JP3563807B2 - camera - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a camera having means for setting exposure correction and means for fixing photometric values and controlling exposure correction using means for fixing photometric values (AE lock means).
[0002]
[Prior art]
In recent years, the operation of a camera is programmed, and a camera in which various shooting modes are set has been proposed.
[0003]
Among such modes, for example, in the program mode, the shutter speed and the aperture value are automatically set according to a program based on a photometric value or the like. This set value is displayed on, for example, a display provided in the camera body, and indicates the value to the photographer.
[0004]
On the other hand, a photographer may want to perform photographing under various photographing conditions depending on his / her preference, and may want to perform photographing with an under or over exposure instead of an exposure with a value determined by a photometric member of such a camera.
[0005]
In this mechanism, the display is provided with an exposure correction display section for displaying the number of correction steps in the form of a bar scale, and by operating an exposure correction input dial operation member provided on the camera body, the index mark is displayed. The photographer moves from the correction "0" position (hereinafter, referred to as an unset position) set at the center position of the display section to the "+" or "-" side, and the photographer looks at the movement position of the mark to determine the number of correction steps. Is adjusted to a desired position.
[0006]
On the other hand, this exposure correction operates only when the dial operation member provided on the camera body is operated while pressing the exposure correction setting button provided on the camera body, and the correction of the correction and the return to the unset position are also performed. Operation of the dial operation member is required while the exposure compensation setting button is pressed.
[0007]
[Problems to be solved by the invention]
When taking a picture with an exposure intended by the photographer, the exposure amount automatically set by the photometry member of the camera may not be sufficient, for example, "black in this part is black", "white in this part" There are many demands to use AE lock and exposure compensation at the same time, as in the case of exposure determination such as “white”. In order to realize this requirement, in the related art, it is necessary to operate two exposure compensation input members. There was a problem that sex was bad.
[0008]
An object of the present invention is to improve operability. One is that the setting of AE lock and exposure correction can be realized by a series of operations, and the other is that the setting can be operated by one exposure correction input member. It is to be.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a camera including an exposure correction input member, a unit for fixing a photometric value, a unit for setting an exposure correction value, and a unit for fixing a photometric value and controlling exposure correction. Control means for setting the exposure correction amount by operating the means for setting the exposure correction value while operating the exposure correction input member to fix the photometric value and operating the exposure correction input member while the exposure correction input member is being operated. It is characterized by.
[0010]
According to this configuration, the exposure compensation input member isFixing the metering value and setting the exposure compensation amount by simply operating the means for setting the exposure compensation value while operatingAnd the operability of the exposure compensation of the camera is improved.
[0011]
According to a second aspect of the present invention, there is provided a camera including an exposure correction input member, a unit for fixing a photometric value, a unit for setting an exposure correction value, and a unit for controlling a photometric value and controlling exposure correction. In a state in which the exposure compensation input member is operated, the exposure compensation value setting means is operated to operate the means for setting the exposure compensation value, thereby fixing the photometric value and having a control means for setting the exposure compensation amount.
[0012]
According to this configuration, the exposure compensation input member isBy operating the means for setting the exposure compensation value after the operation, the exposure compensation amount can be set.Thus, the operability of the camera for exposure compensation is improved.
[0013]
The invention according to claim 3 is:MeasurementMeans for fixing the light value;Means for setting an exposure compensation value;Means for fixing the photometric value and controlling the exposure compensation,In the first operation of the means for setting the exposure compensation valueFix the photometric value,In subsequent operationsIt is characterized by having control means for correcting the exposure correction amount.
[0014]
According to this configuration,Operate the means for setting the exposure compensation value sequentiallyBy doing so, the fixing of the photometric value and the exposure correction can be performed sequentially, and the operability of the exposure correction of the camera is improved.
[0015]
The invention according to claim 4 isMinuteMeans for switching metering modes such as split metering, average metering, partial metering, spot metering, etc., means for fixing the metering value, and exposurecorrectionThe valueMeans to setAnd a camera having means for fixing a photometric value and controlling exposure correction, a photometric mode for measuring a very limited portion of the screen, such as partial photometry or spot photometry, is selected by the photometric mode switching means. If you haveSaidExposure compensationBy operating the means for settingExposure compensation while fixing the photometric valueamountIt is characterized by having control means for setting
[0016]
According to this configuration, when the light metering mode for metering a very limited portion of the screen, such as partial light metering or spot light metering, is selected by the light metering mode switching unit, the exposure correction is performed.By operating the means for settingExposure compensation while fixing the metering valueamountCan be set.
According to a fifth aspect of the present invention, in the fourth aspect, there is provided a control means for releasing the fixing of the photometric value by setting the exposure correction amount to zero while the photometric value is fixed. I do.
According to this configuration, the fixed state of the photometric value can be released by operating the means for setting the exposure correction, and the operability of the exposure correction of the camera is improved.
[0017]
According to a sixth aspect of the present invention, there is provided a light metering mode switching unit such as a split metering unit, an average metering unit, a partial metering unit, and a spot metering unit; In a camera provided with means for controlling correction, when a light metering mode for metering a very limited portion of the screen, such as partial metering or spot metering, is selected by the metering mode switching means, It is characterized in that there is provided control means for fixing the photometric value in the first operation of the means for setting the value and correcting the exposure correction amount in the subsequent operation.
