid crystal data display unit 104 displays the data set by the setting panel unit 103. Reference numeral 105 is a battery chamber for accommodating two batteries 106, which are the power source of the data back device 101. Reference numeral 107 denotes a patrone window which can confirm whether or not a film patrol is loaded on the camera body.

The functions of the buttons 131 to 135 of the setting panel unit 107 will be described with reference to FIG.

First, when the battery 106 is housed in the battery chamber 105, a year / month / day display 211 is displayed on the liquid crystal data display unit 104.

201 is a data imprinting mode in which the "DATA" character 214 is lit and the year / month / day display 211, the day / hour / minute display 221, and the film count value display 231 are displayed in this mode.
Each time 31 is pressed, it is switched as shown in FIG.

The year / month / day display 211 indicates March 25, 1988,
The number 88 with the apostrophe “,” 212 indicates the year, and the number 3 with the “M” letter 213 indicates the month.

Also, when the “DATA” character 214 is lit, it is possible to set the data imprinting, and when the imprinting setting button 135 is pressed, the “PRINT” character 215 lights up and the data imprinting is set. It will be imprinted on the surface.

On the other hand, when the “PRINT” character 215 is lit and the imprint setting button 135 is pressed, the “PRINT” character 215 goes out and the data imprint setting is canceled, and the display data is imprinted on the film surface at the time of shooting. It will not be done. Year / month / day display 211
When the display switching button 131 is pressed while is displayed on the liquid crystal data display unit 104, the date / hour / minute display 221 is displayed.

The day / hour / minute display 221 indicates 10:30 on the 25th, and a colon ":" 222 is lit between the hour and minute numbers to indicate that the day / hour / minute is displayed. . When the display switching button 131 is pressed while the date / hour / minute display 221 is displayed on the liquid crystal data display unit 104, the film count value display 231 is displayed.

The film count value display 231 shows a film count value of 000001, and the "FRAME COUNT" character 232 lights up,
After the data is imprinted after the shooting is completed, the data is added one by one.

When the display change button 131 is pressed while the film count value display 231 is displayed on the liquid crystal data display unit 104, the year / month /
Return to day display 211.

The correction of the setting data in the data imprinting mode 201 is similar to the method shown in FIG. 7 of JP-A-62-38440, and each time the select button 132 is pressed, the above-mentioned two-digit blinking and middle two-digit are displayed. Blinking, lower 2 digits blinking, no blinking digit, upper 2
The digit becomes blinking ... And the numerical value of the blinking digit is corrected by adding one by one by pressing the adjust button 133.

Next, in the data imprinting mode 201, when the auto bracketing setting button 134 is pressed, the auto bracketing mode 251 is entered, and the number of shots / exposure correction amount display 261 per image is displayed on the liquid crystal data display unit 104. In the auto bracketing mode 251, the “BKT” character 262 lights up, indicating that the auto bracketing function is set.

In the exposure correction amount display 261 for the number of shots and one shot, the number of shots 263 of "3" is displayed in the upper two digits, and "0.
The exposure correction amount 265 per sheet "3" is displayed. That is, three images are taken in 0.3 steps.
"F-" 264 in the middle two digits indicates "F" indicating that the upper two digits are the number of shots, and "-" indicates the boundary between the number of shots and the exposure correction amount per shot.

Also, the "STEP" character 266 lights up above the lower two digits 265,
The lower two digits 265 indicate that the exposure correction amount is per sheet.

When the display switching button 131 is pressed while the number of shots / exposure compensation amount display 261 per image in the auto bracketing mode 251 is displayed on the liquid crystal data display section 104, the auto bracketing setting button in the data imprinting mode 201 is pressed. The imprint data 271 that was displayed immediately before pressing 134 is displayed. At this time, since the auto bracketing function is set, the "BKT" character 262 remains lit, and if the data imprinting mode 201 is set to imprint the data, the "PRINT" character 215 is illuminated. In addition, since the data is imprinted in data imprinting mode 201, “DATA” character 214
Lights up. The imprinted data 271 in Fig. 2 is the year / month /
Assuming that the auto bracketing setting button 134 is pressed during the day display 211, March 25, 1988 is displayed.

Imprinted data 271 in auto bracketing mode 251
When is displayed on the liquid crystal data display unit 104, the display switching button 131 is pressed to return to the display 261 of the number of shots / exposure correction amount per shot.

