JPH08242406A - Camera - Google Patents

Abstract

PURPOSE: To improve the operability by fixing photometric value through a series of entry of an input operation member for setting exposure correction, and correcting exposure. CONSTITUTION: Switches SW3-5 are used to select a group of various photometry/exposure modes and to rotate an electronic dial 10 thereby setting a desired mode. When a switch SW6 for setting exposure correction is closed, a microcomputer 1 recognizes the state of the switch SW6 via a switch sense circuit 4, at first conducts AE lock and uses a photometry circuit 7 to make photometry and locks a newest photometric value, and then checks whether or not the electronic dial 10 is rotated by using the switch sense circuit 4, and increases or decreases, corrects the exposure correction amount having been set already depending on the rotating direction. An in-finder liquid crystal display device 12 displays the current exposure correction setting value. If the correction result of the exposure correction amount indicates zero, the AE lock is released and when the correction result of the exposure correction amount indicates other value than zero, the corrected exposure correction amount is stored and the exposure correction setting is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a means for setting exposure compensation and a means for fixing a photometric value (AE lock means) to control the photometric value and control the exposure compensation. is there.

[0002]

2. Description of the Related Art In recent years, the operation of a camera has been programmed and various cameras having various shooting modes have been proposed.

Among such modes, for example, in the program mode, the shutter speed and the aperture value are automatically set according to the program from the photometric value and the like. This setting is
For example, the value is displayed on a display provided on the main body of the camera to show the value to the photographer.

On the other hand, the photographer may want to photograph under various photographing conditions according to his / her preference, and may want to photograph under or over instead of the exposure at the value determined by the photometric member of the camera.

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 operating member provided in the camera body, The index mark moves from the corrected “0” position (hereinafter referred to as an unset position) set at the center position of the display unit to the “+” or “−” side, and the photographer looks at the moving position of the mark. However, the number of correction steps is adjusted to a desired position.

On the other hand, this exposure correction is performed only when the dial operation member provided in the camera body is operated while the exposure correction setting button provided in the camera body is being pressed, and the correction of the correction and the setting to the unset position are performed. The restoration also requires the operation of the dial operation member with the exposure correction setting button being pressed.

[0007]

When shooting with an exposure that suits the photographer's intention, the exposure amount automatically set by the photometric member of the camera may not be satisfactory. There are many demands to use AE lock and exposure compensation at the same time, such as when deciding exposure such as "black is black" and "white in this part is white". In order to realize this requirement, the conventional technique uses two exposure compensation inputs. There is a problem that it is necessary to operate the members and the operability is poor.

The present invention is intended to improve operability. Firstly, setting of AE lock and exposure correction can be realized by a series of operations, and secondly, the setting can be performed by one exposure correction input member. It is intended to be operable.

[0009]

The camera according to claim 1 of the present invention is an exposure correction input member for inputting instruction information, a means for fixing a photometric value, and a means for setting an exposure correction for changing an exposure control value. In a camera provided with a means for fixing the photometric value and controlling the exposure correction, by the input from the exposure correction input member in the state where the exposure correction is not set,
It is characterized by further comprising control means for fixing the photometric value and setting the exposure correction.

According to this structure, the photometric value can be fixed and the exposure can be corrected by a series of inputs of the exposure correction input member, and the operability of the exposure correction of the camera is improved.

A camera according to a second aspect of the present invention is the camera according to the first aspect, further comprising control means for releasing the fixation of the photometric value by an input from the exposure correction input member while the photometric value is fixed. To do.

According to this structure, the exposure correction input member can release the photometric value by a series of inputs from claim 1,
The operability of the exposure compensation of the camera is improved.

The camera of claim 3 of the present invention comprises an exposure correction input member for inputting instruction information, a means for fixing a photometric value, a means for setting an exposure correction for changing an exposure control value,
In a camera having means for fixing a photometric value and controlling exposure compensation, a control for fixing the photometric value at the first input of the exposure compensation input member and correcting the exposure compensation amount at the second and subsequent inputs. It is characterized by having means.

According to this structure, the photometry value can be fixed and the exposure correction can be sequentially performed by sequentially inputting with the same exposure correction input member, and the operability of the exposure correction of the camera is improved.

The camera according to claim 4 of the present invention comprises an exposure correction input member for inputting instruction information, a means for fixing a photometric value, a means for setting an exposure correction for changing an exposure control value,
In a camera equipped with means for fixing the photometric value and controlling the exposure compensation, it is possible to instruct to fix the photometric value, correct the exposure compensation amount, and release the fixation of the photometric value by inputting from one of the exposure compensation input members. It is characterized by having a control means.

According to this structure, the input of one exposure correction input member can fix the photometric value, correct the exposure correction amount, and release the fixation of the photometric value, thereby improving the operability of the exposure correction of the camera.

The camera according to claim 5 of the present invention comprises an exposure correction input member for inputting instruction information, and a photometry mode switching means such as split photometry, average photometry, partial photometry, and spot photometry.
In a camera equipped with a means for fixing the photometric value, a means for setting the exposure compensation for changing the exposure control value, and a means for controlling the fixation of the photometric value and the exposure compensation, When the photometry mode for photometry of a very limited part is selected by the photometry mode switching means, the photometry value is fixed by the input from the exposure compensation input member in a state where the exposure compensation is not set. It is also characterized by having a control means for setting the exposure correction.

According to this construction, the photometric value can be fixed and the exposure can be corrected by a series of inputs of the exposure correction input member according to the selection of the photometric mode, and the operability of the exposure correction of the camera can be improved.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the photometric mode for measuring a very limited portion of the screen, such as partial metering or spot metering, is selected by the metering mode switching means, and the metering value is selected. It is characterized in that it has a control means for releasing the fixation of the photometric value in response to an input from the exposure correction input member in a state where is fixed.

