JP2009200767A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera which never drives under a heavy load to reduce time lag and energy loss at the time of taking an image during the live view display. <P>SOLUTION: In the case of executing imaging operation by full depression of a release button 21 under the condition that an imaging object is live-view displayed based on an output of CCD 221 on a liquid crystal monitor 26 (cam region c), while a movable reflection mirror 201 is held in the up-location (retreating location), only the charging operation of a shutter 213 is executed (cam region d and cam region e). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a camera, and more particularly to a camera having an imaging unit capable of imaging a light beam from a photographing optical system.

  2. Description of the Related Art Cameras such as digital cameras that have an image sensor that can capture a light beam from a photographing optical system and record a captured image acquired by the image sensor on a recording medium are widely used. A camera having a so-called live view display function (also referred to as a through image display function or an electronic viewfinder function) that displays an image repeatedly acquired by the above-described imaging device as a moving image on a display device is also known.

  When the live view display function is activated, the movable mirror is retracted from the imaging optical path, the focal plane shutter is fully opened, the subject image is guided to the image sensor, and the obtained subject image is continuously displayed on the liquid crystal monitor. it's shown. In a single-lens reflex camera having such a live view display function, in order to perform automatic focus adjustment by a TTL phase difference method generally employed, the live reflection is canceled and the movable reflecting mirror is moved into the photographing optical path. I had to. When the movable reflecting mirror is retracted, the shutter charge operation is also performed together, so that both mechanisms are driven, and there is a problem that the load is large and the time lag and energy loss are large.

Therefore, in order to solve such a problem, the present applicant retracts the movable reflecting mirror without performing the shutter charge when performing the automatic focus adjustment when the live view display function is operated. A camera was proposed in which the camera was lowered from the position to the observation position (see Patent Document 1).
JP 2007-298742 A

  In the camera disclosed in Patent Document 1 described above, when a shooting operation is started in response to a full-pressing operation of the release button during live view display in which the shutter is opened and the movable reflecting mirror is in the retracted position, shutter charging is performed. When performing, it is necessary to lower the movable reflecting mirror to the observation position and then return to the retracted position. For this reason, both mechanisms are driven, and there is a problem that the load is large and the time lag and energy loss are large.

  The present invention has been made in view of such circumstances, and when taking a picture during live view display, it is not driven with a large load so that time lag and energy loss are reduced. The purpose is to provide a camera.

  In order to achieve the above object, a camera according to a first aspect of the present invention is an imaging means capable of photographing a light beam from a photographing optical system, an insertion state capable of reflecting a light beam from the photographing optical system, and a camera from the photographing optical system. In a camera having a reflecting member movable to a retracted state retracted from a light beam, a shutter disposed between the imaging means and the reflecting member, and a motor that drives the reflecting member and the shutter by forward and reverse rotation, In a state where the charging of the shutter is completed, two types of states, a first state where the reflecting member is arranged in the inserted state and a second state where the reflecting member is arranged in the retracted state Have

  In the camera according to a second aspect of the present invention, in the first aspect of the invention, when the shutter is fully charged, the reflecting member is in the first state in the normal photographing mode and in the live view mode, the second state. State.

  A camera according to a third aspect of the invention is an imaging means capable of photographing a light beam from the photographing optical system, an insertion state capable of reflecting the light beam from the photographing optical system, and a retracted state retracted from the light beam from the photographing optical system. And a driving mechanism capable of driving the reflecting member and the shutter in cooperation with the charging operation of the shutter. A first driving state in which the reflecting member is operated and a second driving state in which the reflecting member is not operated during the charging operation of the shutter can be selected.

  In the camera according to a fourth aspect of the present invention, in the third aspect, the second driving state is selected when the live view mode is set.

  According to a fifth aspect of the present invention, there is provided a camera according to a fifth aspect of the present invention, an imaging unit capable of photographing a light beam from the photographing optical system, an insertion state capable of reflecting the light beam from the photographing optical system, and a retracted state retracted from the light beam from the photographing optical system. And a cam member that drives the reflecting member and the shutter by forward / reverse rotation, wherein the cam member comprises: a reflecting member that is movable between the imaging unit and the reflecting member; The first cam area for driving the reflecting member and the shutter, and the second cam area for driving only the shutter without driving the reflecting member.

The camera according to a sixth aspect of the present invention is the camera according to the fifth aspect, wherein the cam member is driven by forward / reverse rotation of a motor connected to the cam member and performs drive control within the first cam region. A first imaging mode; and a second imaging mode in which drive control is performed within the second cam region.
In the camera according to the seventh invention, in the fifth invention, the second shooting mode is a live view mode, and the first shooting mode is a normal shooting mode other than the live view mode. is there.

  The camera according to the present invention can provide a camera in which time lag and energy loss are reduced without driving with a large load when shooting is performed during live view display.

  Hereinafter, a preferred embodiment using a digital single-lens reflex camera to which the present invention is applied will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of the internal mechanism of the digital single lens reflex camera according to the first embodiment, (A) is a block diagram of the internal configuration along the optical axis direction of the photographing lens, and (B) is a block diagram. 2 is a block diagram of an internal configuration when viewed from the front side of a camera body 200.

  A release button 21 is disposed on the upper surface of the camera body 200. The release button 21 has a first release switch that is turned on when the photographer is half-pressed and a second release switch that is turned on when the photographer is fully pressed. When the first release switch (hereinafter referred to as 1R) is turned on, the camera performs photographing preparation operations such as focus detection, focusing of the photographing lens, and photometry of the subject brightness, and the second release switch (hereinafter referred to as 2R). When it is turned on, a photographing operation for capturing image data of a subject image is executed based on the output of a CCD (Charge Coupled Devices) 221 (see FIG. 6) as an image sensor.

