JP2004109831A - Optical equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it is difficult to excellently perform the detection of a focus state corresponding to each photographing state and the observation of a photographed image in the case of performing moving image and still image photographing by using a common photographing optical system and image pickup element. <P>SOLUTION: At the time of the still image photographing, a movable mirror is positioned in a photographing optical path, the focus state is detected by a first focus state detection means and an optical image from the photographing optical system is led to an observation side by an optical finder. In the moving image photographing, the movable mirror is positioned outside the optical path, the focus state is detected by a second focus state detection means and the image is displayed by a display element. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical device such as a digital camera capable of both moving image shooting and still image shooting.
[0002]
[Prior art]
In recent years, an image of a subject guided by a photographing optical system such as a photographing lens is formed on an image sensor, and an obtained electric image signal is recorded as digital still image data on a recording medium, while a digital moving image is recorded. 2. Description of the Related Art A compact digital still camera, which also has a function of recording data on a recording medium, is widely used. These digital still cameras have a focus state detection method used to perform automatic focus adjustment, a method of measuring the distance to the object using an infrared sensor, and a focusing state based on the contrast of the object image formed on the light receiving element. Is adopted, and when the contrast detection method is used, an image pickup element on which a subject image is formed is also used as a light receiving element for focus detection.
[0003]
As another focus state detection method, there is a phase difference detection method applied to a single-lens reflex camera. The phase difference detection method is a focus detection method excellent in responsiveness that can detect the direction of defocus as well as the focusing state of a subject image.
[0004]
As a camera capable of performing both moving image shooting and still image shooting, there has been proposed a compound camera having a plurality of focus state detecting means, shooting a moving image with an image sensor, and shooting a still image on a silver halide film (Patent Document 1) 1). In this camera, when one focus state detecting means is switched to the other focus state detecting means, the next detection is performed with reference to the result of the focus state detection position by the focus state detecting means before the switching, so that the camera after the switching is performed. The detection can be performed quickly, and the light flux of the subject is distributed using a fixed half mirror, and the distributed light flux is guided to a portion having each focus state detection unit.
[0005]
In addition, recent digital still cameras use an optical viewfinder that optically constitutes a viewfinder as a structure for confirming the imaging range, and display images captured by the imaging device using a liquid crystal display device. There is known an electronic viewfinder configured as described above, or a configuration configured as a liquid crystal display monitor on the back of the camera. The optical viewfinder includes a perspective viewfinder (a viewfinder that observes an optical image with an optical axis different from the optical axis of the shooting optical system) and a single-lens reflex type viewfinder (a viewfinder that observes an optical image from the shooting optical system). In the case of a perspective viewfinder, the imaging range can be roughly checked with a viewfinder usually employed in a compact digital still camera. The single-lens reflex finder has a finder optical system configured to visually recognize an optical image guided by a photographing optical system and a quick return mirror.
[0006]
In addition, in order to reduce power consumption in a digital camera, an object to be observed by one finder optical system is obtained based on an optical image obtained by an imaging optical system and image data obtained by imaging with an image sensor such as a CCD. There has been proposed a camera having a configuration in which a finder image switching unit is provided to selectively switch between a display image on a display element and a finder image switching unit (see Patent Document 2).
[0007]
[Patent Document 1]
JP-A-10-39196
[Patent Document 2]
JP-A-10-294888
[0008]
[Problems to be solved by the invention]
As described above, a single-lens reflex digital still camera employs an optical finder having a quick return mirror configuration for observing an optical image formed by an imaging optical system. This configuration has a feature that a subject light beam that has passed through the imaging optical system can be directly observed by looking into the optical viewfinder, so that a still image in an intended imaging range can be captured without missing a photo opportunity. Since the quick return mirror must be retracted from the optical axis of the photographing optical system while the subject image is being formed, there is a problem that the photographing range during photographing cannot be confirmed. Here, when the subject image is photographed as a still image, since the time for exposing the subject image to the image sensor is relatively short, even if it is not possible to confirm the photographing range during the photographing time, the photographing range does not greatly deviate from the intended photographing range. Did not.
