JP2002090814A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the troubles that conventionally electronic image of a monitor is made dark and is hard to view and the labor and time are taken before photographing, because the changeover of a screen image by a switch operation is needed, when photographing the image of under-exposure and in a film camera provided having an optical finder and the monitor. SOLUTION: A moving subject image is observed as an optical image from an eyepiece 9 as a first observation mode, and the electronic image as a still subject image by an image pickup part 11 is shown on a monitor part 12, provided at the inside of a finder and is guided to the eyepiece 9. A finder mirror 14 is provided in front of the eyepiece 9, and the changeover from the optical image to the electronic image, including an effect according to the change in an exposure factor is performed for a prescribed period, when a switch for changing the exposure factor (shutter speed, a diaphragm or the like) prior to the photographing is carried out.

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 finder which can confirm an optical image formed by a photographing lens and an electronic image generated by an image pickup device by switching, and particularly to a camera having a finder in which photographing conditions are changed. The present invention relates to a camera capable of confirming an effect on an optical image as an electronic image before photographing.

[0002]

2. Description of the Related Art Generally, a digital camera is provided with an electronic viewfinder (monitor unit) using a liquid crystal display element. Since the monitor displays the photographed image (electronic image), the monitor has the convenience that the photographed photograph can be confirmed on the spot. For this convenience, many technologies for mounting a monitor unit on a normal film camera have been proposed. For example, JP-A-60-1
In Japanese Patent No. 90077, the film is controlled based on photographing information such as exposure time of the film, film sensitivity, and aperture value of a photographing lens, and is displayed on a monitor in accordance with a value calculated based on the photographing information. A technique for changing an image is disclosed. Also, JP-A-6-110107
In Japanese Unexamined Patent Application Publication No. H11-260, the continuous shooting mode and the single shooting mode are selectively switched, and when the single shooting mode is selected, the shot still image is displayed. In the continuous shooting mode, a moving image is displayed during shooting. There has been disclosed a technique in which a still image is displayed by operation after photographing is completed.

[0003]

However, in the technology described in Japanese Patent Application Laid-Open No. 60-190077, for example, when taking an underexposed photograph, the image displayed on the monitor has a dark screen. However, the expression of the subject becomes difficult to see. Furthermore, since the monitor is provided on the back of the camera, for example, when the surroundings are extremely bright, such as under direct sunlight on a beach or a ski resort,
The monitor is difficult to see and difficult to see.

In the technique described in Japanese Patent Application Laid-Open No. H06-110107, an image is displayed by operating a preview switch on a monitor provided on the back of the camera. Therefore, in order to confirm an image on a monitor before actually taking an image, a switch operation for switching is necessary, and a time-consuming operation must be performed before the image is taken. For this reason, when the subject is a moving object, there is a possibility that a photo opportunity may be missed.

Therefore, according to the present invention, while observing a subject with a clear viewfinder that is easy to see without being affected by the surrounding brightness, a change in an image when an exposure factor such as an aperture or a shutter speed is changed remains unchanged while looking through the viewfinder. It is an object of the present invention to provide a camera that can be checked before shooting.

[0006]

In order to achieve the above object, the present invention provides a first observation mode for optically observing a subject image and a second observation mode for observing the subject image as an electronic image. , A viewfinder that can be observed by switching between them, switch means for changing the exposure factor of the camera, and an image which can be observed by the viewfinder for a predetermined time when the switch means is operated, from the first observation mode. A selection means for selectively switching to a second observation mode.

In the second observation mode, the electronic image including the effect of the exposure factor changed in accordance with the operation of the switch means is generated. The effect of the exposure factor changed in accordance with the operation of the switch means is based on a change in the exposure or image blur state in the shutter speed, aperture control, photometry mode. The image generated in the second observation mode is
It is a still image.