  A movable reflecting mirror 201 is disposed in the mirror box of the camera body 200 on the optical axis of the photographing lens 101 (see FIG. 6) disposed inside the lens barrel 100. The movable reflecting mirror 201 captures a subject image at a position inclined by 45 degrees with respect to the optical axis of the photographing lens 101 in order to reflect a subject light beam to a finder optical system (for example, a pentaprism 207). In order to guide to a CCD (Charge Coupled Device) 221), it can be rotated to a position retracted from the photographing optical path. The rotation axis of the movable reflecting mirror 201 is along the direction perpendicular to the paper surface of FIG. The movable reflecting mirror 201 reflects the subject luminous flux upward. In the present embodiment, total reflection is performed upward. However, the present invention is not limited to this, and the reflection direction of the subject luminous flux is most appropriate in terms of the arrangement of the mechanism members and optical members, regardless of whether the camera body is on the right side or the left side. You may choose to

  A focusing screen 205 is disposed on the reflection optical axis of the movable reflection mirror 201, which is a matte surface for forming an image of a subject light beam by the photographing lens 101. The distance from the movable reflection mirror 201 is equivalent to that of the CCD 221. Arranged in position. Above the focusing screen 205, a pentaprism 207 for horizontally inverting the subject image is disposed. The finder eyepiece 33 is an eyepiece of the finder optical system, and the photographer can look into the eyepiece 33 to check the subject image.

  Near the center of the movable reflecting mirror 201 described above is a half mirror, and on the back surface of the movable reflecting mirror 201, a sub mirror 203 is provided for distance measurement for reflecting the subject light beam that has passed through the half mirror section. ing. The sub mirror 203 is rotatable with respect to the movable reflection mirror 201. When the movable reflection mirror 201 is retracted from the photographing optical path and the subject light beam is incident on the CCD 221, the sub mirror 203 is rotated to a position covering the half mirror portion. When the movable reflecting mirror 201 is at the subject image observation position as shown in the figure, the movable reflecting mirror 201 is at a position perpendicular to the movable reflecting mirror 201. The movable reflecting mirror 201 is driven by a shutter / mirror driving unit 303. Further, a distance measuring unit 218 including a TTL phase difference type distance measuring circuit 217 (see FIG. 6) including a distance measuring sensor is disposed on the reflected light path of the sub-mirror 203. The amount of focus shift of the subject image formed by is detected.

A focal plane type shutter 213 for controlling the exposure time is disposed behind the movable reflecting mirror 201. The shutter 213 includes a shutter controller 213a including a shutter driving mechanism 215 (FIG. 6) and a shutter / mirror driving unit. The drive is controlled by 303. A CCD 221 serving as an image sensor is disposed behind the shutter 213 and photoelectrically converts a subject image formed by the photographing lens into an electrical signal. In the present embodiment, a CCD is used as an image sensor. However, the present invention is not limited to this, and a complementary metal oxide (CMOS) is used.
Needless to say, a two-dimensional imaging device such as Semiconductor) can be used.

  A liquid crystal monitor 26 is disposed on the rear surface of the camera body 200, and a live view display is possible based on an image acquired by the CCD 221, and a replay display of a captured image recorded on the recording medium 245 is possible. When the information display mode is set, information such as shooting information is displayed.

  A battery 305 for supplying power to the entire camera body is disposed on the left side when viewed from the front of the camera body 200. Further, as will be described later, a mirror shutter (hereinafter abbreviated as “MS”) motor 301 serving as a driving source for the shutter 213 and the movable reflecting mirror 201 is disposed on the right side of the main body, and transmits the driving force of the MS motor 301. The shutter / mirror driving unit 303 for the motor is disposed below the MS motor 301 so as to engage with the driving shaft of the MS motor 301. A shutter control unit 213 a for controlling the driving of the shutter 213 is disposed beside the movable reflecting mirror 201.

  Next, the driving mechanism of the movable reflecting mirror 201 and the shutter 213 will be described with reference to FIGS. 2A and 2B are diagrams showing the shutter 213 and the movable reflecting mirror 201, where FIG. 2A is a perspective view of the shutter 213, FIG. 2B is a front view of the shutter 213, and FIG. 2C is a perspective view of the mirror. ) Shows the mirror-down state of the movable reflecting mirror 201, and (E) shows the mirror-up state. As shown in FIG. 2A, a shutter control unit 213a is disposed on the side of the shutter 213, and a shutter set lever 213b protrudes below the shutter control unit 213a. In the initial state, the shutter set lever 213b is in the position (a) indicated by the oblique line in FIG. 2B, and in the shutter charge completed state, the shutter set lever 213b is in the position indicated by the solid line (A) in FIG. Moving.

  When the movable reflection mirror 201 is in the down state, the sub mirror 203 is rotated to a position opened with respect to the movable reflection mirror 201 as shown in FIG. As shown in FIG. 2 (D), a mirror down spring 345 is provided on the rotating shaft side of the movable reflecting mirror 201, and this mirror down spring 345 is attached in the counterclockwise direction in FIG. It is energized. The movable reflecting mirror 201 biased by the mirror down spring 345 is regulated at a position of 45 degrees with respect to the photographing optical path by a position regulating pin 349.