[0009]
However, in a single-lens reflex digital still camera having such a finder configuration, when a moving image shooting function is provided in addition to a still image shooting function, the shooting range of a moving subject is checked. The inability to shoot a long moving image is a significant problem. Here, when using a single-lens reflex digital camera capable of shooting a moving image having a viewfinder switchable finder proposed in Patent Document 2, the shooting range can be confirmed even when shooting a moving image. However, this is to reduce power consumption. Therefore, the subject confirmation means based on the display image of the display element is limited to the one performed through the finder optical system. For this reason, there is a problem that the photographing range cannot be confirmed without always looking into the viewfinder even when photographing a moving image for a long time, and a burden is imposed on the photographer.
[0010]
An object of the present invention is to provide an optical device capable of detecting an optimum focus state in still image shooting and moving image shooting, and capable of favorably observing an image shot in still image shooting and moving image shooting. The purpose is.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, an optical apparatus according to the present invention includes an imaging optical system that forms a subject image, an imaging element that captures an optical image from the imaging optical system, and an optical device that is disposed in an optical path of the imaging optical system. A movable mirror movable between a first position to be set and a second position disposed outside the optical path of the photographing optical system, first focus state detection means, and second focus state detection means. An optical device, wherein when the movable mirror is located at the first position, the focus state is detected by the first focus state detection means, and when the movable mirror is located at the second position. The focus state is detected by the second focus state detection means.
[0012]
Further, the optical apparatus of the present invention is an optical apparatus that performs moving image shooting and still image shooting using a common shooting optical system and an image sensor, and a first position disposed in an optical path of the shooting optical system. A movable mirror movable to a second position disposed outside the optical path of the photographing optical system, a first focus state detection unit, and a second focus state detection unit. In this case, the movable mirror is positioned at the first position, and the focus state is detected by the first focus state detecting means. When moving images are taken, the movable mirror is positioned at the second position. The focus state is detected by the second focus state detection means.
[0013]
Further, the optical apparatus of the present invention is an optical apparatus that performs moving image shooting and still image shooting using a common shooting optical system and an image sensor, and a display element that displays an image based on an output from the image sensor. An optical finder for guiding an optical image from the photographing optical system to an observation side, a first position arranged in an optical path of the photographing optical system, and a second position arranged outside the optical path of the photographing optical system. A movable mirror, a first focus state detection unit, and a second focus state detection unit. When taking a still image, the movable mirror is positioned at the first position and the second mirror is positioned at the first position. The focus state is detected by the first focus state detecting means, and the optical image from the photographing optical system is guided to the observation side by the optical finder, and at the time of moving image photographing, the movable mirror is positioned at the second position. Detecting the second focus state Performs detection of the focus state by stage, is characterized by displaying an image by the display device.
[0014]
Here, the first focus detection means is a phase difference detection method. Further, the second focus detection means is a contrast detection method of performing focus detection based on the contrast of a subject image picked up by the image pickup device. In this case, at the time of capturing a moving image, the movable mirror is held at the second position, and an image is captured by the image sensor. Further, moving image shooting is performed with the movable mirror held at the second position, and after stopping the moving image shooting, the state where the movable mirror is held at the second position is continued or the movable mirror is moved to the first position. Is selectively switched to move to the position.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
(1st Embodiment)
FIG. 1 is a cross-sectional view schematically illustrating a mechanical portion of a single-lens reflex digital camera capable of capturing a still image and a moving image according to a first embodiment of the optical apparatus of the present invention.
[0017]
In FIG. 1, reference numeral 1 denotes a camera (digital camera), and 2 denotes a photographing optical system provided integrally with the camera 1. In the present embodiment, an interchangeable lens type camera (digital camera) including a camera and an interchangeable lens (photographing optical system) detachably attached to the camera by mount connection may be used. As described above, the camera 1 has the photographing optical system 2 composed of a plurality of lenses and the like for forming an image of a subject, and the photographing optical system 2 uses the light to form a subject image at a predetermined position. A focusing lens 3 which is a focus adjusting optical system for adjusting a focus by moving in a direction along an axis; an actuator 3a such as a motor for driving the focusing lens 3 to move in the optical axis direction; The aperture member 4 is configured to adjust the light amount of the subject light flux passing through the lens. 5 is a fixed lens.