According to this configuration, the exposure correction input member can release the photometry value with a series of inputs from the fifth aspect according to the selection of the photometry mode, and the operability of the exposure correction of the camera is improved.

According to a seventh aspect of the present invention, there is provided an exposure correction input member for inputting instruction information, and a photometry mode switching means such as split photometry, average photometry, partial photometry and spot photometry.
In a camera equipped with a means for fixing the photometric value, a means for setting the exposure compensation for changing the exposure control value, and a means for controlling the fixation of the photometric value and the exposure compensation, When a photometry mode for photometry of a very limited area is selected by the photometry mode switching means, the photometry value is fixed by the first input of the exposure correction input member and the exposure correction is performed by the second and subsequent inputs. It is characterized by having a control means for correcting the quantity.

According to this structure, according to the selection of the photometric mode, the photometric value is fixed and the exposure is sequentially corrected by sequentially inputting the same exposure correction input member, and the operability of the exposure correction of the camera is improved. .

The camera according to claim 8 of the present invention comprises an exposure correction input member for inputting instruction information, and a photometry mode switching means such as split photometry, average photometry, partial photometry and spot photometry.
In a camera equipped with a means for fixing the photometric value, a means for setting the exposure compensation for changing the exposure control value, and a means for controlling the fixation of the photometric value and the exposure compensation, When a photometric mode for photometry of a very limited portion is selected by the photometric mode switching means, the photometric value is fixed and the exposure correction amount is fixed and the photometric value is fixed by input from one of the exposure correction input members. It is characterized by having a control means capable of issuing a cancellation instruction.

According to this structure, in response to the selection of the photometric mode, one exposure correction input member can be input to fix the photometric value, correct the exposure correction amount, and release the fixed photometric value, thereby correcting the exposure of the camera. The operability of is improved.

A camera according to claim 9 of the present invention comprises an exposure correction input member for inputting instruction information, and a photometry mode switching means for division photometry, average photometry, partial photometry, spot photometry and the like.
In a camera that has means for fixing the photometric value, means for setting the exposure compensation to change the exposure control value, and means for fixing the photometric value and controlling the exposure compensation, According to an input from the exposure correction input member, the photometric mode is automatically switched to partial photometry or spot photometry to perform photometry, the photometric value is fixed, and the exposure correction is set.

According to this structure, the measurement mode is forcibly fixed to partial metering or spot metering, the photometric value is fixed by a series of inputs of the exposure compensation input member, and the exposure compensation can be performed. It improves the sex.

The camera according to claim 10 of the present invention is the camera according to claim 9.
In (1), the light metering mode is automatically switched to partial light metering or spot light metering to perform light metering, and the light metering value is fixed, and a control means for releasing the fixation of the light metering value by an input from the exposure correction input member is provided. And

According to this structure, the measurement mode is forcibly fixed to the partial metering or the spot metering, and the exposure correction input member can release the metering value by a series of inputs from claim 9 to correct the exposure of the camera. The operability of is improved.

According to the camera of claim 11 of the present invention, an exposure correction input member for inputting instruction information, divided photometry, average photometry,
It is equipped with means for switching the metering mode such as partial metering and spot metering, means for fixing the metering value, means for setting the exposure compensation to change the exposure control value, and means for fixing the metering value and controlling the exposure compensation. In the camera, the metering mode is automatically switched to partial metering or spot metering at the first input of the exposure compensation input member to perform metering, the metering value is fixed, and the exposure compensation amount is corrected after the second input. It is characterized by having a control means for controlling.

According to this structure, the measurement mode is forcibly fixed to the partial metering or the spot metering, and the same exposure correction input member is used to sequentially input the fixed metering value and the exposure correction, thereby sequentially exposing the camera. The correction operability is improved.

According to a twelfth aspect of the present invention, in the camera, an exposure correction input member for inputting instruction information, divided photometry, average photometry,
It is equipped with means for switching the metering mode such as partial metering and spot metering, means for fixing the metering value, means for setting the exposure compensation to change the exposure control value, and means for fixing the metering value and controlling the exposure compensation. In such a camera, the metering mode is automatically switched to partial metering or spot metering, and one input from the exposure compensation input member gives instructions for fixing the metering value, correcting the exposure compensation amount, and releasing the metering value. It is characterized by having a control means that can be performed.

According to this structure, the measurement mode is forcibly fixed to the partial metering or spot metering, and the exposure metering value is fixed, the exposure compensation amount is corrected, and the metering value is unfixed by inputting one exposure compensation input member. The operability of the exposure compensation of the camera is improved.

[0033]

【Example】

<First Embodiment> FIG. 2 is a block diagram showing electric control of the camera of the present invention. Reference numeral 1 is a microcomputer for controlling the movement of each part of the camera. 2 is
A lens control circuit drives and controls a focus adjusting motor and a diaphragm blade controlling motor of a photographing lens, which will be 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 motor is drive-controlled by the information. At the same time, various information (focal length, etc.) of the lens is sent to the microcomputer 1 by the communication.

Reference numeral 3 is a liquid crystal display circuit for driving a liquid crystal display device for the subsequent operation for notifying the photographer of the remaining battery power of the camera, the number of photographed images, TV value, AV value, exposure correction amount and the like. The liquid crystal display circuit 3 is a microcomputer 1.
Serial communication is performed via DBUS while receiving the DPCOM signal from the. The data of the display content is received by the communication, and the liquid crystal display described later is driven according to the data.

Reference numeral 4 denotes a switch sense circuit, which is a circuit for reading the state of a switch for the photographer to set various photographing conditions and the state of the switch showing the state of the camera and sending it to the microcomputer 1, which receives the SWCOM signal. During this time, the switch data is sent to the microcomputer 1 by serial communication via DBUS. Further, the dial value is counted up / counted down by an input value of an electronic dial described later, and while the SWCOM signal is being received, the count value is sent to the microcomputer 1 by serial communication via DBUS.