  The mirror drive lever 341 has an L-shape, and is biased by a mirror drive spring 343 in the counterclockwise direction, that is, the up direction for raising the mirror. One end of the mirror drive lever 341 is engaged with an engagement pin 347 fixed to the movable reflection mirror 201. Note that the spring force of the mirror drive spring 343 is always stronger than the spring force of the mirror down spring 345.

  In the mirror down state, the mirror drive lever 341 is rotated clockwise by the mirror charge lever 351 against the urging force of the mirror drive spring 343, and is in the position shown in FIG. In this state, when the mirror charge lever 351 that locks the mirror drive lever 341 moves to the right, the mirror drive lever 341 rotates counterclockwise by the biasing force of the mirror drive spring 343. With this rotation, the movable reflecting mirror 201 is rotated from the down position (observation position) to the up position (retracted position) via the engagement pin 347, and the state shown in FIG. From this state, the mirror charge lever 351 moves to the left against the urging force of the mirror drive spring 343 and reaches the position shown in FIG.

  FIG. 3 is an exploded perspective view of the shutter / mirror driving unit 303 to which the driving force of the MS motor 301 is transmitted. The driving force of the MS motor 301 is transmitted to the cam gear 357 via the gear 363. A mirror charge cam 353 having a circumferential surface that changes in the radial direction of the rotation axis of the cam gear 357 is fixed on the upper surface of the cam gear 357, and one end of the mirror charge lever 351 is provided on the cam surface 353a of the mirror charge cam 353. Is engaged.

  The other end of the mirror charge lever 351 is in contact with the mirror drive lever 341. Since the mirror drive lever 341 is spring-biased in a direction to rotate the mirror charge lever 351 clockwise (see FIG. 2), one end of the mirror charge lever 351 is in pressure contact with the mirror charge cam 353. Become. Accordingly, as the cam gear 357 rotates, the mirror charge cam 353 integrated with the cam gear 357 rotates, and the mirror charge lever 351 pressed against the cam surface of the mirror charge cam 353 rotates.

  A cam surface 355a of a shutter charge cam 355 having a circumferential surface that changes in the radial direction of the rotation axis of the cam gear 357 is fixed to the lower surface of the cam gear 357. The shutter charge cam 355 includes a shutter charge lever 361. One end is engaged. The other end of the shutter charge lever 361 is in contact with the shutter set lever 213b. Accordingly, as the cam gear 357 rotates, the shutter charge cam 355 integrated therewith also rotates, and the shutter charge lever 361 engaged with the cam surface 355a of the shutter charge cam 355 rotates, and the shutter set lever. 213b also rotates.

  4A shows the cam surface of the shutter charge cam 355 viewed from the BB direction, and FIG. 4B shows the cam surface of the mirror charge cam 353 viewed from the AA direction. As shown in the figure, the cam surface 355a of the shutter charge cam 355 is composed of five areas: a top dead center area a, a lift cam b, a bottom dead center area c, a lift cam d, and a top dead center area e. In addition, the cam surface 353a of the mirror charge cam 353 is composed of five areas: a top dead center area a, a lift cam b, a bottom dead center area c, a bottom dead center area d, and a bottom dead center area e, as shown in the figure. Has been.

  Although not shown, a plurality of photo interrupters are provided for detecting the rotation or movement of the mirror charge cam 353, the shutter charge cam 355, or a member driven integrally with these. By these photo interrupters, a detection for outputting L level while in the region a, c detection for outputting L level while in the region c, and e detection for outputting L level while in the region e are performed ( (See FIG. 5).

  In the cam area a, the shutter charge cam 355 is at the top dead center and is in a charged state as shown in FIGS. Although the shutter 213 is in a charged state, the shutter set lever 213b is not retracted, so that the shutter curtain cannot run and exposure is not performed.

  The mirror charge cam 353 is also at the top dead center, and the movable reflecting mirror 201 is in the down state (see FIG. 2D), that is, in the observation position (reflection position) where the subject light beam is reflected by the finder optical system. In this state, the subject luminous flux is guided to the finder optical system, so that the subject image can be observed by the finder, and the subject luminous flux is also guided to the photometric element 211 described later, so that photometry is possible, and further, the sub mirror 203 As a result, the subject luminous flux is guided to the distance measuring unit 218, so that distance measurement and driving of the photographing lens to the in-focus position (automatic focus adjustment) are possible.

  In the cam area c, the mirror charge cam 353 is at the bottom dead center, and the movable reflecting mirror 201 is in the up state (see FIG. 2E), that is, in the retracted position retracted from the photographing optical path. The shutter charge cam 355 is also at the bottom dead center, and the shutter set lever 213b is at the position shown in FIGS. There are two cases where the cam region c is present, one is for normal shooting, and the other is for live view.

  In the state of the cam area c, it is impossible to observe the subject image with the finder, and the subject image is formed on the CCD 211 as the image sensor, so that an image signal from the CCD 221 can be output. In the live view mode, the subject image can be displayed on the liquid crystal monitor 26 based on the image signal from the CCD 221 and the subject image can be observed. Further, when 2R is turned on by operating the release button 21, if the shutter charge is completed, the shutter curtain can travel, and the CCD 211 adjusts the shutter curtain 213 in accordance with the travel of the shutter curtain. A still image can be taken and recorded.

  The cam area b is a transition area between the area a and the area c, and both the mirror charge lever 351 and the shutter charge lever 361 rotate in this area. On the other hand, only the cam surface 355a of the shutter charge cam 355 changes in the cam region d. Therefore, the shutter lever 361 rotates and the shutter set lever 213b rotates, but the cam surface 353a of the mirror charge cam 353 Since there is no change, the mirror charge lever 351 does not rotate.