[0018]
According to this configuration,When a photometry mode for photometry of a very limited portion of the screen such as partial photometry or spot photometry is selected by the photometry mode switching unit, the photometry value is set by the first operation of the exposure correction value setting unit. Fix the exposure and correct the exposure compensation amount in subsequent operations.Thus, the operability of the camera for exposure compensation is improved.
[0019]
According to a seventh aspect of the present invention, there is provided a light metering mode switching unit such as a split metering, an average metering, a partial metering, and a spot metering, a unit for fixing a metering value, a unit for setting an exposure correction value, and a method for fixing or exposing a metering value. In the camera having means for controlling the correction, the metering mode is forcibly switched to partial metering or spot metering by operating the means for setting the exposure correction value, and the metering is performed. It has a control means for setting a value.
[0020]
According to this configuration,Since the metering mode is forcibly switched to the partial metering or the spot metering by the operation of the means for setting the exposure correction value and the metering is performed, and the metering value is fixed and the exposure correction value is set,The operability of the exposure compensation of the camera is improved.
[0033]
【Example】
<First embodiment>
FIG. 2 is a block diagram showing the electric control of the camera of the present invention. Reference numeral 1 denotes a microcomputer for controlling the movement of each part of the camera. Reference numeral 2 denotes a lens control circuit that drives and controls a focus adjustment motor and a diaphragm blade control motor of a photographic lens described later. The lens control circuit 2 performs serial communication via DBUS while receiving the LCOM signal from the microcomputer 1. The motor drive information is received by the communication, and the drive of the motor is controlled based on the information. At the same time, various information (focal length, etc.) of the lens is sent to the microcomputer 1 by the communication.
[0034]
Reference numeral 3 denotes a liquid crystal display circuit for driving a later-described liquid crystal display for notifying the photographer of the remaining battery level of the camera, the number of shots, the TV value, the AV value, the exposure correction amount, and the like. The liquid crystal display circuit 3 performs serial communication via DBUS while receiving the DPCOM signal from the microcomputer 1. The data of the display content is received by the communication, and a liquid crystal display described later is driven according to the data.
[0035]
Reference numeral 4 denotes a switch sense circuit, which is a circuit for reading the state of a switch for the photographer to set each photographing condition or a switch indicating the state of the camera, and sending the read state to the microcomputer 1 while receiving the SWCOM signal. , The switch data is transmitted to the microcomputer 1 by serial communication via DBUS. Also, the dial value is counted up / counted down according to the input value of an electronic dial described later, and while receiving the SWCOM signal, the count value is sent to the microcomputer 1 by serial communication via DBUS.
[0036]
Reference numeral 5 denotes a flash light emission dimming control circuit, which controls a flash emission function and a light emission stop function by TTL light control. While receiving the SRCOM signal, the strobe light emission dimming control circuit 5 performs serial communication with the microcomputer 1 via DBUS, receives data related to strobe control, and performs various controls. This circuit also functions as an interface when an external strobe described later is attached to the camera. Therefore, when an external strobe described later is attached, communication with the external strobe described later is performed and information such as whether or not there is an auxiliary light is sent to the microcomputer 1. Conversely, it also has a role of transmitting a control signal from the microcomputer 1 to an external flash described later.
[0037]
Reference numeral 6 denotes a focus detection circuit, which comprises a line sensor for performing autofocusing according to the existing phase difference detection method, and a circuit unit for storing and reading out the information. The microcomputer 1 measures the distance by an existing algorithm based on the A / D value of the sensor output, calculates the lens drive amount, and communicates the calculated lens drive amount to the lens control circuit 2 to communicate the lens. Drive and focus.
[0038]
Reference numeral 7 denotes a photometry circuit, which performs photometry of the subject with a photometry sensor (not shown) divided into a plurality of parts, and sends a photometry output to the microcomputer 1 under the control of the microcomputer 1. The microcomputer 1 performs A / D conversion on the sent photometric output, selects outputs from a plurality of photometric sensors according to the set photometric mode, calculates the luminance by an algorithm according to the photometric mode, and calculates the luminance based on the luminance. Next, the exposure conditions (aperture, shutter speed) are determined.
[0039]
Reference numeral 8 denotes a shutter control circuit which controls the running of a shutter front curtain and a rear curtain (not shown) according to a control signal of the microcomputer 1. Reference numeral 9 denotes a feed motor / charge motor control circuit for feeding (winding and rewinding) the film in accordance with a control signal from the microcomputer 1. The motor control circuit also controls a mirror up / charge (mirror down) motor.
[0040]
SW1 is a first switch for starting the operation of the camera. When the microcomputer 1 recognizes that the first switch SW1 has been turned on, it starts photometry, distance measurement, and display. SW2 is a second switch interlocked with the release switch of the camera, and starts the exposure operation when the microcomputer 1 recognizes that the second switch SW2 is turned on.
[0041]
The X contact is turned on at the timing of the completion of running of the front curtain of the shutter, and serves to notify the flash emission dimming control circuit 5 of the flash emission timing.
[0042]
SW3 is a third switch for switching the camera mode (TV priority, AV priority, manual, program, etc.).
[0043]
10 is for changing the TV value, AV value, photometric mode, etc.As a means to set the exposure compensation valueIt is an electronic dial. For example, when the electronic dial 10 is rotated while pressing the mode switch of the third switch SW3, the priority is changed to TV priority → AV priority → manual → program → TV priority → AV priority → manual → program 、, and the photographer's It can be set to the intended mode. When the electronic dial 10 is rotated in the reverse direction, the mode is changed in the order of program → manual → AV priority → TV priority → program → ‥‥.