In the camera having the above-described configuration, in the first observation mode, a dynamic subject image can be observed as an optical image.
In the second observation mode, an electronic image generated from a static subject image by photoelectric conversion can be observed, and when the exposure factor of the camera is changed by operating the switch unit, the selection unit is guided to the viewfinder. For a predetermined time,
Switching from the optical image to the electronic image, an electronic image including an effect corresponding to the change in the exposure factor is displayed in the viewfinder.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a conceptual configuration of a single-lens reflex camera to which a function of switching an observation image of a finder between an optical image and an electronic image is applied as an embodiment of the camera of the present invention. In this camera, a taking lens 1 and an aperture mechanism 2 are arranged in a lens barrel,
A movable mirror 3 rotatable around one end 3a, a focal plane shutter 7 and a silver halide film 6 are sequentially disposed behind the movable mirror 3. Above the movable mirror 3, a focusing screen 4, a focusing plate 5 and a pentarhythm 8 are arranged, and an eyepiece 9 of a finder is provided behind the focusing screen 4.

A finder mirror 14 that rotates about a rotation shaft 14a is provided between the pentarhythm 8 and the eyepiece 9, and an image forming lens 10 and a CCD
An image pickup unit 11 is provided, and a monitor unit 12 including a liquid crystal display element or the like is provided below the image pickup unit 11.
Further, an actuator 15 for rotating the finder mirror 14 and a control unit (CPU) 20 for controlling the operation of the actuator 15 and the imaging unit 11 and the monitor unit 12
And an operation switch 16 for suggesting switching of the observation image of the finder. The switching of the observation image is performed by rotating the finder mirror 14 to switch the observation optical path from the photographing lens and the monitor image optical path from the monitor element.

In the camera constructed as described above, the light flux of the subject image passes through the photographing lens 1 and the aperture mechanism 2 and is reflected upward by the movable mirror 3 to form an image on the focusing screen 4 so that the photographer 13 By looking through the eyepiece 9, the user can observe a subject image (referred to as an optical image) on the focusing screen 4 via the pentarhythm 8 and the focusing plate 5. The split image 4a is arranged in the center of the focusing screen 4, in a region of about 1% in terms of area ratio. Also,
The range other than the split image 4a is a normal mat surface, and if the subject is out of focus, the subject image is blurred. If the subject is focused, a clear subject image can be observed. If the photographer adjusts the focus of the photographing lens 1 so as to eliminate the shift between the two images in the split image, the subject can be appropriately focused.

When a release button (not shown) is operated, the movable mirror 3 rotates about the rotation shaft 3a and retracts out of the photographing optical path, and the focal plane shutter 7 opens for a set time. The silver salt film 6 is exposed. When the exposure operation is completed, the movable mirror 3 moves down again to guide the subject image light beam to the finder optical system.
During normal object observation, the finder mirror 14 is retracted outside the observation optical path, that is, upward in the drawing.

When the photographer 13 wants to take a picture with a more special effect, he operates the operation switch 16. By this operation, the actuator 15 is driven based on the control of the CPU 20, and the finder mirror 14 is moved from the observation optical path to the outside of the optical path, that is, into the optical path of an image (electronic image) by the monitor unit 12. When the finder mirror 14 is in the observation optical path, the observation image light flux emitted from the pentaprism 8 is reflected upward in the drawing of FIG. 1 and is imaged on the imaging surface of the imaging unit 11 by the imaging lens 10. . The imaging unit 11 captures an image on the focusing screen 4 and generates an electronic image (including data). The captured electronic image is displayed on a monitor unit 12 including a liquid crystal display element or the like, and is displayed on a finder mirror 14.
Is reflected by the back surface of the lens 13 and guided to the eyepiece 9 and enters the eye of the user 13.

Next, the above-described imaging unit 11 and monitor unit 1
2 will be described with reference to the configuration example shown in FIG. 2 and the flowchart shown in FIG. The imaging unit 11 includes an imaging element 17 and an image processing circuit 18, and an image generated by the image processing circuit is output to the monitor unit 12 as an image signal. Further, a switch which is a part of the CPU 20 to which the operation switch 16 is connected and an image change input circuit 22 are connected to the image processing circuit 18.

The image processing circuit 18 has a function of controlling each operation of image pickup, image processing and display, and receives a detection signal indicating that the operation switch 16 has been operated from the switch and image change input circuit 22. Then, the routine shifts from the stopped state to the operating state, and the routine shown in FIG. 3 is started. That is, when the photographer operates the operation switch 16, the finder mirror 14 advances into the observation optical path as described above, while the operation state is determined by the switch and the image change input circuit 2.
2 is detected. The detection result is output to the image processing circuit 18 in the imaging unit 11 as a switch detection signal.