  As described above, although the movements of the cam area b and the cam area d are different, in this embodiment, when moving to the shooting operation during live view display, the charging operation of the shutter 213 is performed using the d area. However, the up / down operation of the movable reflecting mirror 201 is not performed. On the other hand, when performing a normal shooting operation, that is, a shooting operation in a state where live view display is not being performed, the cam region b is used to perform the up / down operation of the movable reflecting mirror 201 and the shutter 213. The charging operation is performed.

  Note that the relative rotational positional relationship between the mirror charge cam 353 and the shutter charge cam 355 in FIG. 4 has been described with the same reference position, but the arrangement of the mirror charge lever 351 and the shutter char lever 361 indicates the mutual relationship. The reference position changes.

  Next, with reference to FIG. 6, an overall configuration mainly including an electric system of the digital single-lens reflex camera will be described. In the digital single-lens reflex camera according to the present embodiment, as described above, the interchangeable lens 100 and the camera body 200 are configured separately, and both are electrically connected by the communication contact 300. Note that the interchangeable lens 100 and the camera body 200 can be configured integrally.

  Inside the interchangeable lens 100, photographing lenses 101 and 102 for focus adjustment and focal length adjustment, and a diaphragm 103 for adjusting the aperture amount are arranged. The photographing lenses 101 and 102 are driven by a lens driving mechanism 107, and the diaphragm 103 is connected to be driven by a diaphragm driving mechanism 109.

  The lens driving mechanism 107 and the aperture driving mechanism 109 are each connected to a lens CPU 111, and the lens CPU 111 is connected to the camera body 200 via a communication contact 300. The lens CPU 111 controls the inside of the interchangeable lens 100. The lens CPU 111 controls the lens driving mechanism 107 to perform focusing and zoom driving, and also controls the aperture driving mechanism 109 to perform aperture value control.

  In the camera main body 200, the movable reflecting mirror 201, the sub mirror 203, the focusing screen 205, and the pentaprism 207 are arranged as described above. The movable reflecting mirror 201 is driven by a mirror driving mechanism 219. An eyepiece lens 209 for observing a subject image is disposed on the emission side of the pentaprism 207, and a photometric sensor 211 is disposed at a position on the side of the pentaprism 207 that does not interfere with the observation of the subject image. The focusing screen 205, the pentaprism 207, and the eyepiece lens 209 constitute a part of the finder optical system.

  As described above, the sub mirror 203 is provided on the back surface of the movable mirror 201, and the distance measuring circuit 217 including the focus sensor is disposed in the reflection direction of the sub mirror 203. Further, a shutter 213 is disposed behind the movable mirror 201, and this shutter 213 is driven and controlled by a shutter drive mechanism 215. A CCD 221 as an image sensor is disposed behind the shutter 213, and the subject image formed by the photographing lenses 101 and 102 is photoelectrically converted into an electrical signal.

  The CCD 221 is connected to a CCD drive circuit 223, and analog / digital conversion (AD conversion) is performed by the CCD drive circuit 223. The CCD drive circuit 223 is connected to the image processing circuit 227 via the CCD interface 225. The image processing circuit 227 performs various types of image processing such as color correction, gamma (γ) correction, and contrast correction. Also, image data for live view display on the liquid crystal monitor 26 is generated.

The image processing circuit 227 is an ASIC (Application Specific Integrated).
Circuit-specific integrated circuit) 271 is connected to the data bus 261. In addition to the image processing circuit 227, the data bus 261 includes a body CPU 229, a compression circuit 231, a flash memory control circuit 233, an SDRAM control circuit 236, an input / output circuit 239, a communication circuit 241, a recording medium control circuit 243, and a video signal output. A circuit 247 and a switch detection circuit 253 are connected.

  The body CPU 229 connected to the data bus 261 controls the flow of this digital single lens reflex camera. A compression circuit 231 connected to the data bus 261 is a circuit for compressing the image data stored in the SDRAM 237 with JPEG or TIFF, and expanding the compressed image data. Note that image compression is not limited to JPEG or TIFF, and other compression methods can be applied.

  A flash memory control circuit 233 connected to the data bus 261 is connected to a flash memory 235. The flash memory 235 stores a program for controlling the flow of the single-lens reflex camera. The CPU 229 controls the digital single-lens reflex camera according to the program stored in the flash memory 235. Note that the flash memory 235 is an electrically rewritable nonvolatile memory.

  The SDRAM 237 is connected to the data bus 261 via the SDRAM control circuit 236, and the SDRAM 237 temporarily stores the image data processed by the image processing circuit 227 or the image data compressed by the compression circuit 231. This is a buffer memory.

  The input / output circuit 239 connected to the above-described photometric sensor 211, shutter drive mechanism 215, distance measuring circuit 217, and mirror drive mechanism 219 controls input / output of data with each circuit such as the body CPU 229 via the data bus 261. . The communication circuit 241 connected to the lens CPU 111 via the communication contact 300 is connected to the data bus 261, and exchanges data with the body CPU 229 and the like and communicates control commands.

  A recording medium control circuit 243 connected to the data bus 261 is connected to the recording medium 245 and controls recording of image data and the like on the recording medium 245. The recording medium 245 can be loaded with any rewritable recording medium such as an xD picture card (registered trademark), a compact flash (registered trademark), an SD memory card (registered trademark), or a memory stick (registered trademark). And is detachable from the camera body 200. In addition, the hard disk may be configured to be connectable via a communication contact (not shown).