On the other hand, when the auto-bracketing setting button 134 is pressed in the auto-bracketing mode 251, the setting of the auto-bracketing function is canceled and the "BKT" character 262 goes out, the data imprinting mode 201 is returned, and the auto-bracketing mode 251 is set. The data that was displayed immediately before is displayed.

Next, the exposure compensation amount display 261 for the number of shots and one shot is 7F-1.3
Photographing in STEP will be described with reference to FIG.

At 7F-1.3STEP, as shown in Fig. 3, the number of shots / exposure compensation amount display 301, at 7F-1.3STEP, as shown in the graph below, 4 steps underexposed, 22/3 steps underexposed, 11/3 steps underexposed Proper exposure 11 / 3-step overexposure 22 / 3-step overexposure 4-step overexposure shooting is performed in this order. Here, as shown in the graph of FIG. 3, the exposure correction amount depends on the camera body-
If you can only set the range from 8 steps to +8 steps, you can set the number of shots from 3 to 19, and you can set the exposure correction amount per one step from 0.3 steps to 2 steps, 19F- If you set 2.0 STEP, it will start from -18 steps +
Exposure compensation of up to 18 steps is required, which causes a problem. That is, if the number of shots is n and the exposure correction amount per shot is x If the relationship between n and x is not such that the exposure correction amount exceeds the settable range.

In FIG. 4, a method of changing the set number of shots and the exposure correction amount per shot in the auto bracketing mode 251 will be described.

In FIG. 4, a display 401 displays the number of shots and the exposure correction amount 3F-0.3STEP per shot in the auto bracketing mode. When the select button 132 is pressed during this display, a display 411 is displayed, which indicates that the number of shots "3" blinks and correction is possible. Adjust button 133 when display 411
Press to change the number of shots to "5", and then adjust button 13
Each time you press 3, the number of shots will be “7”, “9”, “11”, “1”.
If "3", "15", "17", "19" is reached and the adjust button 133 is pressed at "19", the process returns to "3".

When display 411 is flashing the number of shots, select button 132
When is pressed, the display becomes 451 and the exposure compensation amount per image is "0.3".
Flashes to indicate that correction is possible. When the adjustment button 133 is pressed during display 451, the exposure correction amount per image becomes "0.5", and each time the adjustment button 133 is pressed, the exposure correction amount per image becomes "0.7", "1.0", " 1.3 '', `` 1.
It becomes "5", "1.7", "2.0", and if the adjust button 133 is pressed at "2.0", it returns to "0.3".

Then, the display 451 in which the exposure compensation amount per image is blinking
When select button 132 is pressed during
Return to 01.

In the above description, the range of the exposure correction amount is within the range of -8 steps to +8 steps, but the case of exceeding the range will be described below.

As an embodiment of the present invention, when the exposure correction amount per image is prioritized and the exposure correction amount per image that does not satisfy the above formula is set, the number of shots is set to the initial value "3". This is a method that forces setting.

FIG. 5 is an electric circuit diagram according to the present invention. The left side of the broken line in the figure is a circuit on the camera body side to which the data back device 101 is attached, and details thereof are omitted because they are not directly related to the present invention. The right side of the broken line is a circuit on the data back device 101 side.

The microcomputer 501 of the data back device 101 is the first
Power is supplied from the battery 106 shown in the figure, and a clock pulse required for arithmetic processing and timekeeping is obtained by the reference transmission source 503 and the built-in oscillation circuit. The microcomputer 501 has switches 531 to 535 for pressing the buttons 131 to 135 of the setting panel 103.
Has been entered as a closure. Also, data back device
The microcomputer 501 of 101 exchanges the information signal 551 with the microcomputer of the camera body and inputs the control signal 552 for controlling the data back device 101 from the microcomputer of the camera body to the camera of the camera body. The control signal 553 for controlling the main body is output.

Further, the microcomputer 501 outputs a display signal 554 to the liquid crystal data display section 104 and the data imprinting liquid crystal section 505 shown in FIG. 1 to cause these liquid crystal sections to display.

Then, at the time of shooting, the microcomputer 501 outputs the data imprinting signal 555 to turn on the transistor 506 to cause the imprinting lamp 507 to emit light, and data transmitted to the film imprinting liquid crystal part 505 causes the data to be recorded on the film surface. It can be imprinted.

An embodiment of the relationship between the number of shots n and the exposure correction amount x per shot when the microcomputer 501 shown in FIG. 5 operates will be described with reference to the flowchart of FIG.