[0018]
In the camera 1, a part of the region is formed by a half mirror behind the photographing optical system 2, and is located on the optical path of the subject light beam. A movable main mirror 6 that can be divided into a light beam for detection and that allows the light beam of the subject to pass by retracting out of the optical path of the light beam of the subject is rotatably arranged. At a predetermined position on the back side of the main mirror 6, a sub-mirror 7 for guiding the subject light flux transmitted through the half mirror portion of the main mirror 6 to the focus detection side is provided rotatably with respect to the main mirror 6. Have been.
[0019]
The main mirror 6 is configured to rotate about a shaft between a position indicated by a solid line and a position indicated by a dotted line in FIG. The sub-mirror 7 is arranged at a predetermined position corresponding to the position of the main mirror 6 following the rotation of the main mirror 6 (the state shown in the optical path shown in FIG. 1 and the state shown in FIG. 4). The sub-mirror 7 is positioned when the sub-mirror 7 is located outside the optical path together with the mirror.)
[0020]
When the main mirror 6 is at the position shown by the solid line in FIG. 1, a part of the subject light beam that has passed through the photographing optical system is guided to the finder optical system by the total reflection surface of the main mirror 6, and the remaining light beam is used as the main light beam. The light passes through the half mirror section of the mirror 6 and is guided to the focus detection optical system side (focus state detection section 13) by the total reflection surface of the sub mirror 7.
[0021]
In the camera 1, a CCD, CMOS, or the like is provided at a position behind the main mirror 6 and at an image forming plane on which a subject image formed by the subject light flux transmitted through the photographing optical system 2 is formed. An image sensor 8 is arranged.
[0022]
The camera 1 has, as a shutter function, an electronic shutter capable of adjusting the time for exposing the subject image by the image sensor 8 by electric control, and the time for exposing the subject image to the image sensor 8 by a mechanical mechanism. And a mechanical shutter 9 that operates. The mechanical shutter 9 is disposed between the main mirror 6 and the imaging device 8.
[0023]
In the camera 1, an optical system having a pentaprism 10 at a predetermined position above the main mirror 6 for observing an optical image of a subject formed by the photographing optical system 2 is provided as a means for checking a subject image at the time of photographing. An expression finder 11 is provided, and a liquid crystal panel 12 capable of displaying an image formed on the image sensor 8 is provided on the rear surface of the main body of the camera 1. The configuration is such that the subject image observation means can be switched between a case where a still image is taken and a case where a moving image is taken.
[0024]
In the camera 1, as a first focus state detecting means, a subject light beam reflected by the sub-mirror 7 of the main mirror 6 is divided into two light beams, and an image plane position formed by each of these light beams is formed. A focus state detection unit 13 of a phase difference detection method for detecting a focus state by observing a difference is provided, and the above-described image sensor 8 is provided as second focus state detection means. The imaging device 8 has a focus state detection function of a contrast detection method that captures an optical image from the above-described imaging optical system 2 and performs focus detection based on the sharpness of a subject image captured by the imaging device 8. I have. Then, the detection output of the focus state from the focus state detection unit 13 or the imaging element 8 is output to a control circuit (not shown), and the control circuit drives the actuator 3a in the photographing optical system 2 to drive the focusing lens 3. Then the focus state is adjusted. Each of the above focus detection methods uses a phase difference detection type focus state detection unit 13 when performing a still image shooting, and uses a contrast type imaging device 8 when performing a moving image shooting. The focus detection method can be switched according to the condition. It is difficult to quickly detect the focus state by the contrast method using the imaging device 8, but it is difficult to determine the image resolution per frame more strictly for a moving image than for a still image. A slight defocus due to the delay is often acceptable.