  The video signal output circuit 247 connected to the data bus 261 is connected to the liquid crystal monitor 26 via the liquid crystal monitor drive circuit 249. The video signal output circuit 247 is a circuit for converting the image data stored in the SDRAM 237 and the recording medium 245 into a video signal to be displayed on the liquid crystal monitor 26. The liquid crystal monitor 26 is disposed on the back surface of the camera body 200. However, the liquid crystal monitor 26 is not limited to the back surface as long as the photographer can observe the image.

  A switch for detecting the first stroke and the second stroke of the release button 21, a switch for instructing a playback mode, a switch for instructing the movement of the cursor on the screen of the liquid crystal monitor 26, a switch for instructing a shooting mode, and each selected mode The various switches 255 such as an OK switch for determining etc. are connected to the data bus 261 via the switch detection circuit 253.

  Next, the flow of live view display will be described with reference to FIG. When live view display is started by operating an operation button (not shown) of the camera body 200, first, initial setting for performing live view is performed (S1). In this initial setting, power is supplied to the CCD 221 and live view display conditions are set to keep the brightness of the live view display on the liquid crystal monitor 26 appropriate. 213 is also opened. The latter will be described later with reference to FIG. In this live view initial setting, live view display is started.

  Next, it is determined whether or not the release button 21 is half-pressed, that is, whether or not 1R is on (S3). If the result of determination is that it is on, processing advances to step S5, and an automatic focus adjustment (AF) subroutine is executed. In this subroutine, the movable reflecting mirror is lowered, the subject light flux is guided to the distance measuring circuit 217, and the distance is measured by the TTL phase difference AF. Details will be described later with reference to FIG.

  When the automatic focus adjustment (AF) in step S5 ends, it is subsequently determined whether or not the release button 21 has been fully pressed, that is, whether or not 2R is on (S7). As a result of the determination, if 2R is on, the process proceeds to step S9, and the photographing operation is executed. This photographing operation subroutine will be described later with reference to FIG. When the photographing operation is completed, the process returns to step S3, and the above steps are repeated.

  If the result of determination in step S <b> 7 is that 2R is off, processing proceeds to step S <b> 11 and it is determined whether 1R is on. If the release button 21 is half-pressed but not fully pressed, a standby state is repeated in which the determinations in steps S7 and S11 are repeated. When the photographer's hand is released from the release button 21 and 1R is turned off, the process returns to step S3 and the above-described steps are repeated.

  As a result of the determination in step S3, if 1R is off, the process proceeds to step S13, and the display mode is switched, that is, an operation (not shown) is changed from the display of the subject image in the live view to the optical display in the viewfinder optical system. It is determined whether or not the button has been switched. If the result of determination is that display mode has not been switched, processing returns to step S3.

  On the other hand, when the display mode is switched, in step S15, in order to stop the live view display of the subject image on the liquid crystal monitor 26, processing such as power supply stop of the CCD 221 is performed. The live view display is started in the live view initial setting in step S1, and until the live view display is stopped in step S15, the liquid crystal monitor 26 continuously displays the image data repeatedly acquired by the CCD 221. Live view display is made.

  Subsequently, in step S17, the shutter 213 and the movable reflecting mirror 201 are initialized. In the live view, the movable reflecting mirror 201 is moved to the up position (retracted position, reflecting position), but the subject image is observed with the optical viewfinder, and the photographing information is displayed on the liquid crystal monitor 26. This is a process for returning to the display mode. In this initialization, the MS motor 301 is driven until the aforementioned mirror charge cam 353 and shutter charge lever 361 reach the cam area a.

  Next, the live view initial setting in step S1 will be described in detail with reference to the flowchart shown in FIG. 8 and the timing chart shown in FIG. Before the live view is performed, the mirror charge cam 353 and the shutter charge cam 355 are in the cam area a. When the live view is initialized, the MS motor 301 drives the cam gear 357 to the cam area c in which the live view is performed.

  First, power is supplied to the shutter magnet Mg for holding the shutter curtain of the shutter 213, and the front curtain and the rear curtain are held (S21). Thereafter, the MS motor 301 is reversely rotated (t1 in FIG. 12), and the mirror charge cam 353 and the shutter charge cam 355 are driven from the cam area a through the cam area b to the cam area c (S23). During this time, the mirror driving lever 341 moves from the position of FIG. 2D toward the position of FIG. 2E, and the movable reflecting mirror 201 is moved to the up position (retracted position) by the spring force of the mirror driving spring 343. Rotate towards. The shutter set lever 213b moves from the position (A) in FIG. 2B toward the position (A). When the cam area c is reached (S25, t2 in FIG. 12), the rotation of the MS motor 301 is stopped (S27). As a result, the movable reflecting mirror 201 reaches the up position (retracted position), and the shutter set lever 213b becomes the retracted position (the position (A) in FIG. 2B).

  Subsequently, the power supply to the magnet Mg for holding the shutter front curtain of the shutter 213 is turned off, and the shutter front curtain is caused to travel (S29). When the travel of the shutter front curtain is completed (t3 in FIG. 12), the shutter 213 is fully opened, and the subject image is formed on the CCD 221, so reading of the image signal from the CCD 221 as an imager is started (S31). Based on the read image signal, live view display is performed on the liquid crystal monitor 26 (S33). In order to perform live view display, image signals are repeatedly read from the CCD 221 (for example, 30 frames / second) and displayed as moving images.