Reference numeral 5 is a strobe light emission control circuit,
It is a circuit that controls the flash emission and the emission stop function by TTL dimming. The strobe light emission control circuit 5 is SR
While receiving the COM signal, it serially communicates with the microcomputer 1 via the DBUS to receive data relating to strobe control and perform 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, the microcomputer 1 communicates with the external strobe described later and sends information such as whether or not there is auxiliary light to the microcomputer 1. Conversely, it also plays a role of transmitting a control signal from the microcomputer 1 to an external strobe described later.

A focus detection circuit 6 is composed of a line sensor for performing autofocus by an existing phase difference detection method and a circuit unit for storing and reading the line sensor, which is controlled by the microcomputer 1. . The microcomputer 1 measures the distance with the existing algorithm based on the A / D value of the sensor output,
The lens drive amount is calculated, and the calculated lens drive amount is communicated to the lens control circuit 2 to drive and focus the lens.

Reference numeral 7 denotes a photometric circuit, which measures the subject with a photometric sensor (not shown) divided into a plurality of parts, and sends a photometric output to the microcomputer 1 under the control of the microcomputer 1. The microcomputer 1 A / D converts the sent photometric output, selects the outputs of a plurality of photometric sensors according to the set photometric mode, calculates the brightness with an algorithm according to the photometric mode, and calculates the brightness based on that brightness. To obtain the exposure conditions (aperture, shutter speed).

Reference numeral 8 denotes a shutter control circuit which controls traveling of a shutter front curtain and a rear curtain (not shown) in accordance with a control signal from the microcomputer 1. A feeding motor / charge motor control circuit 9 feeds (winds and rewinds) the film in accordance with a control signal from the microcomputer 1. Also, this motor control circuit is mirror up /
It also controls the charge (mirror down) motor.

SW1 is a first switch for starting the operation of the camera.
When the microcomputer 1 recognizes that the first switch SW1 is turned on, it starts photometry, distance measurement, and display. SW2 is a second switch which is interlocked with the release switch of the camera. When the microcomputer 1 recognizes that the second switch SW2 is turned on, the exposure operation is started.

The X contact is turned on at the timing when the front curtain of the shutter is completed, and serves to inform the strobe light emission control circuit 5 of the strobe light emission timing.

SW3 is a camera mode (TV priority, A
This is a third switch for switching V priority, manual, program, etc.).

Reference numeral 10 is an electronic dial for changing the TV value, the AV value, the photometric mode, and the like. For example, when the electronic dial 10 is rotated while pressing the mode switch of the third switch SW3, TV priority → AV priority →
The order is changed to manual → program → TV priority → AV priority → manual → program, and the mode intended by the photographer can be set. Also, when the electronic dial 10 is rotated in the reverse direction, the program → manual → AV priority → T
The mode is changed in the reverse order of V priority → program →.
If the TV priority is set as the mode by the third switch SW3 and the electronic dial 10, the third priority is set.
The TV value desired by the photographer can be set by turning off the switch SW3 of and turning only the electronic dial 10. If AV priority has already been 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 set the AV desired by the photographer. You can set the value.

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 set. When the electronic dial 10 is rotated without pressing the SW4, the TV value is increased / decreased just by the rotation, and the TV value can be set. The electronic dial 1 is pressed while pressing the fourth switch SW4.
When 0 is rotated, the AV value is increased / decreased just by the rotation, and the AV value can be set.

SW5 is a fifth switch for switching the photometry mode (division photometry, average photometry, partial photometry, spot photometry, etc.). The desired photometric mode is set by rotating the electronic dial 10 while pressing the fifth switch SW5.

SW6 is a sixth switch for setting the exposure correction. Here, the desired correction value is set by rotating the electronic dial 10 while pressing the sixth switch SW6. When the rotation direction of the electronic dial 10 is, for example, a clockwise direction, the correction amount becomes a positive correction and the set amount increases, and when the electronic dial 10 rotates in the opposite direction, the set amount changes in the negative direction.

By the way, in this embodiment, the microcomputer 1 operates so that the photometric value is locked when the sixth switch SW6 for setting the exposure correction is pressed in the situation where the exposure correction is not set.

SW7 is a clear switch, which releases the AE lock when pushed when the AE lock is applied, and sets the exposure correction amount to 0 when pushed when the exposure correction is applied.

Reference numeral 11 denotes an external display device, which is a liquid crystal display circuit 3.
Driven by. Reference numeral 12 denotes a liquid crystal display device in the finder, which is driven by the liquid crystal display circuit 3 like the external display device 11. A replaceable lens 13 is controlled by the lens control circuit 2. An external strobe 14 is controlled by the strobe light emission control circuit 5. This strobe has a power source separate from the camera body.

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.

First, at (300), the power of the camera is turned on due to the fact that the switch of the camera is pressed, etc., and based on the information of the switch sense circuit 4, various modes are switched and various set values are set at (301). Is input, and if there is a change in the switch, the information is transferred to the liquid crystal display circuit 3,
Correct the displayed data.

Whether the first switch SW1 is pressed,
It is judged whether or not it is pressed (302). If it is pressed, the process proceeds to (306) for photometry and distance measurement. If it is not pressed, it is judged whether or not the power is turned off. Proceed to (303) and turn off the power (30
To proceed to 4), to stop the operation, the liquid crystal display circuit 3 turns off the display of unnecessary portions inside or outside the viewfinder of the camera, and the power is turned off. If the power is not turned off, the process returns to the initial (301) switch information input. As a result, if the power of the camera is turned on for some reason, the power is turned on for a certain period of time to check the switch state and switch the display.

If the first switch SW1 is pressed at (302), the process proceeds to (306) and the photometric step (3
In 06), the photometric circuit 7 measures the subject with a plurality of divided photometric sensors, the microcomputer 1 A / D-converts the photometric output, and selects the outputs of the multiple photometric sensors according to the set photometric mode. Then, the brightness is calculated by an algorithm according to the metering mode, and the exposure condition (aperture, shutter speed) is obtained based on the brightness.