[0025]
FIG. 2 is a rear perspective view of the camera shown in FIG. On the upper surface of the camera 1, there is provided a release button 14 which is pressed during photographing. Also, on the back of the camera 1, a shooting mode selector 15 for selecting one of a moving image shooting mode (VIDEO), a still image shooting mode (PHOTO), and a playback mode (PLAY), and an aperture priority shooting mode (Av) And an exposure mode selector 16 for selecting an exposure mode at the time of shooting, such as a shutter speed priority shooting mode (Tv), a manual shooting mode (M), and a program mode (P). Note that reference numeral 11 denotes the above-described optical finder, and reference numeral 12 denotes the above-described liquid crystal panel.
[0026]
Next, with reference to the flowchart of FIG. 3 and FIGS. 1 and 2, the flow of the operation of the camera of the first embodiment when taking a still image will be described.
[0027]
When the still image photographing mode is selected by the photographing mode selector 15, the subject light beam passing through the photographing optical system 2 passes through the half mirror portion of the main mirror 6 while the main mirror 6 is maintained at the position indicated by the solid line in FIG. The transmitted light is guided to the sub-mirror 7 and is reflected by the main mirror 6 to be split into a light flux that forms an upright inverted image at a conjugate position with the imaging surface of the imaging device 8. After the erect inverse image formed by one of the split light beams (light beam reflected by the main mirror 6) passes through the pentaprism 10 and is corrected to an erect image, it is guided to the finder optical system 11, The user can confirm the erect image as a subject image actually captured by the photographing optical system. The other light beam that has reached the sub-mirror 7 is reflected by the sub-mirror 7 and then guided to the focus state detection unit 13.
[0028]
When half-pressing of the release button 14 is detected (step (# in the figure) 301), the focus state is detected by the phase difference detection method based on the light beam guided to the focus state detection unit 13, and the focus state is detected. The actuator 3a is driven by the control of a control circuit (not shown) based on the detection result to move the focusing lens 3 in the direction along the optical axis, so that the subject image formed on the image sensor 8 is in the focused state. It is adjusted to become. At this time, the brightness of the luminous flux transmitted through the photographing optical system 2 is measured by a photometry sensor (not shown), and an aperture value and a shutter speed capable of obtaining an appropriate exposure state according to the exposure mode set by the exposure mode selector 16. Exposure conditions such as are determined (step 302).
[0029]
Subsequently, when the full press of the release button 14 is detected (step 303), the main mirror 6 is rotated upward and retracted from the optical path of the photographing optical system 2. Thereafter, the diaphragm 4 is stopped down to a predetermined aperture value, and the mechanical shutter 9 is fully opened (step 304), so that the subject image formed by the photographing optical system 2 is captured by the image sensor 8, and the still image data is shown in the figure. It is recorded on the omitted image storage medium (step 305). Thereafter, the mechanical shutter 9 is fully closed, the aperture 4 is also opened, and the main mirror 6 is returned to a position located in the optical path (step 306), and the photographing is completed.
[0030]
Next, with reference to the schematic diagram of FIG. 4 and the flowchart of FIG. 5, the flow of operation when capturing a moving image in the camera of the first embodiment will be described.