  Next, the automatic focus adjustment (AF) operation in step S5 will be described in detail with reference to the flowchart shown in FIG. 9 and the timing chart shown in FIG. In this subroutine, as described above, when the release button 21 is half-pressed, the movable reflecting mirror 201 is lowered to perform distance measurement and photometry.

  First, the live view display displayed on the liquid crystal monitor 26 is frozen (fixed) (S41). This is a measure against the interruption of the live view because the movable reflection mirror 201 goes down and the subject image is not formed on the CCD 221 so that the image signal cannot be acquired. Subsequently, forward rotation of the MS motor 301 is started (S43, t11 in FIG. 12), and reading from the CCD 221 is stopped (S45).

  In the normal rotation of the MS motor 301, it is driven from the c region to the a region through the b region. During this time, the mirror drive lever 341 moves while charging the mirror drive spring 343 from the position of FIG. 2E toward the position of FIG. 2D, and the movable reflecting mirror 201 is moved by the spring force of the mirror down spring 345. Lower to the down position (reflection position, observation position). Further, the shutter set lever 213b moves to the shutter charge completion position ((A) in FIG. 2B).

  When the region a is reached (S47, t12 in FIG. 12), the rotation of the MS motor 301 is stopped (S49). As a result, the movable reflecting mirror 201 is in the down position (observation position, reflection position), and the shutter set lever 213b is in a shutter charge completion state. In this state, distance measurement and photometry are performed (S51). That is, the distance measuring unit 218 receives the subject image through the movable reflecting mirror 201 and the sub mirror 201 and performs a distance measuring operation. The photometric element 211 measures a part of the subject light beam guided from the movable reflecting mirror 201, and the body CPU 229 calculates an exposure value such as a shutter speed and an aperture value based on the photometric value.

  Next, the body CPU 229 calculates a driving amount for focusing based on the focus shift amount of the photographing lens 101 obtained by the distance measuring operation in step S51, and the automatic focusing is performed via the lens CPU 111 and the lens driving mechanism 107. Adjustment is performed (S53). In FIG. 12, LD indicates lens driving, and AF / AE indicates automatic focus adjustment and distance measuring operation.

  Following the automatic focus adjustment, the MS motor 301 is driven in reverse (S55, t14 in FIG. 12). This is a process of returning from the a region to the c region through the b region, contrary to the conventional method. During this time, the movable reflecting mirror 201 returns from the down position to the up position, and the shutter set lever 213b returns from the shutter charge completion position to the shutter charge incomplete position. When the region c is reached (S57, t14 in FIG. 12), the rotation of the MS motor 301 is stopped (S59).

  Thereafter, reading of the image signal from the CCD 221 stopped in step S45 is resumed (S61, t14 in FIG. 12), the freeze state of the liquid crystal monitor 26 is released, and live view display is performed (S63). The distance measuring operation must be completed while the movable reflecting mirror 201 is in the down position (reflection position, observation position). However, the lens driving operation of the photographing lenses 101 and 102 is performed by the movable reflecting mirror 201 being retracted. It is possible to do it while doing. Therefore, in FIG. 12, the lens driving (LD) continues after the retracting operation of the movable reflecting mirror 201. If the live view is resumed, the photographer can observe the state of focusing through the liquid crystal monitor 26.

  Next, the photographing operation in step S9 will be described in detail using the flowchart shown in FIG. 10 and the timing chart shown in FIG. As described above, this subroutine acquires a still image based on the output from the CCD 221 and records it on the recording medium 245 when the release button 21 is fully pressed during live view display. Live view display is performed in the c region, but once the drive is performed up to the e region, the movable reflecting mirror 201 holds the up position (retracted position), and after performing the shutter charge of the shutter 213, returns to the c region again. Drive to acquire the image signal of the still image.

  First, the live view display on the liquid crystal monitor 26 is turned off (S71), and reading of the CCD 221 is stopped (S73). For live view display, the shutter 213 was in an open state, but here the magnet Mg that holds the shutter rear curtain is turned off and the shutter rear curtain is run (S75). Subsequently, the MS motor 301 is reversely rotated (S77, t12 in FIG. 12), and is driven from the c region to the e region through the d region. As a result, the shutter set lever 213b moves from the retracted (shutter charge incomplete) position to the shutter charge complete position ((A) in FIG. 2B).

  When it is detected that the region e has been reached (S79, FIG. 12t22), the rotation of the MS motor 301 is stopped (S81). Subsequently, power is supplied to the shutter front curtain and rear curtain holding magnet Mg, and the front curtain and rear curtain are held (S83). Thereafter, the forward rotation drive of the MS motor 301 is started (S85, t23 in FIG. 12). By this normal rotation driving, the e region returns to the c region again through the d region. In this process, the movable reflecting mirror 201 remains in the up position (retracted position). Further, the shutter set lever 213b moves from the position (A) to the position (A) in FIG.

  When reaching the region c (S87, t24 in FIG. 12), the forward rotation drive of the MS motor 301 is stopped (S89). In this state, the movable reflecting mirror 201 is retracted from the photographing optical path, and the shutter 213 is ready for exposure, so that the exposure operation is performed (S91). First, energization of the magnet Mg holding the shutter front curtain is stopped, and the travel of the shutter front curtain is started (t25 in FIG. 12). When the time corresponding to the shutter speed calculated in advance elapses, the running of the shutter rear curtain is started (t26 in FIG. 12). As the shutter rear curtain travels, the shutter 213 is closed, and the exposure operation ends.