First, the image processing circuit 18 sends an imaging start instruction signal for starting the imaging operation to the imaging device 17 (step S1). Then, it waits for an imaging completion signal from the imaging device 17 (step S2). Upon receiving the signal, reads an image signal, performs analog / digital conversion (A / D conversion), and creates digital image data (step S3). . Subsequently, a process of converting the digital image data into a form suitable for display is performed (Step S).
4) The digital image data is sent to the monitor unit 12, and a display instruction signal is sent, displayed as an electronic image for a predetermined time (step S5), and the process returns.

That is, according to the flowchart for explaining the switching operation in the finder display shown in FIG. 4, when the normal finder mirror 14 is in the up state (optical finder), the optical image formed by the photographing lens is displayed. It can be viewed as a moving image (step S1
1). When the photographing mode switching operation is performed by the operation switch 16 (step S12), the finder mirror 14 is set to the down state (electronic viewfinder) (step S13), and the effect emphasized still image (electronic image) by the monitor unit 12 is displayed. Can be seen (step S1
4). After a lapse of a predetermined time (step S15),
The operation returns to the normal up state of the viewfinder mirror 14 (step S16).

The photographing mode is set to +1.5 as photographing condition setting which is often adopted in a compact camera.
EV exposure correction and the like are known, but in this embodiment,
The photographing condition setting for a single-lens reflex camera will be described.

This camera will be described with reference to FIGS.

For example, in photographing a backlight scene as shown in the optical image of FIG. 5A, a target mark provided in the viewfinder is superimposed on a person in a situation where the person becomes black due to backlight. The user 13 operates the operation switch (spot metering button) 16 as shown in FIG.
By this operation, an image of a photographed image in which a person has been properly exposed and the background has been overexposed as shown in the electronic image of FIG. 5B is generated as an electronic image, displayed on the monitor unit 12, and displayed in the viewfinder. Can be seen through.

When the user 13 operates the spot metering button 16 prior to photographing, such an electronic image is generated, and the user can know the image to be photographed. This effect is achieved by setting the reflectivity of an object existing in the limited spot area in the target mark to 18% and setting the automatic exposure (shutter speed,
(Combination of apertures), but photography cannot be performed using a conventional optical viewfinder.

An arithmetic control unit (a CPU shown in FIG. 1) comprising a one-chip microcomputer or the like for controlling display of such a camera.
The sequence according to 20) will be described with reference to the flowchart shown in FIG.

It is detected whether or not the release button 31 has been pressed by the user 13 (step S21). If the release button 31 has been pressed (YES), the operation shifts to the control of the aperture 2 and the mirror 3 and the shooting operation by controlling the shutter. (Step S
22). However, when the release button 31 is not pressed (NO), it is determined whether or not the operation switch 16 such as the spot metering button is operated (step S2).
3) If operated (YES), an electronic image to which the effect of spot metering has been exerted is generated, and the routine shifts to a switching routine instead of an optical image. First, the finder mirror is moved. In order to show the generated electronic image to the user 13, the finder mirror 1 is
4 is lowered (step S24). Due to this down, the optical path of the optical image is moved upward, the optical image is taken into the image sensor 17, the image processing circuit 18 performs image processing according to the effect of the operated switch, and displays the electronic image on the monitor unit 12 (step). S25). With this display,
When the user 13 looks into the finder, the finder mirror 14
An electronic image is projected on the back side of the camera and can be confirmed.

When the predetermined time has elapsed (step S26), the actuator 15 is driven to move up the finder mirror 14 (step S27), and at the same time, the display of the monitor unit 12 is turned off (step S28).
To return. After this, the user becomes a normal optical finder, and the user can concentrate on photographing while watching an optical image that becomes a moving image like a conventional camera. In order to avoid missing a photo opportunity, pressing the release button 31 immediately shifts to a release operation and takes a picture even within a predetermined time for displaying an electronic image.