Taking a case where the moving image shooting mode is selected by the shooting mode selector 15 and the aperture priority shooting mode is selected by the exposure mode selector 16 as an example, the user first checks the subject with the optical viewfinder 11 and asks for a shooting opportunity. Thereafter, when full release of the release button 14 is detected (step (# in the figure) 501), the mechanical shutter 9 is fully opened, the aperture 4 is stopped down to a position arbitrarily set by the user, and passes through the photographing optical system 2. The main mirror 6 is rotated to a position retracted from the optical path of the subject luminous flux (step 502). At this time, the luminous flux to the optical finder 11 is blocked, and the luminous flux of the subject that has passed through the photographing optical system 2 is directly formed on the image pickup device 8. The image data is converted into image data, and the image data for each frame is sequentially read out at predetermined time intervals (step 503). At the same time, the focusing lens 3 is slightly moved back and forth in the optical axis direction by the actuator 3a, and the sharpness of the subject image is increased from a plurality of image data as the subject image obtained by the imaging device 8. Is detected, the focusing lens 3 is driven in this direction, and the focusing lens 3 is positioned at the point where the sharpness of the image data becomes highest (focus matching). Thereby, the subject image formed on the image sensor 8 is adjusted to a focused state. At this time, photometry is performed based on image data corresponding to the subject image read from the image sensor 8, and a shutter speed capable of obtaining an appropriate exposure state is determined according to the brightness of the subject, and a time corresponding to the shutter speed is determined. Only the electronic shutter is turned on to adjust the charge accumulation time in the image sensor 8 (step 504). At the same time, a subject image is displayed on the liquid crystal panel 12 as a moving image based on the image data photoelectrically converted by the image sensor 8 (step 505). By observing the liquid crystal panel 12, the user can perform photographing while confirming the subject image actually photographed by the photographing optical system 2. Simultaneously with the operations of steps 503 to 505, the image data photoelectrically converted by the image sensor 8 is sequentially recorded as a moving image on a recording medium (not shown) for each frame (step 506). When the release of the release button 14 is no longer detected (step 507), the recording of the moving image is stopped (step 508), the mechanical shutter 9 is fully closed, the aperture 4 is opened, and the main mirror 6 is moved to the photographing optical system. (Step 509).
[0031]
In the above-described moving image shooting, when the shooting environment is dark, for example, a shutter speed that is inappropriate for a preset number of frames per second in the moving image shooting (for example, a shutter speed for obtaining an appropriate exposure is required to be 1 / frame number [sec] or more). Case) In the case where an exposure time is required, a control for maintaining an appropriate exposure state by increasing the imaging sensitivity of the image sensor 8 or opening the aperture 4 to the open side is omitted in the drawing. This is performed by the control circuit.
[0032]
Further, in the first embodiment, the case where the release button is fully pressed while the moving image is being shot has been described. However, when the moving image shooting is started, the release button is fully pressed once to start the moving image shooting. When the release button is stopped, the full-press operation of the release button may be performed again, so that it is not necessary to continue the full-press state of the release button.
[0033]
(Second embodiment)
Next, a second embodiment of the optical apparatus of the present invention will be described.
[0034]
FIG. 6 is a perspective view from the back of the camera for explaining the second embodiment, and FIG. 7 is a flowchart for explaining the operation of the second embodiment. Note that the camera of this embodiment has the same components as the camera of FIG. 1 described for the first embodiment, and components common to the camera of FIG. 1 will be described with the same reference numerals.
[0035]
In this embodiment, the main mirror 6 is kept out of the optical path of the light beam of the subject so that the moving image can be promptly resumed when the release button is fully pressed again after stopping the moving image shooting, or A description will now be given of a case in which it is possible to select whether to return to a state located on the optical path of the luminous flux of the subject so that a still image can be taken.
[0036]
In the first embodiment, the shooting mode is switched by the shooting mode selector. On the other hand, in the camera of the present embodiment, as shown in FIG. 6, a release button (VIDEO) 602 dedicated to moving image shooting and a still image shooting It has a dedicated release button (PHOTO) 601 and one release lock 603 that disables those buttons and also has a role of a power switch, and switches the shooting mode when the release buttons 601 and 602 are operating. Configuration. The release buttons 601 and 602 function as switches for switching a shooting mode, and also function as switches for instructing start of shooting. In the second embodiment, the configuration other than the release lock unit and the release unit is the same as that of the first embodiment.
[0037]
Next, a flow of operations in capturing a moving image and a still image in the camera according to the second embodiment will be described with reference to a flowchart of FIG. 7 and FIG.