  When the exposure operation is completed, reading of the image signal from the CCD 221 is started (S93). Subsequently, it is determined whether or not the continuous shooting mode is set (S95). Since the continuous shooting mode is set by the menu mode or the like, this setting state is determined in step S95. As a result of the determination, if the continuous shooting mode is set, the process jumps to step S7 (FIG. 7), and the photographing operation in step S9 is repeated as long as the 2R switch is on.

  On the other hand, if the result of determination in step S95 is that the continuous shooting mode has not been set, the MS motor 301 is driven in reverse rotation (S97) to shift from region c to region e through region d. During this time, the movable reflecting mirror 201 remains in the up position, and the shutter 213 is charged with the shutter. When it is detected that the region is the region e (S99, t27 in FIG. 12), the reverse rotation driving of the MS motor 301 is stopped (S101), the shutter magnet Mg is turned on, and the leading and trailing curtains are held (S102).

  Subsequently, the MS motor 301 is driven to rotate forward (S103), and is returned from the e region to the c region through the d region. When reaching the region c (S105, t28 in FIG. 12), the forward rotation drive of the MS motor 301 is stopped (S107). This state is a state where the movable reflecting mirror 201 remains retracted from the photographing optical path and the shutter 213 is charged. In order to start the live view, first, the magnet of the shutter front curtain is turned off (S108), thereby causing the shutter front curtain to travel, leading the subject image on the CCD 221 and starting reading of the image signal from the CCD 221 (S109). ). Next, live view display is resumed on the liquid crystal monitor 26 based on the read image signal (S111), and the process returns to the original flow.

  Next, the shooting operation in the normal mode in which the live view display is not performed and the subject is observed with the optical viewfinder will be described with reference to FIG. In this normal mode, the mirror charge lever 351 is engaged with the a region of the mirror charge cam 353, and the shutter charge lever 361 is engaged with the a region of the mirror charge cam 355.

  In the normal mode, when the 2R switch is turned on, the photographing operation is started. First, the magnet that holds the shutter front curtain and rear curtain of the shutter 213 is turned on (S121). Subsequently, the MS motor 301 is driven reversely (S123), and is driven from the a region to the c region through the b region. As a result, the movable reflecting mirror 201 is in an up state as the mirror driving lever 341 is driven, and retracts from the photographing optical path of the photographing lenses 101 and 102. Further, the shutter set lever 213b moves from the shutter charge completion position ((A) in FIG. 2 (B)) to the retracted position (FIG. 2 (B) (A)).

  When it is detected that the region c has been reached (S125), the reverse rotation driving of the MS motor 301 is stopped. The area c is an area for performing a photographing operation. In this state, the movable reflecting mirror 201 is retracted from the photographing optical path, and the shutter 213 is in an exposure enabled state, so that the exposure operation is performed (S129). First, energization of the magnet Mg holding the shutter front curtain is stopped, and the travel of the shutter front curtain is started. When the time corresponding to the shutter speed calculated in advance elapses, the running of the shutter rear curtain is started. Since the exposure operation is ended by the movement of the shutter rear curtain, reading of the still image signal from the CCD 221 is started (S131).

  Subsequently, the MS motor 301 is driven to rotate forward (S133), and is shifted from the c region to the a region through the b region. During this time, the movable reflecting mirror 201 is driven to the down position (reflecting position), and the shutter 213 is shutter charged. When it is detected that the area is a (S135), the forward rotation driving of the MS motor 301 is stopped (S137). When the MS motor 301 is stopped, the original routine is restored.

  As described above, in the first embodiment of the present invention, when the release button 21 is fully pressed (2R switch is turned on) in the live view mode and the photographing operation is performed (S9), the movable reflecting mirror 201 is photographed. Only the shutter charging operation of the shutter 213 can be executed while maintaining the position retracted from the optical path. That is, only the shutter charge is performed by moving from the c region to the e region, and the movable reflecting mirror 201 is not driven at all. In this way, when moving to the shooting operation in the live view mode, unnecessary mirror charging is not performed, so that the load on the driving source is reduced, and time lag and energy loss can be reduced.

  Further, as can be seen from FIG. 5, in the region b where the shutter 213 is charged and the movable reflecting mirror 201 is driven at the same time, the cam gradient is gentle. As a result, the drive takes time but the energy loss is reduced. it can. On the other hand, in the d region where only shutter charge is performed in the live view, the cam gradient can be made steep, and as a result, it takes less time to drive and the time lag can be reduced.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the first embodiment of the present invention, so-called single AF is performed in which the automatic focus adjustment is performed once by half-pressing the release button 21. However, in the second embodiment, in addition to the single AF, continuous automatic operation is performed. This is an example of performing continuous AF for performing focus adjustment. Since the second embodiment is the same as the first embodiment except for a part of the flow of the live view display mode shown in FIG. 7 of the first embodiment, the differences will be mainly described.

  In the live view display mode shown in FIG. 13, the same steps as those in the flow of FIG. 7 are given the same step numbers, and detailed descriptions thereof are omitted. When the live view initial setting in step S1 is completed, the AF mode set by an AF mode setting member (not shown) is determined. In the present embodiment, only two AF modes, the single AF mode and the continuous AF mode, can be set as the AF mode. If it is determined in step S201 that the single AF is selected, the process proceeds to step S3. Proceed and process in single AF mode. Since this single AF mode is the same as that of the first embodiment, description thereof is omitted.