When the TV priority is set as a mode by the third switch SW3 and the electronic dial 10, the third switch SW3 is turned off and only the electronic dial 10 is rotated to obtain a TV value desired by the photographer. Can be set.
If the AV priority has already been set as the mode by the third switch SW3 and the electronic dial 10, the third switch SW3 is turned off and only the electronic dial 10 is rotated to set the AV desired by the photographer. Value can be set.
[0044]
SW4 is a fourth switch for setting the AV value at the time of manual operation. When the manual is selected by the third switch SW3 and the electronic dial 10, the third switch SW3 and the fourth switch SW4 are pressed. If the electronic dial 10 is rotated without rotating the TV dial, the TV value is increased / decreased by the amount of rotation, and the TV value can be set. Up / down and the AV value can be set.
[0045]
SW5 is used to switch the photometry mode (divided photometry, average photometry, partial photometry, spot photometry, etc.).As a metering mode switching meansThis is the fifth switch. By rotating the electronic dial 10 while pressing the fifth switch SW5, a desired photometric mode is set.
[0046]
SW6 is used to set the exposure compensationExposure compensation input memberThis is the sixth switch. Here, the desired correction value is set by rotating the electronic dial 10 while pressing the sixth switch SW6. If the rotation direction of the electronic dial 10 is, for example, a clockwise direction, the correction amount becomes positive and the set amount increases.
[0047]
By the way, in the present embodiment, the microcomputer 1 operates so that the photometric value is locked when the sixth switch SW6 for setting the exposure compensation is pressed in a situation where the exposure compensation is not set.
[0048]
SW7 is a clear switch, which releases the AE lock when pressed when the AE lock is applied, and sets the exposure correction amount to 0 when pressed when the AE lock is applied.
[0049]
Reference numeral 11 denotes an external display device, which is driven by the liquid crystal display circuit 3. Reference numeral 12 denotes a liquid crystal display device in the finder, which is driven by the liquid crystal display circuit 3 similarly to the external display device 11. An interchangeable lens 13 is controlled through the lens control circuit 2. Reference numeral 14 denotes an external flash, which is controlled through a flash light emission dimming control circuit 5. The strobe has a power supply separate from the camera body.
[0050]
Next, a series of operations of the camera will be briefly described with reference to the flowchart of FIG.
The numbers in parentheses indicate step numbers.
[0051]
First, at (300), the power of the camera is turned on due to factors such as the switch being pressed, and based on the information of the switch sense circuit 4, switching of various modes and input of various set values are performed at (301). When the switch is changed, the information is transferred to the liquid crystal display circuit 3 to correct the display data.
[0052]
It is determined (302) whether the first switch SW1 is pressed or not pressed. If the first switch SW1 is pressed, the process proceeds to (306) for photometry and distance measurement. Then, proceed to step (303) for determining whether or not the power is to be turned off. If the power is to be turned off, proceed to (304). The light is turned off by the display circuit 3 and the power is turned off. If the power is not turned off, the process returns to the initial (301) switch information input. Thus, when the power of the camera is turned on for some reason, the state of the switch is checked and the display is switched by keeping the power on for a certain period of time.
[0053]
If the first switch SW1 is depressed in (302), the process proceeds to (306), and in the photometric step (306), the photometric circuit 7 performs photometric measurement of the subject with the plurality of photometric sensors divided by the microcomputer. In step 1, the photometric output is A / D converted, the outputs of a plurality of photometric sensors are selected according to the set photometric mode, the luminance is calculated by an algorithm according to the photometric mode, and the exposure condition (aperture) is calculated based on the luminance. , Shutter speed).
[0054]
In the next distance measurement step (307), the data is accumulated in the line sensor and read out using the focus detection circuit 6, and the distance is measured by the existing algorithm based on the A / D value of the sensor output. After calculating the lens driving amount, the calculated lens driving amount is communicated to the lens control circuit 2 to drive and focus the lens.
[0055]
In (308), the AV value / TV value set in (306) is displayed on the liquid crystal display device 12 in the finder and the external display device 11 by the liquid crystal display circuit 3. If the result of the distance measurement in step (307) is in focus, an in-focus display is also performed.
[0056]
Next, it is determined (309) whether or not the camera is in a state in which release is permitted. For example, when the AF mode is the “one-shot mode”, the result of the distance measurement in (307) is determined to be in focus, the release is permitted, and the process proceeds to (310) to check the second switch SW2. If not in focus, the process returns to (301) to check the switch. If the first switch SW1 is ON, photometry, distance measurement, and display are performed again.
[0057]
When the release is permitted, it is determined whether or not the second switch SW2 is pressed, and it is determined whether or not to proceed to the subsequent release operation. When the second switch SW2 is ON, the process proceeds to (311) to perform a release operation, and when the second switch SW2 is OFF, the process returns to (301) to check the switch. When the first switch SW1 is ON, photometry, distance measurement, and display are performed again.
[0058]
When the release operation is started, the mirror is raised by the feed motor / charge motor control circuit 9 in (311), and the aperture amount determined in (306) is communicated to the lens 13 by the lens control circuit 2, A narrowing-down operation is performed so as to obtain a set exposure amount.