In the next step (307) of distance measurement, the focus detection circuit 6 is used to store the data in the line sensor and read it out. Based on the A / D value of the sensor output, the distance is measured by the existing algorithm. After calculating the lens drive amount, the calculated lens drive amount is communicated to the lens control circuit 2 to drive and focus the lens.

At (308), the A set at (306)
The V value and the TV value are displayed on the in-viewfinder liquid crystal display device 12 and the external display device 11 by the liquid crystal display circuit 3. Also,
If the result of the distance measurement in (307) is in-focus, the in-focus display is also performed.

Next, it is judged whether the state of the camera is in a state where the release is permitted (309). For example, AF
If the mode is "one shot mode" (30
If the distance measurement result of 7) is in focus, release is permitted, and the process proceeds to (310) to check the second switch SW2. If not in focus, to (301) to check the switch. Returning to this, when the first switch SW1 is ON, photometry, distance measurement and display are performed again.

When the release is permitted, the second switch S
It is determined whether or not W2 is pressed, and it is determined whether or not to proceed to the subsequent release operation. Second switch SW
When 2 is ON, the process proceeds to (311) to perform the 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.

When the release operation is started, (311)
Then, the feed motor / charge motor control circuit 9 raises the mirror, and the lens control circuit 2 communicates the aperture amount determined in (306) to the lens 13 to perform the aperture operation so as to obtain the set exposure amount. To do.

Next, in (312), the shutter control circuit 8 is used to control the traveling of the shutter front curtain and rear curtain (not shown) so that the TV amount determined in (306) can be obtained.

Further, in (313), the feed motor / charge motor control circuit 9 lowers the mirror and at the same time charges the shutter, and in (306) the lens control circuit 2 communicates with the lens 13 to narrow down. Return the aperture to the full aperture.

Finally, in (314), the microcomputer 1 is used by using the feed motor / charge motor control circuit 9.
The film is wound according to the control signal from
Return to (301).

Next, this embodiment will be described with reference to the flow chart of FIG. The flow chart of FIG. 1 shows a part of the operation of the switch input and display in step 301 of FIG.

First, in (101), it is determined whether or not the sixth switch SW6 for setting the exposure correction is pressed. If not, the process proceeds to (109) and the exposure correction is not set. When the sixth switch SW6 is pressed, before setting the exposure correction, it is judged whether or not the AE lock is applied in order to apply the AE lock in advance (103).

When it is determined that the AE lock is not applied, the AE lock is applied in (104). If the photometry has not been performed, the photometry is performed and the photometric value is locked. Also,
If the metering has already been performed, lock the latest metering value. If the AE lock is already applied, the process directly proceeds to the next step (105).

At (105), whether or not the exposure correction value has been input by the electronic dial 10, that is, the electronic dial 10
It is determined whether or not has rotated, and if it has not been input, the setting is not performed and the process directly proceeds to (109). When the exposure correction value is input (106), the exposure correction amount is increased or decreased to the already set correction amount according to the value of the electronic dial 10.

In (107), 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. If the exposure correction amount is 0, (10
Proceed to 8) to release the AE lock, and if it is not 0, with the AE lock applied and exposure compensation set at the same time (1
09).

At (109), the clear switch SW7
It is determined whether or not is pressed. If it is not pressed, the process ends, and if it is pressed, (110)
Then, the exposure correction amount is set to 0 at the same time when the AE lock is released.

By using this embodiment described above, it is possible to set the exposure correction while the AE lock is applied, and it is possible to quickly set the exposure that matches the image of the photographer.

<Second Embodiment> In the above first embodiment, the embodiment using the clear switch SW7 has been described, but in the present embodiment, an example in which the clear switch SW7 is not used is shown in the flow chart of FIG. Will be described.

At (401), it is determined whether or not the sixth switch SW6 for setting the exposure correction is pressed. If not, the exposure correction is not set and the process ends.
If the sixth switch SW6 is pressed, (40
In 3), 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 has rotated. If not, the process ends. When the exposure correction value is input, the process proceeds to the next (404).

In order to set the exposure correction while the AE lock is set, it is judged in (404) whether or not the AE lock is already set. If the AE lock is not set, it is still in the step (405). If the photometry has not been performed, the photometry is performed and the photometric value is locked. If the metering has already been performed, the latest metering value is locked, the value entered on the electronic dial 10 is decremented by 1, and if it is 3 to the right, it is interpreted as 2 to the right and if it is 2 to the left, it is interpreted as 1 to the left, and again ( Returning to step 401), it is judged whether or not the AE lock is applied.

If the AE lock is already applied,
In order to perform the exposure correction (406), the exposure correction amount is corrected according to the value of the electronic dial 10. When 1 is input to the electronic dial 10 in the plus direction and AE lock is applied at (405), if minus 1 is input here, it is calculated as 0. On the contrary, the positive correction is performed only when the plus 1 is input here. When the electronic dial is input by 1 in the minus direction and the AE lock is applied at (405), when the plus 1 is input, it is calculated as 0. vice versa,
Here, the minus correction is not performed until the minus 1 is input.

In order to determine whether or not to release the AE lock, it is determined in (407) whether or not the correction result of the exposure correction amount is 0. If it is 0, the AE lock is released in (408). And finish. If not 0, AE lock,
Finishes with exposure compensation applied.

The above operation will be described with reference to display examples in the viewfinder shown in FIGS. In the figure, 501 is an AE lock mark displayed when the AE lock is applied,
Reference numeral 502 indicates a shutter speed value, 503 an aperture value, and 504 an exposure correction amount. First, the process of setting the exposure correction to the positive side and then returning the exposure correction amount to 0 and releasing the AE lock will be described with reference to FIG. In the present embodiment, the exposure mode is set to F5.6 with the aperture priority.