If the operation switch 16 operated in step S23 is a spot metering button, image processing is performed so that the spot metering target mark provided at the center of the viewfinder screen has an appropriate exposure. Display an electronic image. As a result, the effect of spot metering can be clearly understood. In addition, the user operates the aperture switching ring 32 and the shutter speed switching ring 33 provided on the camera 30 as shown in FIG.
The voltage division level of the variable resistor 34 shown in FIG. 2 is monitored by the A / D conversion circuit 35 and the like, an image obtained by the operation is captured as an electronic image, and the effect is displayed on the monitor unit 12 with its effect emphasized. May be. For example, in the aperture-priority exposure control mode, the user wants to enjoy the effect of changing the depth of field according to the aperture, so that the electronic image may be displayed according to the flowchart shown in FIG. 8 so that the effect of the aperture can be easily understood. .

In the aperture priority exposure control mode, when the user operates the aperture switching ring 32 (step S3).
1) The finder mirror 14 is lowered by the actuator 15 (step S32). Then, the image is taken into the image sensor 17 (step S33), and the image processing circuit 1
Image processing is performed on the monitor unit 12 so as to obtain an appropriate exposure based on the aperture amount by operating the aperture switching ring 32, and the electronic image is displayed on the monitor unit 12 (step S34). If the predetermined time has elapsed (step S35). Thereafter, the actuator 15 is driven to raise the finder mirror 14 (step S36), and at the same time, the display of the monitor unit 12 is turned off (step S37), and the process returns. The image may be captured into the image sensor 11 after the aperture switching ring 32 is stopped down to the operated aperture value.

As another aperture-priority exposure control mode, a flowchart shown in FIG. 9 may be used. First, when the user operates the aperture switching ring 32 (step S41), the finder mirror 14 is lowered by the actuator 15 (step S42). Then, an image before aperture stop as shown in FIG. 10A is taken into the image sensor 17 (step S43), and then an aperture stop image as shown in FIG. (Step S44).

Next, in the image processing circuit 18, these captured images are compared to generate an electronic image in which a change point is subjected to edge enhancement processing (step S45), and further image processing is performed so as to obtain an appropriate exposure. Monitor unit 12
Then, an electronic image as shown in FIG. 10C is displayed (step S46). The person 41 in the composition shown in FIG. 10C has little change because the subject is in focus, and the standing tree 42 and the mountain 43 serving as the background have a large image change before and after the stop. Therefore, the change point is the background tree 4
2 and peaks 43, and edge emphasis processing is performed on these. Then, if the predetermined time has elapsed (step S
47), the actuator 15 is driven to raise the finder mirror 14 (step S48), and the display on the monitor unit 12 is turned off (step S49), and the process returns.

As described above, if each image before and after the aperture operation is captured by the image sensor, subjected to edge enhancement processing and appropriate exposure processing by comparison, and reproduced as an electronic image, FIG.
As shown in (c), a portion (here, a standing tree) that is changed by the aperture operation is specified. Based on this, the user may determine whether to blur or imprint the tree. That is, the standing tree is blurred in the direction in which the aperture is opened, and both the standing tree and the person are clearly photographed in the direction in which the aperture is opened. Therefore, according to the present embodiment, the user can clearly know the effect of the aperture by checking the electronic image before shooting.

Next, referring to a flowchart shown in FIG. 11, in the exposure control mode in which the shutter speed is prioritized,
A method of displaying a prediction of an effect when the shutter speed is switched will be described. In this mode, the exposure time is shortened or lengthened to aim at an effect of stopping or blurring a moving image. First, when the user operates the shutter speed switching ring 33 (Step S
51), the finder mirror 14 is lowered by the actuator 15 (step S52). Then, the first image (t = 0) is captured by the image sensor 17 (step S5).
3) After a predetermined time (t = tx) corresponding to the shutter speed (SS) time, the second image is taken into the image sensor 17 (step S54).

The image processing circuit 18 compares these images to extract a changed portion (step S5).
5) Generate a composite electronic image in which only the changed portion is superimposed on one of the images and display it on the monitor unit 12 (step S56). When the predetermined time has elapsed (step S57), the actuator 15 is driven to move the finder mirror 14 up (step S5).
8) At the same time, the display of the monitor unit 12 is turned off (step S59), and the process returns. As an example, FIG.
The first image (t = 0) shown in FIG. 12A is captured, and then, for example, the second image shown in FIG.
May be captured and the degree of blurring may be displayed. As the degree of blur, the two images may be simply displayed in an overlapping manner, or a part that has changed by comparison may be determined and emphasized. FIG. 12C shows the monitor image thus obtained. For example, if you try this operation with your child before running at a sports day before taking a picture, you can check the effect and then take a picture with few failures.