[0059]
Next, in (312), the travel control of the shutter first curtain and the rear curtain (not shown) is performed using the shutter control circuit 8 so as to obtain the TV amount determined in (306).
[0060]
Further, in step (313), the mirror is lowered by the feed motor / charge motor control circuit 9, and at the same time, the shutter is charged. In step (306), the lens control circuit 2 communicates with the lens 13 to stop the aperture. To open.
[0061]
Finally, in (314), the film is wound using the feed motor / charge motor control circuit 9 in accordance with the control signal from the microcomputer 1, and the process returns to (301).
[0062]
Next, this embodiment will be described with reference to the flowchart of FIG. The flowchart of FIG. 1 shows a part of the operation of the switch input and display in step 301 of FIG.
[0063]
First, in (101), it is determined whether or not the sixth switch SW6 for setting the exposure compensation is pressed. If not, the process proceeds to (109) and the exposure compensation is not set. If the sixth switch SW6 is pressed, the process proceeds to (103) to determine whether or not the AE lock has been applied in order to apply the AE lock before setting the exposure correction.
[0064]
If it is determined that the AE lock has not been set, the AE lock is set in (104). If the photometry has not been performed, the photometry is performed and the photometric value is locked. If the photometry has already been performed, the latest photometry value is locked. If the AE lock has already been applied, the process directly proceeds to the next step (105).
[0065]
At (105), it is determined whether or not the exposure correction value has been input by the electronic dial 10, that is, whether or not the electronic dial 10 has been rotated. If not, the process directly proceeds to (109) because no setting is performed. If the exposure correction value has been input (106), the exposure correction amount is increased or decreased according to the value of the electronic dial 10 to the already set correction amount.
[0066]
In step (107), to determine whether to release the AE lock, it is determined whether the correction result of the exposure correction amount is 0. If the exposure correction amount is 0, the process proceeds to (108) and the AE lock is performed. If the value is not 0, the process proceeds to (109) with the AE lock applied and the exposure compensation set at the same time.
[0067]
In (109), it is determined whether or not the clear switch SW7 has been pressed. If the clear switch SW7 has not been pressed, the process ends. If the clear switch SW7 has been pressed, the AE lock is released in (110) and the exposure compensation amount is simultaneously adjusted. Set to 0.
[0068]
By using the present embodiment described above, it is possible to set the exposure compensation in a state where the AE lock is applied, and it is possible to quickly set the exposure suitable for the drawing of the photographer.
[0069]
<Second embodiment>
In the first embodiment, the embodiment using the clear switch SW7 has been described. In the present embodiment, an example in which the clear switch SW7 is not used will be described with reference to the flowchart of FIG.
[0070]
At (401), it is determined whether or not the sixth switch SW6 for setting the exposure compensation is pressed, and if not, the process ends without setting the exposure compensation. If the sixth switch SW6 has been pressed, it is determined in step (403) whether or not the exposure correction value has been input by the electronic dial 10, that is, whether or not the electronic dial has been rotated. I do. If the exposure correction value has been input, the process proceeds to the next (404).
[0071]
In order to set the exposure compensation with the AE locked, it is determined in step (404) whether the AE lock is already set. If the AE lock is not set, the photometry is still performed in (405). If not, the photometry is performed and the photometric value is locked. If the photometry has already been performed, the latest photometry value is locked, and the value input by the electronic dial 10 is reduced by one. 404) To determine whether the AE lock is set.
[0072]
If the AE lock has already been applied, the exposure correction amount is corrected according to the value of the electronic dial 10 in order to perform exposure correction (406). In step (405), when the electronic dial 10 is input by one in the plus direction and the AE lock is applied, if minus one is input here, it is calculated as zero. Conversely, here, the plus correction is performed only when the plus 1 is input. In addition, in the case where the electronic dial is input in the minus direction and the AE lock is applied in (405), it is calculated as 0 if the plus 1 is input here. Conversely, here, minus correction is performed only when minus 1 is input.
[0073]
In order to determine whether or not to release the AE lock, it is determined in step (407) whether or not the correction result of the exposure correction amount is 0. If the correction result is 0, the AE lock is released in step (408) and the processing ends. . If it is not 0, the process ends with AE lock and exposure correction applied.
[0074]
The above operation will be described with reference to display examples in the viewfinder of FIGS. In the figure, reference numeral 501 denotes an AE lock mark displayed when the AE lock is activated, 502 denotes a shutter speed value, 503 denotes an aperture value, and 504 denotes an exposure correction amount. First, with reference to FIG. 5, a description will be given of the process of setting the exposure correction to the plus side, returning the exposure correction amount to 0, and releasing the AE lock. In this embodiment, it is assumed that the exposure mode is F5.6 with aperture priority.
[0075]
FIG. 5A shows a display before the electronic dial 10 is pressed while the sixth switch SW6 is being pressed. The exposure correction amount is zero, and the AE lock is not applied.
[0076]
In FIG. 5A to FIG. 5B, the one-step electronic dial 10 is input to the plus side while pressing the sixth switch SW6.
[0077]
FIG. 5B shows that the AE lock is activated and the AE lock mark 501 is displayed.Indicates status. The locked photometric value is 1/500 in shutter speed with respect to the aperture F5.6.
[0078]
5B to FIG. 5C, the one-step electronic dial 10 is further input to the plus side while pressing the sixth switch SW6.