FIG. 5A is a display before pressing the electronic dial 10 while pressing the sixth switch SW6, the exposure correction amount is zero, and the AE lock is not applied.

From FIG. 5A to FIG. 5B, the one-step electronic dial 10 is input to the plus side while pressing the sixth switch SW6.

In FIG. 5B, the AE lock is applied and the AE lock mark 501 is displayed. The locked photometric value is 1/500 at the shutter speed with respect to the aperture F5.6.

From FIG. 5 (b) to FIG. 5 (c), the one-step electronic dial 10 is further input to the plus side while pressing the sixth switch SW6.

FIG. 5C shows how the value locked in FIG. 5B has been subjected to exposure correction of plus 0.5 steps. With the exposure correction of plus 0.5 steps applied, the shutter speed was 1/500, which was 1/350, a half step later.

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.

FIG. 5 (d) shows that the value of FIG. 5 (c) is further subjected to exposure correction of plus 0.5 step. In other words, it means that the exposure correction of the first stage is applied. Since the exposure was corrected by plus 1.0 steps, 1/500 was shuttered at 1/250, which was 1 step slower.

From FIG. 5D to FIG. 5E, the one-step electronic dial 10 is input to the minus side while pressing the sixth switch SW6.

FIG. 5 (e) shows that the value of FIG. 5 (d) has been subjected to exposure correction of minus 0.5 steps. In other words, a total of +0.5 step exposure correction has been applied. Therefore, the shutter speed was 1/350.

While pushing the sixth switch SW6 from FIG. 5 (e) to FIG. 5 (f), the one-step electronic dial 10 is further input to the minus side.

FIG. 5 (f) shows that the value of FIG. 5 (e) is further subjected to exposure correction of minus 0.5 step. In other words, the total correction amount was 0, and the exposure correction was released and the AE lock was released at the same time. Then, as the AE lock mark 501 disappeared, and as a result of seeing a slightly brighter area than when the AE lock of FIG. 5B was applied, the shutter speed changed from 1/500 to 1/1000.

Next, using FIG. 6, AE lock is applied,
An example in which the AE lock is released before exposure compensation is applied will be described.

FIG. 6A shows a display before pressing the electronic dial 10 while pressing the sixth switch SW6, the exposure correction amount is 0, and the AE lock is not applied.

From FIG. 6A to FIG. 6B, the one-step electronic dial 10 is input to the plus side while pressing the sixth switch SW6.

In FIG. 6B, the AE lock is applied and the AE lock mark 501 is displayed. The locked photometric value is 1/500 at the shutter speed with respect to the aperture F5.6.

From FIG. 6B to FIG. 6C, the one-step electronic dial 10 is input to the minus side while pressing the sixth switch SW6.

FIG. 6C shows that the electronic dial 10 is rotated in the opposite direction to the direction in which the AE lock is applied in FIG. 6B. In other words, the total correction amount was 0, and the exposure correction was released and the AE lock was released at the same time. Therefore, as a result of seeing the AE lock mark 501 disappearing and a little darker than when the AE lock of FIG.
It changed from 500 to 1/125.

By using this embodiment described above, the AE lock can be applied or released by the same operation as the exposure compensation operation, so that the exposure suitable for the photographer's drawing can be set quickly. Is possible. In addition, operability is improved because it is not necessary to perform various operations.

<Third Embodiment> In the above-described embodiments, the case where one electronic dial is provided and the electronic dial is rotated while pressing the sixth switch SW6 for setting the exposure correction has been described. In this embodiment, a case will be described in which two electronic dials are provided and one electronic dial is used only for the exposure correction input.

FIG. 7 is a block diagram showing electric control of the camera of this embodiment, in which fifteen second electronic dials are added to the electric control block diagram of FIG. Here, the second electronic dial 15 is expressed as the sub electronic dial 15.

Here, the sub electronic dial 15 is a dedicated electronic dial for inputting the exposure correction, and the features of this embodiment are the AE lock function and the correction operation of the exposure correction amount by the sub electronic dial 15 described below.

This embodiment will be described with reference to FIGS. 8 and 9.

First, referring to FIG. 8, the sub electronic dial 1
A description will be given of an example in which the exposure correction is performed by one step at the same time as the AE lock by one input of No. 5, and then the AE lock is applied by the one input to the sub electronic dial 15 and the exposure correction is performed by one step by the other input with reference to FIG. An example will be described.

The flow chart of FIG. 8 will be described.

First, in order to determine whether or not to perform exposure compensation, it is determined in (801) whether or not the exposure compensation value has been input by the sub electronic dial 15, that is, whether or not the electronic dial has rotated, and it has been input. If there is not, it ends as it is. If it has been input, the process proceeds to AE lock determination.

In order to apply the AE lock, A in (803)
If it is determined whether or not the E-lock is applied, and if it is determined that the AE-lock is not applied, the photometry is performed at (804) and the value is locked if the photometry has not been performed. If the metering has already been performed, the latest metering value is locked. If the AE lock is already applied, the process does not proceed to (804) but proceeds to the correction of the exposure correction amount in (805).

In the correction of the exposure correction amount in (805), the correction amount is increased or decreased in accordance with the value of the input sub electronic dial 15 with respect to the correction amount already set.

Next, in order to judge whether or not the AE lock is released (806), it is judged whether or not the correction result of the exposure correction amount is 0. If it is 0, the AE is judged in (807).
Unlock and exit. If it is not 0, the process ends with the AE lock and exposure correction applied.

Next, the flow chart of FIG. 9 will be described.

First, in order to determine whether or not to perform exposure correction, it is determined in (901) 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 rotated, and the input has been made. If there is not, it ends as it is. If it has been input, the process proceeds to AE lock determination.