As for the timing of the first image and the second image, two images are input at short time intervals when the shutter speed (SS) is fast, and two images are captured at long time intervals when the shutter speed (SS) is slow. As a result, when the shutter speed is fast, the subject image appears to stop, and when the shutter speed is slow, the change in the position of the subject image remains on the monitor screen. It is possible to shoot effectively. Therefore, in the present embodiment, when the shutter speed is prioritized, it is possible to enjoy photographing after grasping the effect by an electronic image before photographing.

Referring to the flowchart shown in FIG.
The photographing or finder display of the camera described in the above embodiment will be described.

First, it is determined whether or not the release button has been pressed (step S61).
S), the process shifts to a photographing operation by controlling the aperture 2 and the mirror up and controlling the shutter (step S62). However, when the release button 31 is not pressed (NO),
It is determined whether or not the shutter speed switching ring 33 has been operated (step S63), and if it has been operated (YE
S), the process shifts to the above-described exposure control mode in which the shutter speed is prioritized, and an electronic image with a blurring effect is displayed (step S64). On the other hand, if the shutter speed switching ring 33 has not been operated (NO), it is determined whether or not the user has operated the aperture switching ring 32 (step S).
65).

If the aperture switching ring 32 has been operated in this determination (YES), the operation shifts to the above-described aperture-priority exposure control mode, and an electronic image with the effect of blurring by the aperture is displayed (step S66). . On the other hand, if the aperture switching ring 32 has not been operated (NO), it is determined whether or not the spot metering button has been operated (step S67). If the button has been operated (YES), the mode shifts to the spot metering mode described above. Then, the electronic image to which the effect of the spot metering has been exerted is displayed (step S68).

Next, after each electronic image is displayed, it is determined whether a predetermined time has elapsed or a release button (first release) has been pressed (step S69). If the release switch is pressed (YES), the actuator 15
Is driven to raise the finder mirror 14 (step S71), and the display of the monitor unit 12 is turned off (step S72), and the process returns to step S61.

As described above, by operating each switch, an electronic image may be generated which emphasizes a changing portion of the image in the exposure control mode in which the shutter speed is prioritized, the exposure control mode in which the aperture is prioritized, and the spot metering mode. Alternatively, in the photometric mode, an electronic image in which a portion serving as a reference for the brightness of the exposure is simply switched may be generated and displayed. By displaying the effect using the electronic image, the user can sufficiently predict the quality of the captured image. According to each embodiment described above, the photometry mode in the camera,
When changing exposure factors related to exposure control, such as aperture and shutter speed, with a switch, the user can use the switch to change his or her own intentions, such as exposure and image blur, during shooting, as an electronic image in the viewfinder before shooting. The displayed information stimulates the creativity of the photographer, and the desired effect can be obtained.

In the above-described embodiment, the electronic image to which the effects of the operation of the photographing factors such as the aperture and the shutter speed are added before photographing is switched from the optical image into the finder so that the electronic image can be observed for a predetermined time. It is also possible to easily use an existing rewritable memory or to provide a dedicated rewritable memory so as to project an electronic image substantially equivalent to that taken after shooting.
In this case, after the exposure to the film is completed, the finder mirror is lowered to take in the electronic image, and the electronic image including the effect of the photographing factor can be confirmed in the finder immediately after photographing. This is a display method similar to that of a general digital camera, but has an effect that it can be confirmed immediately after shooting in a viewfinder in a film camera.

Although the above embodiments have been described, the present invention includes the following inventions.

(1) A camera having a finder capable of switching between a first observation mode for optically observing a subject image and a second observation mode for observing the subject image as an electronic image. A camera comprising: switch means for changing a factor; and selecting means for selectively switching from the first observation mode to the second observation mode for a predetermined time when the switch is operated.

(2) The second observation mode is characterized in that the processing method of the electronic image is switched according to the change of the exposure factor by the switch means.

(3) The image change is a change in exposure due to shutter speed, aperture control, photometry mode, or a change in image blur state. (4) The second mode is a still image. Features.