[0079]
FIG. 5C shows a state in which the value locked in FIG. 5B is subjected to an exposure correction of plus 0.5 steps. Due to the exposure compensation of 0.5 steps, 1/500 at the shutter speed was 1/350, which is a half step slower.
[0080]
From FIG. 5C to FIG. 5D, the one-step electronic dial 10 is further input to the plus side while pressing the sixth switch SW6.
[0081]
FIG. 5D shows a state in which the value of FIG. 5C has been subjected to an additional 0.5-step exposure correction. That is, the plus one-step exposure correction is performed. Due to the exposure correction of plus 1.0 stop, the shutter speed was 1/500, which was 1/250 slower by 1/500.
[0082]
In FIG. 5D to FIG. 5E, the one-step electronic dial 10 is input to the minus side while pressing the sixth switch SW6.
[0083]
FIG. 5E shows a state in which the value of FIG. 5D is subjected to an exposure correction of minus 0.5 steps. In other words, a total of 0.5 step exposure correction has been applied. Thus, the shutter speed was 1/350.
[0084]
In FIG. 5E to FIG. 5F, the one-step electronic dial 10 is further input to the minus side while pressing the sixth switch SW6.
[0085]
FIG. 5F shows a state in which the value of FIG. 5E is further subjected to an exposure correction of minus 0.5 steps. That is, the correction amount becomes 0 in total, the exposure correction is released, and the AE lock is released at the same time. Then, the AE lock mark 501 disappeared, and the shutter time was changed from 1/500 to 1/1000 as seen in a slightly brighter place than when the AE lock in FIG. 5B was applied.
[0086]
Next, an example in which the AE lock is applied and the AE lock is released before the exposure correction is performed will be described with reference to FIG.
[0087]
FIG. 6A shows a display before the electronic dial 10 is pressed while pressing the sixth switch SW6. The exposure correction amount is 0, and the AE lock is not applied.
[0088]
From FIG. 6A to FIG. 6B, the one-step electronic dial 10 is input to the plus side while pressing the sixth switch SW6.
[0089]
In FIG. 6B, the AE lock is activated and the AE lock mark 501 is displayed. The locked photometric value is 1/500 in shutter speed with respect to the aperture F5.6.
[0090]
In FIG. 6B to FIG. 6C, the one-step electronic dial 10 is input to the minus side while pressing the sixth switch SW6.
[0091]
FIG. 6C shows a state in which the electronic dial 10 is rotated in a direction opposite to the direction in which the AE lock is applied in FIG. 6B. That is, the correction amount becomes 0 in total, the exposure correction is released, and the AE lock is released at the same time. Therefore, the AE lock mark 501 disappears and a slightly darker place than when the AE lock of FIG.ToAs a result, it changed from 1/500 to 1/125.
[0092]
By using the present embodiment described above, the AE lock can be applied and released by the same operation as the operation for applying the exposure correction, so that it is possible to quickly set the exposure suitable for the photographer's drawing. Become. Further, it is not necessary to perform various operations, and the operability is improved.
[0093]
<Third embodiment>
In the above embodiment, the case where one electronic dial is provided and the exposure dial is turned while pressing the sixth switch SW6 for setting the exposure correction to set the exposure correction has been described. A case in which one electronic dial is used exclusively for exposure correction input will be described.
[0094]
FIG. 7 is a block diagram illustrating the electric control of the camera according to the present embodiment.Second electronic dial 15 as a means for setting an exposure correction valueHas been added. Here, the second electronic dial 15 is referred to as a sub electronic dial 15.
[0095]
Here, the sub electronic dial 15 is a dedicated electronic dial for inputting an exposure correction, and an AE lock function and an operation of correcting an exposure correction amount by the sub electronic dial 15 described below are features of the present embodiment.
[0096]
This embodiment will be described with reference to FIGS.
[0097]
First, an example will be described with reference to FIG. 8 in which exposure correction is performed by one step simultaneously with AE lock with one input of the sub electronic dial 15, and then AE lock is performed with one input to the sub electronic dial 15 with reference to FIG. An example in which exposure correction is performed by one step with another input will be described.
[0098]
The flowchart of FIG. 8 will be described.
[0099]
First, to determine whether or not to perform exposure correction, it is determined in step (801) whether or not the exposure correction value has been input by the sub electronic dial 15, that is, whether or not the electronic dial has been rotated. Exit as is. If it has been input, the process proceeds to AE lock determination.
[0100]
In order to apply the AE lock, it is determined whether or not the AE lock is applied in (803). If it is determined that the AE lock is not applied, the photometry is performed if the photometry has not been performed in (804). And lock the value. If the photometry has already been performed, the latest photometry value is locked. If the AE lock has already been applied, the process does not proceed to (804), but proceeds to the correction of the exposure correction amount in (805).
[0101]
In the correction of the exposure correction amount in (805), the correction amount is increased or decreased in accordance with the value of the sub electronic dial 15 input to the already set correction amount.
[0102]
Next, to determine whether or not to release the AE lock, it is determined whether or not the correction result of the exposure correction amount is 0 in (806), and if it is 0, the AE lock is released in (807) and the processing is terminated. I do. If it is not 0, the process ends with AE lock and exposure correction applied.
[0103]
Next, the flowchart of FIG. 9 will be described.
[0104]
First, to determine whether or not to perform exposure correction, it is determined in step (901) whether or not the exposure correction value has been input by the sub electronic dial 15, that is, whether or not the electronic dial has been rotated. Exit as is. If it has been input, the process proceeds to AE lock determination.