In order to apply the AE lock, A at (903)
Determine if E-lock is already applied,
If the AE lock is not applied (904), if the photometry has not been performed yet, the photometry is performed and the value is locked.
If the metering has already been performed, the latest metering value is locked. Next, proceeding to (905), in order to correct the count value by the amount required for the AE lock, the value of the input sub electronic dial 15 is decreased by 1 and if the value is 3 to the right, the value is 2 to the right; if the value is 2 to the left, the value is 1 to the left. And returns to (903) again to return to the determination as to whether or not the AE lock is applied. Already AE
If it is locked, the process proceeds to (906) to correct the exposure correction amount.

At (906), the exposure correction amount is corrected according to the input value of the sub electronic dial 15. When 1 is input in the sub electronic dial 15 in the plus direction and the AE lock is applied in (904), when minus 1 is input here, it is calculated as 0. On the contrary, the positive correction is performed only when the plus 1 is input here. When 1 is input to the sub electronic dial 15 in the minus direction and the AE lock is applied at (904), when plus 1 is input here, 0 is calculated. On the contrary, the minus correction is not performed until the minus 1 is input here. By doing so, even if the exposure correction amount is 0 and the AE lock is applied, if a plus 1 or a minus 1 is appropriately input, as will be described later, A
E-lock is released.

In order to release the AE lock, it is judged in (907) whether or not the correction result of the exposure correction amount is 0, and if it is 0, the flow advances to (908) to release the AE lock and finish. If it is not 0, the process ends with the AE lock and exposure correction applied.

By using this 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 suited to the photographing intention. Operability is greatly improved. In addition, it is less likely that a photo opportunity will be missed in the sense that it is not necessary to operate a plurality of operation members.

<Fourth Embodiment> In the present embodiment, only when the photometry mode is set to the mode (partial photometry or spot photometry) for measuring a limited area, the AE lock described above is used. An embodiment for executing one operation of exposure compensation setting will be described.

This embodiment will be described with reference to FIGS. 10 and 11.

First, referring to FIG. 10, a description will be given of an example in which exposure compensation is performed by one step at the same time as AE lock with one input of the sub electronic dial 15, and then with reference to FIG. An example will be described in which lock is applied and exposure correction is performed by one step with another input.

The flow chart of FIG. 10 will be described.

First, in order to determine whether or not to perform the exposure correction, it is determined in (1001) 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 rotated, and the value has been input. If there is not, it ends as it is. If it has been input, the process proceeds to (1003) to determine the metering mode.

In order to change the correspondence depending on the photometry mode, (1
In 003), it is determined whether the metering mode is set to a mode such as partial metering or spot metering that limits light metering to a very limited range, and partial metering or spot metering If it is set, the operation proceeds to (1005) to perform the AE lock operation. However, if the mode for metering a wide range such as average metering or split metering is set, the AE lock is applied on the sub electronic dial 15. Instead, the process proceeds to (1004) to apply the exposure correction, 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 the process ends.

Since the AE lock is applied, it is determined in (1005) whether the AE lock is applied or not. If it is determined that the AE lock is not applied, the metering is not performed in (1006). If not, photometry is performed and the photometric value is locked. If the metering has already been performed, the latest metering value is locked. If the AE lock is already on, proceed from (1005) to (100
Proceed to 7) to correct the exposure compensation amount.

In the correction of the exposure correction amount of (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.

Next, in order to determine whether or not to release the AE lock, the correction result of the exposure correction amount is 0 in (1008).
If it is 0, it is (100
In 9), release the AE lock and finish. A if not 0
The procedure ends with E-lock and exposure compensation applied.

Next, the flow chart of FIG. 11 will be described.

First, in order to determine whether or not to perform the exposure correction, it is determined in (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 rotated, and the input is made. If not, end as it is. If entered, (1103)
Proceed to the metering mode determination.

In order to change the correspondence depending on the photometry mode, (1
In 103), it is determined whether the metering mode is set to a mode such as partial metering or spot metering, and it is determined whether partial metering or spot metering is available. If it is set, the operation proceeds to (1105) to perform the AE lock operation. However, if the mode for metering a wide range such as average metering or split metering is set, the AE lock is applied on the sub electronic dial 15. Instead, the process proceeds to (1104) to apply 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 the process ends.

Since the AE lock is applied, it is determined in (1105) whether the AE lock is already applied. If it is determined that the AE lock is not applied (1106)
Then, if the photometry has not been performed yet, the photometry is performed and the value is locked. If the metering has already been performed, the latest metering value is locked. Next, proceeding to (1107), in order to correct the count value by the amount required for the AE lock, the value of the input sub electronic dial 15 is decreased by 1, and if the value is 3 to the right, the value is 2 to the right, and if the value is 2 to the left, it is 1 to the left. Interpret and again (110
Returning to 5), it is determined whether or not the AE lock is applied. If the AE lock is already on (110
The process does not proceed to 6) but proceeds to (1108) to correct the exposure correction amount.

At (1108), the sub electronic dial 15
The exposure correction amount is corrected according to the input value of. Input 1 to the sub electronic dial 15 in the plus direction and press A at (1106).
When E-lock is applied, if minus 1 is input here, it is calculated as 0. On the contrary, the positive correction is performed only when the plus 1 is input here. Also, enter 1 in the minus direction on the sub electronic dial 15 and press (1106) to
When E-lock is applied, if a plus 1 is input here, it is calculated as 0. On the contrary, the minus correction is not performed until the minus 1 is input here. By doing so, even when the exposure correction amount is 0 and the AE lock is applied, the AE lock is released as will be described later by appropriately inputting plus 1 or minus 1.

To release the AE lock, (1109)
It is determined whether or not the correction result of the exposure correction amount is 0. If it is 0, the process proceeds to (1110) to release the AE lock and end. If it is not 0, the process ends with the AE lock and exposure correction applied.

By using the present embodiment, it becomes possible to set the exposure correction in consideration of the photometric mode and the AE lock in one operation, and the operability according to the idea of the photometric mode is improved.