[0038]
When moving image shooting is to be performed from the power-off state, the release lock 603 is first released (step (# in the figure) 701), and then, when the full-press of the moving image release button 602 is detected (step 702). Activate as a moving image shooting mode and prepare for moving image shooting. In the case where the exposure mode selector is set to the aperture priority shooting mode (Av), for example, the mechanical shutter 9 is first fully opened, and the aperture 4 is stopped down to a position arbitrarily set by the user. The subject is rotated so as to retreat from the optical path of the subject light beam that has passed through the optical system 2 (step 703). At this time, the luminous flux to the optical finder 11 is blocked, and the luminous flux of the subject that has passed through the imaging optical system 2 is directly imaged on the image sensor 8. Thereafter, the image of the subject is converted into electronic image data by the image sensor 8 (step 704), and focus state detection, focus adjustment, photometry, and determination of exposure conditions are performed (operations similar to step 504 in FIG. 5) (step 705). ), A moving image is displayed on the liquid crystal panel 12 (step 706). As long as the determination of full-press detection of the still image shooting release button 601 at step 707 is no, the moving image shooting mode is continued and the process proceeds to step 709. If it is determined in step 707 that the still image photographing release button 601 is fully pressed, the main mirror 6 is returned to the optical path of the subject light beam, the mechanical shutter 9 is fully closed, the aperture 4 is opened, and step 713 (still image photographing) is performed. Mode). In step 709, it is determined whether or not the full-press of the moving image release button 602 is continued. If the full-press is pressed, the process proceeds to step 710 to record a moving image. If it is determined in step 709 that the full-press release button 602 for the moving image is OFF, the recording of the moving image is stopped, the mechanical shutter 9 is fully opened, the aperture 4 is stopped down to a position arbitrarily set by the user, and the main mirror 6 is stopped. Returns to step 704 while keeping the state retracted from the optical path of the subject light beam. When the full-pressing of the moving image shooting release button 602 is detected again, the moving image recording is resumed.
[0039]
On the other hand, when performing still image shooting from the power-off state, the release lock 603 is first released (step 701), and if it is not detected in step 702 that the release button 602 for the moving image is fully pressed, the process proceeds to step 712. In step 712, when full-pressing of the still-image release button 601 is detected, the mode is started as a still-image shooting mode, and preparation for still-image shooting is performed. At this time, the mechanical shutter 9 is fully closed, the aperture 4 is open, and the main mirror 6 is positioned on the optical path of the subject light beam passing through the photographing optical system. Thereafter, the process proceeds to step 713. If the full-press of the release button for moving image 602 is detected, the process proceeds to step 703 (transition to the moving image shooting mode). If it is determined in step 713 that the full-press of the moving image release button 602 has not been detected, the process proceeds to step 714, where half-press detection of the still image shooting release button 601 is performed. Subsequent operations (steps 714 to 719) are the same as steps 301 to 306 of the first embodiment described with reference to FIG. The standby state after the photographing of one frame of the still image is completed is that the mechanical shutter 9 is fully closed, the aperture 4 is open, and the main mirror 6 is in a standby state unless a full-press of the moving image photographing release button 602 is detected in step 713. The state is located on the optical path of the subject light beam.
[0040]
Although not explicitly shown in the flowchart of FIG. 7, when the release lock 603 is in the locked state, the power of the camera is turned off and the photographing ends.
[0041]
In the second embodiment, the case where the full-press state of the release button for moving image shooting is continued while performing moving image shooting has been described, but the full-press operation of the release button for moving image shooting is started at the start of moving image shooting. The configuration may be such that the operation is performed once and the release button for moving image shooting is fully pressed again when the moving image shooting is stopped, so that it is not necessary to continue the fully pressed state of the release button.
[0042]
As described above, in each of the above-described embodiments, the phase difference detection method is applied to the focus detection means during still image shooting, so that quick focus adjustment can be performed, and shooting can be performed by looking through the optical real image type finder. Since the subject light beam that has passed through the optical system can be directly observed, a still image in the intended shooting range can be shot without missing a shutter chance. Also, when shooting a moving image, the main mirror is retracted out of the optical path of the subject light beam, and a contrast detection method using an image sensor as the focus detection means is employed. In addition, moving image data as a subject image formed on the image sensor is displayed on a display device such as a liquid crystal panel outside the camera body, so that a moving image can be shot while checking the shooting range at any time. In this case, there is no need to look through the optical viewfinder, and visibility and operability can be improved.