[0105]
In order to apply the AE lock, it is determined in step (903) whether the AE lock has already been applied. If the AE lock has not been applied, in step (904), if the photometry has not been performed, the photometry is performed and the value is locked. . If the photometry has already been performed, the latest photometry value is locked. Next, proceeding to (905), in order to correct the count value by the amount required for the AE lock, the input value of the sub electronic dial 15 is reduced by one, and if it is 3 to the right, it is 2 to the right, and if it is 2 to the left, it is 1 to the left. And returns to (903) again to determine whether the AE lock has been applied. If the AE lock has already been applied, the process proceeds to (906) to correct the exposure correction amount.
[0106]
In (906), the exposure correction amount is corrected according to the input value of the sub electronic dial 15. If the sub-electronic dial 15 is input in the plus direction by one and the AE lock is applied in (904), if the minus one is input here, it is calculated as zero. Conversely, here, the plus correction is performed only when the plus 1 is input. If the sub-electronic dial 15 is input in the negative direction by one and the AE lock is activated in (904), if the plus one is input here, it is calculated as zero. Conversely, here, minus correction is performed only when minus 1 is input. In this way, even if the exposure correction amount is 0 and the AE lock is set, if +1 or -1 is input as appropriate, the AE lock is released as described later.
[0107]
In order to release the AE lock, it is determined in step (907) whether or not the correction result of the exposure correction amount is 0. If the correction result is 0, the flow advances to (908) to release the AE lock and terminate. If it is not 0, the process ends with AE lock and exposure correction applied.
[0108]
By using the present embodiment, the AE lock operation and the exposure correction operation can be performed only by operating the sub electronic dial 15, and it becomes very easy for the photographer to determine the exposure according to the photographing intention. Greatly improve. In addition, there is less chance of missing a photo opportunity in the sense that a plurality of operation members need not be operated.
[0109]
<Fourth embodiment>
In the present embodiment, the above-described one operation of the AE lock and the exposure correction setting is performed only when the light metering mode is set to a mode (partial metering or spot metering) for metering a limited area. An embodiment will be described.
[0110]
This embodiment will be described with reference to FIGS.
[0111]
First, an example in which one step of exposure correction is performed simultaneously with AE lock with one input of the sub electronic dial 15 will be described with reference to FIG. 10, and then AE lock will be performed with one input of the sub electronic dial 15 with reference to FIG. An example in which exposure correction is performed by one step with another input will be described.
[0112]
The flowchart of FIG. 10 will be described.
[0113]
First, to determine whether or not to perform exposure correction, it is determined in step (1001) whether or not an exposure correction value has been input by the sub electronic dial 15, that is, whether or not the electronic dial has been rotated. Exit as is. If it has been input, the flow proceeds to the determination of the photometry mode in (1003).
[0114]
In order to change the correspondence depending on the photometry mode, it is determined in step (1003) whether the photometry mode is set to a mode for performing photometry in a very limited range such as partial photometry or spot photometry. If the mode for metering a limited range is set, the process proceeds to (1005) to perform the AE lock operation. If the mode for metering a wide range, such as average metering or split metering, is set, The AE lock is not activated by the electronic dial 15, and the process proceeds to (1004) to perform the exposure correction, and the correction amount is increased or decreased to the already set correction amount according to the input value of the sub electronic dial 15. And it ends as it is.
[0115]
To apply the AE lock, it is determined whether the AE lock is applied or not in (1005). If it is determined that the AE lock is not applied, in (1006), the photometry has not yet been performed. If the photometry is performed, the photometry value is locked. If the photometry has already been performed, the latest photometry value is locked. If the AE lock has already been applied, the flow advances from (1005) to (1007) to correct the exposure correction amount.
[0116]
In the correction of the exposure correction amount in (1007), the correction amount is increased or decreased to the already set correction amount according to the input value of the sub electronic dial 15.
[0117]
Next, in order to determine whether or not to release the AE lock, it is determined whether or not the correction result of the exposure correction amount is 0 in (1008), and if it is 0, the AE lock is performed in (1009). Release and end. If it is not 0, the process ends with AE lock and exposure correction applied.
[0118]
Next, the flowchart of FIG. 11 will be described.
[0119]
First, in order to determine whether or not to perform exposure correction, it is determined in step (1101) whether or not the exposure correction value has been input by the sub electronic dial 15, that is, whether or not the electronic dial has been rotated. Ends as it is. If it has been input, the process proceeds to the determination of the photometric mode in (1103).
[0120]
In order to change the correspondence depending on the photometry mode, it is determined in step (1103) whether the photometry mode is set to a mode for measuring a very limited range such as partial photometry or spot photometry. If the mode for metering a limited range is set, the procedure proceeds to (1105) to perform the AE lock operation. If the mode for metering a wide range such as average metering or split metering is set, The AE lock is not activated by the electronic dial 15 and the process proceeds to (1104) to apply the exposure correction, and the correction amount is increased or reduced to the already set correction amount according to the input value of the sub electronic dial 15. And it ends as it is.