<Fifth Embodiment> In this embodiment, when one operation of AE lock and exposure correction setting is executed, the metering mode is forcibly measured in a limited area (partial metering, spot metering). ) Will be described.

This embodiment will be described with reference to FIGS. 12 and 13.

First, with reference to FIG. 12, an example will be described in which exposure compensation is performed by one step at the same time as AE lock with one input of the sub electronic dial 15, and then with reference to FIG. 13, AE is performed with one input of the sub electronic dial 15. An example will be described in which lock is applied and exposure correction is performed by one step with another input.

The flow chart of FIG. 12 will be described.

First, in order to determine whether or not to perform exposure correction, it is determined in (1201) 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 rotated, and the value has been input. If there is not, it ends as it is. If it is input, A of (1203)
Go to E-Lock.

Since the AE lock is applied, it is determined in (1203) whether the AE lock is applied or not. If it is determined that the AE lock is not applied, the partial metering or spot measurement is performed in (1204). The mode is switched to the metering mode for metering a very limited range such as metering, and metering is performed (1205), and the value measured by AE is locked. If the AE lock is already on (120
The process does not proceed to 4) but proceeds to the correction of the exposure correction amount in (1206).

In the correction of the exposure correction amount of (1206), the correction amount is increased or decreased to the already set correction amount according to the input value of the sub electronic dial 15.

Next, in order to determine whether or not to release the AE lock, it is determined in (1207) whether or not the correction result of the exposure correction amount is 0, and if it is 0, (120
At 8), release the AE lock and at the same time return to the original metering area and finish. If it is not 0, the process ends with AE lock and exposure compensation.

Next, the flow chart of FIG. 13 will be described.

First, in order to determine whether or not to perform exposure correction, it is determined in (1301) 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 rotated, and the value has been input. If there is not, it ends as it is. If it has been input, the process proceeds to (1303) AE lock determination.

Since the AE lock is applied, it is determined in (1303) whether the AE lock is already applied. If the AE lock is not applied yet, (130
In 4), switch to a metering mode that measures light in a very limited range, such as partial metering or spot metering, and perform metering (13
AE lock the value measured in 05). Then (13
In order to correct the count value by the amount required for AE lock in 06), the value of the input sub electronic dial 15 is decreased by 1 and interpreted as 2 to the right for 3 to the right and 1 to the left for 2 to the left, and again. Returning to (1303), it is determined whether or not the AE lock is applied. If the AE lock is already applied, the process does not proceed to (1304) but proceeds to (1307) to correct the exposure correction amount.

At (1307), the sub electronic dial 15
The exposure correction amount is corrected according to the input value of. Input 1 to the sub electronic dial 15 in the plus direction and press (1305) to A
When E-lock is applied, if minus 1 is input here, it is calculated as 0. On the contrary, the positive correction is performed only when the plus 1 is input here. Also, input 1 in the minus direction on the sub electronic dial 15 and press (1305) to A
When E-lock is applied, if a plus 1 is input here, it is calculated as 0. On the contrary, the minus correction is not performed until the minus 1 is input here. By doing so, even when the exposure correction amount is 0 and the AE lock is applied, the AE lock is released as will be described later by appropriately inputting plus 1 or minus 1.

To release the AE lock, (1308)
It is determined whether or not the correction result of the exposure correction amount is 0. If it is 0, the process proceeds to (1309) to release the AE lock and at the same time return to the photometric area and finish. 0
If not, the procedure ends with the AE lock and exposure compensation being applied.

By using this embodiment, it is possible to set the exposure correction setting in which the photometry mode is forcibly set to the partial photometry mode or the spot photometry mode and to make the AE lock one operation.

[0139]

According to the first aspect of the present invention, the photometric value can be fixed and the exposure can be corrected by a series of inputs of the exposure correction input member, and the operability of the exposure correction of the camera can be improved.

According to the second aspect of the present invention, the exposure correction input member can release the photometric value by a series of inputs from the first aspect, and the operability of the exposure correction of the camera is improved.

According to the third aspect of the present invention, by successively inputting with the same exposure correction input member, the fixed photometric value and the exposure correction can be sequentially performed, and the operability of the exposure correction of the camera is improved.

According to the fourth aspect of the invention, by inputting one exposure correction input member, the photometric value can be fixed, the exposure correction amount can be corrected, and the photometric value can be released. Will get better.

According to the fifth aspect of the invention, according to the selection of the photometric mode, the photometric value can be fixed and the exposure can be compensated by a series of inputs of the exposure compensation input member, and the operability of the exposure compensation of the camera can be improved. Get better.

According to the invention described in claim 6, in accordance with the selection of the photometric mode, the exposure correction input member is used.
The metering value can be canceled with a series of input from, and the operability of the exposure compensation of the camera is improved.

According to the seventh aspect of the present invention, in accordance with the selection of the photometric mode, the photometric value can be fixed and the exposure can be corrected sequentially by sequentially inputting with the same exposure correction input member. Operability is improved.

According to the eighth aspect of the present invention, in response to selection of the photometric mode, one exposure correction input member can be used to fix the photometric value, correct the exposure correction amount, and release the fixed photometric value. , The operability of the exposure compensation of the camera is improved.

According to the invention described in claim 9, the measurement mode is forcibly fixed to the partial metering or the spot metering, the metering value is fixed by a series of inputs of the exposure compensation input member, and the exposure compensation can be performed. The operability of exposure compensation is improved.

According to the tenth aspect of the invention, the measurement mode is forcibly fixed to the partial metering or the spot metering,
With the exposure compensation input member, the photometric value can be canceled by a series of inputs from claim 9, and the operability of the exposure compensation of the camera is improved.

According to the invention of claim 11, the measurement mode is forcibly fixed to the partial metering or the spot metering,
By sequentially inputting with the same exposure correction input member, the fixed photometric value and the exposure correction can be sequentially performed, and the operability of the exposure correction of the camera is improved.