(5) A camera having display means for comparing electronic images before and after an aperture operation and highlighting a portion that changes depending on the aperture.

(6) A camera that takes in an electronic image twice at a changed timing according to a set shutter speed, and combines and displays the two images.

(7) An optical viewfinder for observing, as an optical image, a dynamic subject image formed on the focusing screen and projected on the focusing screen, and a static subject by photoelectric conversion from the subject image projected on the focusing screen. A photoelectric conversion element that generates a subject image signal, a monitor that displays an electronic image based on a static subject image signal output by the photoelectric conversion element, and is disposed in the viewfinder;
A switching unit provided in the optical viewfinder for switching between the optical image and the electronic image to the eyepiece lens, a switch for changing an exposure factor of the camera, and generating the electronic image and controlling the entire configuration. And an electronic image including an effect corresponding to the change of the exposure factor under the control of the control unit when the exposure factor of the camera is changed by operating the switch before photographing. A camera wherein the switching unit switches from the optical image to the electronic image and displays the electronic image in a viewfinder.

[0046]

As described above in detail, according to the present invention, when an exposure factor such as an aperture or a shutter speed is changed while observing a subject with a clear viewfinder which is easy to see without being affected by the surrounding brightness. It is possible to provide a camera capable of confirming a change in an image before photographing while looking through a viewfinder.

[Brief description of the drawings]

FIG. 1 is a view showing a conceptual configuration of a single-lens reflex camera to which a function of switching an observation image of a finder between an optical image and an electronic image is applied as an embodiment of the camera of the present invention.

FIG. 2 is a diagram illustrating a specific configuration example of an imaging unit and a monitor unit according to the first embodiment.

FIG. 3 is a flowchart for explaining the operation of the configuration example shown in FIG. 2;

FIG. 4 is a flowchart for explaining a switching operation in a viewfinder display of the camera.

FIG. 5 is a diagram showing an example of an optical image and an electronic image of a backlight scene by the camera of the embodiment.

FIG. 6 is a diagram illustrating a shooting state of the camera of the embodiment.

FIG. 7 is a flowchart for explaining display control in the camera of the embodiment.

FIG. 8 is a flowchart illustrating a screen switching operation in an aperture priority exposure control mode.

FIG. 9 is a flowchart for describing a screen switching operation in another aperture priority exposure control mode.

FIG. 10 is a diagram for explaining an example of generation of an electronic image when a photographing factor in an aperture is changed.

FIG. 11 is a flowchart illustrating a screen switching operation in an exposure control mode in which shutter speed is prioritized.

FIG. 12 is a diagram for describing an example of generation of an electronic image when a photographing factor at a shutter speed is changed.

FIG. 13 is a flowchart for explaining photographing or finder display by the camera described in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Shooting lens 2 ... Aperture mechanism 3 ... Movable mirror 4 ... Focusing screen 5 ... Focusing plate 6 ... Silver halide film 7 ... Focal plane shutter 8 ... Penta rhythm 9 ... Eyepiece lens 10 ... Imaging lens 11 ... Image pickup unit 12 ... Monitor Unit 13: Photographer 14: Finder mirror 14a: Rotating shaft 15: Actuator 16: Operation switch 17: Image sensor 18: Image processing circuit 20: Control unit (CPU)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoji Watanabe 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industrial Co., Ltd. F-term (reference) 2H018 AA21 AA32 2H054 AA01 CD03 2H102 AB11 BA12 BA25 BB08 CA34

Claims (4)

[Claims] 1. A viewfinder that can switch between a first observation mode for optically observing a subject image and a second observation mode for observing the subject image as an electronic image, and a camera exposure factor. Switch means for performing a change operation; and selecting means for selectively switching an image observable by the finder from the first observation mode to the second observation mode for a predetermined time when the switch means is operated. A camera comprising: 2. The camera according to claim 1, wherein the second observation mode generates the electronic image including an effect of an exposure factor changed according to an operation of the switch unit. 3. The effect of the exposure factor changed according to the operation of the switch means includes shutter speed, aperture control,
The camera according to claim 2, wherein the camera is based on a change in an exposure or an image blur state in a photometry mode. 4. The camera according to claim 1, wherein the image generated in the second observation mode is a still image.