[0121]
To apply the AE lock, it is determined in step (1105) whether the AE lock has already been performed. If it is determined that the AE lock has not been performed, in step (1106), if the photometry has not been performed, the photometry is performed, and the value is obtained. Lock. If the photometry has already been performed, the latest photometry value is locked. Next, proceeding to (1107), in order to correct the count value by the amount required for the AE lock, the input value of the sub electronic dial 15 is reduced by one, and if the value is 3 to the right, it is 2 to the right, and if it is 2 to the left, it is 1 to the left. It interprets and returns to (1105) again to determine whether the AE lock is locked. If the AE lock has already been applied, the process does not proceed to (1106), but proceeds to (1108) to correct the exposure correction amount.
[0122]
In (1108), the exposure correction amount is corrected according to the input value of the sub electronic dial 15. When the AE lock is applied by inputting 1 to the sub electronic dial 15 in the plus direction and (1106), when -1 is input here(When the AE lock is applied by one input of the sub electronic dial 15 and another input is performed)Is calculated as 0. Conversely, here, the plus correction is performed only when the plus 1 is input. When the AE lock is activated by inputting 1 to the sub-electronic dial 15 in the negative direction (1106), if +1 is input here, it is calculated as 0. Conversely, here, minus correction is performed only when minus 1 is input. In this way, even if the exposure correction amount is 0 and the AE lock is set, if +1 or -1 is input as appropriate, the AE lock is released as described later.
[0123]
In order to release the AE lock, it is determined in step (1109) whether the correction result of the exposure correction amount is 0. If the correction result is 0, the process proceeds to (1110), in which the AE lock is released and the process ends. If it is not 0, the process ends with AE lock and exposure correction applied.
[0124]
By using this embodiment, it is possible to set the exposure correction and the AE lock to one operation in consideration of the photometry mode, and to improve the operability in accordance with the concept of the photometry mode.
[0125]
<Fifth embodiment>
In the present embodiment, an example will be described in which, when one operation of AE lock and exposure correction setting is performed, the light metering mode is forcibly set to a mode (partial metering, spot metering) for metering a limited area.
[0126]
This embodiment will be described with reference to FIGS.
[0127]
First, referring to FIG. 12, an example will be described in which one step of exposure correction is performed simultaneously with AE lock with one input of the sub electronic dial 15, and then AE lock is performed with one input of the sub electronic dial 15 with reference to FIG. An example in which exposure correction is performed by one step with another input will be described.
[0128]
The flowchart of FIG. 12 will be described.
[0129]
First, in step (1201), it is determined whether or not the exposure correction value has been input by the sub electronic dial 15, that is, whether or not the electronic dial has been rotated. Exit as is. If it has been input, the process proceeds to AE lock (1203).
[0130]
To apply the AE lock, it is determined in step (1203) whether the AE lock is applied or not. If it is determined that the AE lock is not applied, in step (1204), partial light measurement or spot light measurement is performed. The mode is switched to a photometry mode for photometry in a very limited range, photometry is performed, and the value measured in step 1205 is AE-locked. If the AE lock has already been applied, the process does not proceed to (1204), but proceeds to the correction of the exposure correction amount in (1206).
[0131]
In the correction of the exposure correction amount in (1206), the correction amount is increased or decreased according to the input value of the sub electronic dial 15 to the already set correction amount.
[0132]
Next, in order to determine whether or not to release the AE lock, it is determined whether or not the correction result of the exposure correction amount is 0 in (1207), and if it is 0, the AE lock is released in (1208). At the same time, the process returns to the original photometry area and the process ends. If it is not 0, the process ends with AE lock and exposure correction applied.
[0133]
Next, the flowchart of FIG. 13 will be described.
[0134]
First, in step (1301), it is determined whether or not an exposure correction value has been input by the sub electronic dial 15, that is, whether or not the electronic dial has been rotated. Exit as is. If the AE lock has been input, the process proceeds to (1303) AE lock determination.
[0135]
In order to apply the AE lock, it is determined in step (1303) whether or not the AE lock has already been applied. If the AE lock has not been applied yet, in step (1304), a very limited area such as partial metering or spot metering is used. Is switched to the photometry mode for photometry, and photometry is performed (1305), and the measured value is AE-locked. Next, in (1306), in order to correct the count value by the amount required for the AE lock, the input value of the sub electronic dial 15 is reduced by one, and interpreted as 2 to the right if it is 3 to the right and 1 to the left if it is 2 to the left. Then, the process returns to (1303) to determine whether or not the AE lock is set. If the AE lock has already been applied, the process does not proceed to (1304), but proceeds to (1307) to correct the exposure correction amount.
[0136]
In (1307), the exposure correction amount is corrected according to the input value of the sub electronic dial 15. When the AE lock is activated by inputting 1 in the sub electronic dial 15 in the plus direction and (1305), when -1 is input here(When the AE lock is applied by one input of the sub electronic dial 15 and another input is performed)Is calculated as 0. Conversely, here, the plus correction is performed only when the plus 1 is input. When the sub-electronic dial 15 is input in the negative direction by one and the AE lock is activated in (1305), if the plus one is input here, it is calculated as zero. Conversely, here, minus correction is performed only when minus 1 is input. In this way, even if the exposure correction amount is 0 and the AE lock is set, if +1 or -1 is input as appropriate, the AE lock is released as described later.
[0137]
In order to release the AE lock, it is determined in step (1308) whether or not the correction result of the exposure correction amount is 0. If the correction result is 0, the flow advances to (1309) to release the AE lock, and at the same time, based on the photometry area. Return is completed. If it is not 0, the process ends with AE lock and exposure correction applied.
[0138]
By using the present embodiment, it is possible to set the exposure correction and the AE lock to one operation by forcibly setting the photometry mode to the partial photometry mode or the spot photometry mode.