According to the twelfth aspect of the present invention, the measurement mode is forcibly fixed to partial metering or spot metering,
By inputting one exposure correction input member, the photometry value can be fixed, the exposure correction amount can be corrected, and the fixation of the photometry value can be released, which improves the operability of the exposure correction of the camera.

[Brief description of drawings]

FIG. 1 is a flow chart 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 flow chart 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: Block diagram of 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]

DESCRIPTION OF SYMBOLS 1 ... Microcomputer 2 ... Lens control circuit 3 ... Liquid crystal display circuit 4 ... Switch sense circuit 5 ... Strobe light emission / dimming control circuit 6 ... Focus detection circuit 7 ... Photometric circuit 8 ... Shutter control circuit 9 ... Motor control circuit 10 ... No. 1 electronic dial 11 ... external display member 12 ... internal display member 13 ... interchangeable lens 14 ... external strobe 15 ... second electronic dial (sub-electronic dial)

Claims (12)

[Claims] 1. An exposure correction input member for inputting instruction information, means for fixing a photometric value, means for setting an exposure correction for changing an exposure control value, and means for fixing a photometric value and controlling exposure correction. A camera comprising: a camera having a control means for fixing the photometric value and setting the exposure correction by an input from the exposure correction input member when the exposure correction is not set. 2. The camera according to claim 1, further comprising control means for releasing the fixation of the photometric value by an input from the exposure correction input member while the photometric value is fixed. 3. An exposure correction input member for inputting instruction information, a means for fixing a photometric value, a means for setting an exposure correction for changing an exposure control value, and a means for fixing a photometric value and controlling exposure correction. And a control means for fixing the photometric value at the first input of the exposure correction input member and correcting the exposure correction amount at the second and subsequent inputs. 4. An exposure correction input member for inputting instruction information, means for fixing a photometric value, means for setting exposure correction for changing an exposure control value, and means for fixing a photometric value and controlling exposure correction. And a control means capable of instructing fixation of a photometric value, correction of an exposure compensation amount, and cancellation of fixation of a photometric value by an input from one of the exposure compensation input members. 5. An exposure compensation input member for inputting instruction information, a photometry mode switching means such as split photometry, average photometry, partial photometry and spot photometry, and means for fixing the photometry value.
For cameras equipped with means for setting the exposure compensation that changes the exposure control value and means for fixing the exposure metering value and controlling the exposure compensation, measure only a very limited part of the screen such as partial or spot metering. When the photometric mode to be selected is selected by the photometric mode switching means, the control means for fixing the photometric value and setting the exposure correction by the input from the exposure correction input member in a state where the exposure correction is not set. A camera characterized by having. 6. The metering mode switching means selects a metering mode for metering a very limited portion of the screen, such as partial metering or spot metering, according to claim 5.
A camera having a control means for releasing the fixation of the photometric value in response to an input from the exposure correction input member in a state where the photometric value is fixed. 7. An exposure correction input member for inputting instruction information, a photometric mode switching means such as split photometry, average photometry, partial photometry, spot photometry, and means for fixing the photometric value.
For cameras equipped with means for setting the exposure compensation that changes the exposure control value and means for fixing the exposure metering value and controlling the exposure compensation, measure only a very limited part of the screen such as partial or spot metering. When the photometric mode to be selected is selected by the photometric mode switching means, the photometric value is fixed at the first input of the exposure correction input member, and the exposure correction amount is corrected at the second and subsequent inputs. A camera characterized by that. 8. An exposure correction input member for inputting instruction information, a photometric mode switching means such as split photometry, average photometry, partial photometry and spot photometry, and means for fixing the photometric value.
For cameras equipped with means for setting the exposure compensation that changes the exposure control value and means for fixing the exposure metering value and controlling the exposure compensation, measure only a very limited part of the screen such as partial or spot metering. When a photometric mode to be selected is selected by the photometric mode switching means, control means capable of instructing fixation of the photometric value, correction of the exposure correction amount, and release of fixation of the photometric value by input from one of the exposure correction input members. A camera characterized by having. 9. An exposure correction input member for inputting instruction information, a photometry mode switching means such as split photometry, average photometry, partial photometry, and spot photometry, and means for fixing the photometry value.
In a camera equipped with means for setting the exposure compensation for changing the exposure control value and means for fixing the photometric value and controlling the exposure compensation, the exposure compensation input member from the exposure compensation input member in the state where the exposure compensation is not set. A camera characterized in that it has a control means for automatically switching the light measurement mode to partial light measurement or spot light measurement in response to input to perform light measurement, fixing the light measurement value and setting exposure correction. 10. The metering mode according to claim 9, wherein the metering mode is automatically switched to partial metering or spot metering to perform metering, and the metering value is fixed, and the metering value is fixed by an input from the exposure correction input member. A camera having control means for controlling. 11. An exposure compensation input member for inputting instruction information, a photometry mode switching means such as split photometry, average photometry, partial photometry, and spot photometry, and means for fixing the photometry value.
In a camera provided with a means for setting an exposure compensation for changing an exposure control value and a means for fixing a photometric value and controlling the exposure compensation, the metering mode is partially selected by the first input from the exposure compensation input member. A camera having a control means for automatically switching to photometry or spot photometry to perform photometry, fixing the photometry value, and correcting the exposure correction amount after the second input. 12. An exposure correction input member for inputting instruction information, a photometric mode switching means such as split photometry, average photometry, partial photometry and spot photometry, and means for fixing the photometric value.
In a camera equipped with means for setting the exposure compensation that changes the exposure control value and means for fixing the photometric value and controlling the exposure compensation, the metering mode is automatically switched to partial metering or spot metering and A camera having control means capable of instructing fixing of a photometric value, correction of an exposure correction amount, and release of fixation of a photometric value by input from one of the exposure correction input members.