It starts when the power supply to the data back device 101 is started, and in step S601, key processing for determining the pressed state of the buttons 131 to 135 by the open / closed state of the switches 531 to 535 is performed.

Next, in step S602, the value of the number of captured images n by the key processing is read, and in step S603, the exposure correction amount x per sheet by the key processing is read. Then, in step S604, Is calculated to determine whether or not this value is 8 or less. When the number is 8 or less, the process jumps to step S605, the display processing of the values of the number of captured images n and the exposure correction amount x per image is performed, the display signal 554 is output, and the process returns to step S601.

If it is determined in step S604 that the number exceeds 8, step S6
At 06, the number of shots n is set to 3, and the process jumps to step S605.

As described above, in the second embodiment of the present invention, when the relationship between the number of shots and the exposure correction amount per shot exceeds the constraint condition, the number of shots is set to 3 and the constraint condition is satisfied. In addition, the number of shots is set to the minimum value of 3, and a warning is issued when the constraint condition is exceeded. Further, in general, when performing auto-bracketing shooting, the exposure correction amount per image is considered with priority, so it can be said that this situation is suitable.

Next, the display of the embodiment of the present invention will be described with reference to FIG.

FIGS. 7A and 7B show the case where the exposure amount per image is being corrected, and FIGS. 7C and 7D show the case where the number of shots is being corrected.

19F-0.7STEP of display 701 of FIG. 7 (a) satisfies the formula, but when the adjust button 133 is pressed, the exposure correction amount per image becomes 1.0STEP, but since the formula is not satisfied, the number of shots is reduced. Becomes 3 and the display 702 is displayed.

11F-1.5STEP of display 711 in FIG. 7 (b) satisfies the formula, but if the adjustment button 133 is pressed and the exposure correction amount per sheet is set to 1.7STEP, the formula is not satisfied. The display becomes 712.

In the display 721 of FIG. 7 (c), 9F-2.0STEP satisfies the formula, but if the adjustment button 133 is pressed and the number of shots is set to 11, the formula is not satisfied, and the number of shots becomes 3 and the display 722 is displayed. Become.

In the display 731 of FIG. 7 (d), 13F-1.3STEP satisfies the formula, but if the adjustment button 133 is pressed and the number of shots is set to 15, the formula is not satisfied, so the number of shots is 3
And display 732.

As described above, if it is attempted to set beyond the constraint conditions, priority is given to the exposure compensation amount per image, which is considered to be important in auto bracketing photography, and the number of shots is set to the minimum value of 3 to improve usability and shooting. There is also a warning that the number of sheets has become 3.

(Effect of the Invention) As described above, according to the present invention, it is more important when the relationship between the number of shots, which is the set value for auto-bracketing shooting, and the exposure correction amount per shot does not satisfy the constraint condition. The warning display is given by giving priority to the exposure correction amount per image, which is an element, and setting the number of images to be taken to be the minimum value of 3 as a constraint condition and setting the number of images to be taken to 3.

Also, the number of shots and the amount of correction per image are displayed in a 7-segment, 6-digit display similar to the year / month / day display to facilitate the setting operation.

[Brief description of drawings]

FIG. 1 is an external view of the data back device, FIG. 2 is a view showing switching of displays, FIG. 3 is an explanatory diagram of auto bracketing shooting, and FIG. 4 is the number of shots and an exposure correction amount per shot. FIG. 5 is an electric circuit diagram, FIG. 6 is a flowchart, and FIG. 7 is a diagram showing switching of display according to the present invention. (Explanation of symbols of main parts) 104 ... Liquid crystal data display section 501 ... Microcomputer

Claims (3)

[Claims] 1. An auto-bracketing apparatus capable of shooting a plurality of images by changing an exposure value by a certain shift interval, wherein the shift interval amount and the number of shots can be arbitrarily set. In the image capturing apparatus, a determination unit that determines whether or not the entire shift range determined by the set number of captured images and the set shift interval is within a predetermined shift range, and the determination unit determines a value outside the predetermined shift range. If it is determined that the automatic bracketing device has the above-described setting value, the automatic bracketing device includes a changing unit that changes at least one of the set values. 2. The automatic bracketing photographing apparatus according to claim 1, wherein the changing unit changes the set value to a settable minimum value. 3. The auto-bracketing photographing device according to claim 1, wherein the changing unit changes only the number of photographed images.