[0139]
【The invention's effect】
Claim 1PertainAccording to the invention, the exposure compensation input member isFixing the metering value and setting the exposure compensation amount by simply operating the means for setting the exposure compensation value while operatingAnd the operability of the exposure compensation of the camera is improved.
[0140]
Claim 2PertainAccording to the invention, the exposure compensation input member isBy operating the means for setting the exposure compensation value after the operation, the exposure compensation amount can be set.Thus, the operability of the camera for exposure compensation is improved.
[0141]
According to the third aspect of the present invention, by sequentially operating the means for setting the exposure correction value, the fixing of the photometric value and the exposure correction can be sequentially performed,The operability of the exposure compensation of the camera is improved.
[0142]
According to the fourth aspect of the present invention, when a photometry mode for photometry of a very limited portion of the screen, such as partial photometry or spot photometry, is selected by the photometry mode switching unit, exposure correction is performed.By operating the means for settingExposure compensation while fixing the metering valueamountCan be set.
According to the fifth aspect of the present invention, the fixed state of the photometric value can be released by operating the means for setting the exposure correction, thereby improving the operability of the exposure correction of the camera.
[0143]
According to the invention according to claim 6, an exposure correction value is set when a light metering mode for metering a very limited portion of the screen such as partial light metering or spot light metering is selected by the light metering mode switching means. Since the metering value is fixed by the first operation of the means and the exposure compensation amount is corrected by the subsequent operation,Thus, the operability of the camera for exposure compensation is improved.
[0144]
According to the invention according to claim 7, the light metering mode is forcibly switched to the partial metering or the spot metering by operating the means for setting the exposure metering value, the metering is performed, and the metering value is fixed and the exposure correction value is set. SoThe operability of the exposure compensation of the camera is improved.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a first embodiment.
FIG. 2 is a block diagram of a camera.
FIG. 3 is a flowchart showing a series of operations of the camera.
FIG. 4 is a flowchart showing a second embodiment.
FIG. 5 is a display example of the second embodiment.
FIG. 6 is a display example of the second embodiment.
FIG. 7 is a block diagram of a camera.
FIG. 8 is a flowchart showing a third embodiment.
FIG. 9 is a flowchart showing a third embodiment.
FIG. 10 is a flowchart showing a fourth embodiment.
FIG. 11 is a flowchart showing a fourth embodiment.
FIG. 12 is a flowchart showing a fifth embodiment.
FIG. 13 is a flowchart showing a fifth embodiment.
[Explanation of symbols]
1. Microcomputer 2. Lens control circuit
3: Liquid crystal display circuit 4: Switch sense circuit
5. Strobe flash / dimming control circuit 6. Focus detection circuit
7. Photometry circuit 8. Shutter control circuit
9: motor control circuit 10: first electronic dial
11: external display member 12: internal display member
13: Interchangeable lens 14: External strobe
15: Second electronic dial (sub-electronic dial)

Claims (7)

And exposure compensation input member, means for fixing the photometric value, and means for setting the exposure correction value, the camera and means for controlling the fixed and the exposure correction of the photometric value,
The operation of the prior Symbol exposure correction input member comprises a control means for setting the exposure correction amount by operating the means for setting the exposure compensation input member the exposure correction value remains operated with fixing the photometric value A camera characterized by that. Exposure correction input member, means for fixing the photometric value, means for setting the exposure correction value, and a camera having means for fixing the photometric value and controlling the exposure correction,
A camera comprising a control means for fixing a photometric value and for setting an exposure correction amount by operating a means for setting the exposure correction value in a state where the exposure correction input member is operated . Means for fixing the measuring light values, and means for setting the exposure correction value, the camera and means for controlling the fixed and the exposure correction of the photometric value,
A camera comprising a control means for fixing a photometric value by a first operation of the means for setting the exposure correction value and correcting an exposure correction amount by a subsequent operation . Split photometry, average metering, partial metering, and metering mode switching means spot metering, etc., and means for fixing the photometric value, and means for setting the exposure compensation value, and means for controlling the photometric values fixed and exposure compensation In a camera equipped with
When the metering mode for metering the partial metering or very limited portion of the screen of spot metering or the like is selected by the photometric mode switching means, by operation of the means for setting the exposure compensation, fixing the photometric value And a control means for setting an exposure correction amount . 5. The camera according to claim 4 , further comprising control means for releasing the fixing of the photometric value by setting the exposure correction amount to zero in a state where the photometric value is fixed. Split photometry, average metering, partial metering, and metering mode switching means spot metering, etc., and means for fixing the photometric value, and means for setting the exposure compensation value, and means for controlling the photometric values fixed and exposure compensation In a camera equipped with
When the metering mode for metering the partial metering or very limited portion of the screen of spot metering or the like is selected by the photometric mode switching means, the photometric value in the first-time operation of the means for setting the exposure compensation value And a control means for correcting the exposure correction amount in a subsequent operation . Split photometry, average metering, partial metering, and metering mode switching means spot metering, etc., and means for fixing the photometric value, and means for setting the exposure compensation value, and means for controlling the photometric values fixed and exposure compensation In a camera equipped with
It is characterized by having control means for forcibly switching the metering mode to partial metering or spot metering by operation of the means for setting the exposure correction value and for metering, fixing the metering value and setting the exposure correction value . camera.

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