[0043]
Further, in the second embodiment, after stopping the moving image shooting, it is possible to switch the mirror-up state or the mirror-down state by a simple operation depending on whether a still image or a moving image is to be shot next. Therefore, when the release button for moving image shooting is fully pressed, the moving image shooting can be resumed quickly. When the release button for still image shooting is half-pressed, the focus is quickly adjusted and preparation for still image shooting is started. It is possible.
[0044]
【The invention's effect】
As described above, according to the present invention, it is possible to detect an optimum focus state in still image shooting and moving image shooting, and to favorably observe images shot in still image shooting and moving image shooting. it can.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a camera according to a first embodiment of the present invention.
FIG. 2 is a perspective view from the back of the camera of FIG. 1;
FIG. 3 is a flowchart showing an operation of the camera of the first embodiment in a still image shooting mode.
FIG. 4 is a schematic diagram showing a camera when capturing a moving image according to the first embodiment.
FIG. 5 is a flowchart showing the operation of the camera according to the first embodiment in a moving image shooting mode.
FIG. 6 is a rear perspective view showing a camera according to a second embodiment of the present invention.
FIG. 7 is a flowchart illustrating a shooting operation of the camera according to the second embodiment.
[Explanation of symbols]
1 camera
2 Shooting lens
3 Focusing lens
4 Aperture
5 Fixed lens
6 Main Mira
7 Submirror
8 Image sensor
9 Mechanical shutter
10 Penta prism
11 Optical real image finder
12 LCD panel
13 Focus detection unit
14 Release button

Claims (7)

A photographing optical system for forming a subject image,
An image sensor that captures an optical image from the imaging optical system;
A movable mirror movable to a first position arranged in an optical path of the imaging optical system and a second position arranged outside the optical path of the imaging optical system;
First focus state detection means;
An optical apparatus comprising: a second focus state detection unit;
When the movable mirror is located at the first position, a focus state is detected by the first focus state detection means,
An optical apparatus wherein the focus state is detected by the second focus state detection means when the movable mirror is located at the second position. An optical device that performs video shooting and still image shooting using a common shooting optical system and an image sensor,
A movable mirror movable to a first position arranged in an optical path of the imaging optical system and a second position arranged outside the optical path of the imaging optical system;
First focus state detection means;
And second focus state detection means.
At the time of shooting a still image, the movable mirror is positioned at the first position, and the focus state is detected by the first focus state detection means.
An optical apparatus characterized in that the moving mirror is positioned at the second position and a focus state is detected by the second focus state detection means when capturing a moving image. An optical device that performs video shooting and still image shooting using a common shooting optical system and an image sensor,
A display element for displaying an image based on an output from the imaging element;
An optical viewfinder for guiding an optical image from the imaging optical system to the observation side,
A movable mirror movable to a first position arranged in an optical path of the imaging optical system and a second position arranged outside the optical path of the imaging optical system;
First focus state detection means;
And second focus state detection means.
At the time of photographing a still image, the movable mirror is positioned at the first position, the focus state is detected by the first focus state detecting means, and an optical image from the photographing optical system is observed by the optical finder. Guide to the side,
An optical apparatus for moving the moving mirror, wherein the movable mirror is positioned at the second position, a focus state is detected by the second focus state detection means, and an image is displayed by the display element. . 4. The optical apparatus according to claim 1, wherein the first focus detection unit uses a phase difference detection method. 4. The method according to claim 1, wherein the second focus detection unit is a contrast detection method that performs focus detection based on a contrast of a subject image captured by the imaging device. 5. Optical equipment. 4. The optical apparatus according to claim 2, wherein at the time of moving image capturing, the movable mirror is held at the second position, and an image is captured by the image capturing device. 5. A moving image is shot while the movable mirror is held at the second position, and after stopping the moving image shooting, the state where the movable mirror is held at the second position is continued or the movable mirror is moved to the first position. 7. The optical apparatus according to claim 6, wherein the optical device is selectively switched to be moved.

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