  If it is determined in step S201 that the mode is not the single AF mode, that is, the continuous AF mode, the process proceeds to step S203, and it is determined whether the release button 21 is half-pressed, that is, whether 1R is on. Do. If 1R is off, the process returns to step S201, and is in a standby state until the release button 21 is half-pressed. On the other hand, when 1R is turned on, the process proceeds to step S205, and the automatic focus adjustment (AF) subroutine described in FIG. 9 is executed. That is, the movable reflecting mirror 201 is rotated from the retracted position to the observing position, and the photographing lens 101 is driven to the in-focus position based on the output of the distance measuring circuit 217 in this state.

  When this AF operation ends, it is next determined whether or not 1R is on (S207). If the hand is released from the release button 21, the process returns to step S201, and the above steps are repeated. On the other hand, if the release button 21 has been pressed halfway, it is determined whether the release button 21 has been fully pressed, that is, whether or not 2R is on (S209). The process proceeds to S9, and the photographing operation is executed as in the first embodiment.

  On the other hand, if 2R is off, the process proceeds to step S211, where it is determined whether the timer has elapsed a predetermined time. If the predetermined time has not elapsed, the timer is reset and started (S213). The continuous AF mode is a mode in which single AF is repeatedly performed at predetermined time intervals, and this predetermined time is measured in steps S211 and S213.

  If the AF mode is changed from the continuous AF mode to the single AF mode while the live view mode is being executed, the process proceeds to step S3 in step S201, and if the single AF mode is changed to the continuous AF mode, In step S201, the process proceeds to step S203, and the AF mode is changed.

  As described above, in the second embodiment, when the live view is performed and the single AF mode is set, the movable reflecting mirror 201 is moved from the retracted position in response to the half-press of the release button 21. When the automatic focusing is enabled by moving to the reflecting position, and the continuous AF mode is set, the movable reflecting mirror 201 reflects at a predetermined time interval while the release button 21 is pressed halfway. It moves to the position and performs automatic focusing.

  Next, a third embodiment of the present invention will be described with reference to FIG. In the first and second embodiments of the present invention, the distance measurement for automatic focus adjustment is performed by TTL phase difference AF, but in the third embodiment, it is performed by so-called contrast AF. When the live view mode is entered, the live view is started at the timing t3 as in the first embodiment.

  That is, in this state, the movable reflecting mirror 201 is in the up position (retracted position) and the shutter 213 is open, so that a subject image is formed on the CCD 221, and an image signal is read from the CCD 221. Live view display is performed on the liquid crystal monitor 26.

  When the photographer presses the release button 21 halfway and the 1R switch is turned on (t31 in FIG. 14), distance measurement is performed by contrast AF based on the image signal read from the CCD 221. Based on this, the lens driving mechanism 107 drives the photographing lenses 101 and 102 to the in-focus position. Note that the focus drive at this time is called a hill-climbing method, and the photographing lenses 101 and 102 are driven so that the high-frequency component peak position in the image signal of the CCD 221 is obtained.

  When the release button 21 is fully pressed and the 2R switch is turned on, an exposure operation is performed. When the exposure operation is completed, live view display is resumed.

  As described above, in the third embodiment of the present invention, when performing the live view display, when the release button 21 is half-pressed to perform automatic focus adjustment, contrast AF is performed based on the output of the CCD 221. Yes (Imager AF). For this reason, unlike the first embodiment, it is not necessary to drive the movable reflecting mirror 201 or the like in automatic focus adjustment, and time lag and energy loss can be reduced.

  As described above, in each embodiment of the present invention, when moving to a shooting operation in a live view state, the shutter is held with the movable reflecting mirror 201 held at the up position (retracted position). Since the shutter charging of 213 is performed, it is possible to provide a camera that does not drive with a large load and reduces time lag and energy loss.

  In each embodiment of the present invention, either the first state in which the movable reflecting mirror 201 is driven or the second state in which the movable reflecting mirror 201 is not driven is selectively selected in cooperation with the shutter charge operation. It can be carried out. For this reason, when only shutter charge is required, the second state may be selected, and an unnecessary mirror charge is not required. Therefore, it is possible to provide a camera with reduced time lag and energy loss. it can.

  Furthermore, in each embodiment of the present invention, the forward rotation and the reverse rotation of the mirror charge cam 353 and the shutter charge cam 355 are used well, and only the shutter charge is performed without performing the mirror charge at the time of photographing. For this reason, it can be reduced in size with a simple configuration.

  Furthermore, in each embodiment of the present invention, the state in which the movable reflecting mirror 201 is inserted in the imaging optical path in a state where the forward rotation and the reverse rotation of the MS motor 301 are used well and mirror charging is completed with one motor. Then, it is possible to switch to a state of being retracted from the photographing optical path. Since only one motor is required, the size of the camera can be reduced.

  In each embodiment of the present invention, the two cams of the mirror charge cam 351 and the shutter charge cam 355 are employed. However, the present invention is not limited to this. For example, a single cam can be used for mirror charging and shutter charging. You may make it divide into. In addition, the shift to the live view and the AF at the time of the live view are switched using the forward rotation and the reverse rotation of the cam. However, the switching may be performed using a planetary gear or the like. In any case, at the time of a shooting operation performed in response to the release button 21 being fully pressed, the movable reflecting mirror 201 may be held in the up position (retracted position) to perform shutter charging.

  In each embodiment of the present invention, the image sensor is one of the CCDs 221, but it is needless to say that the present invention can also be applied to a camera that performs live view display by switching the outputs of a plurality of image sensors.

  Furthermore, in each embodiment of the present invention, the movable reflecting mirror 201 switches the optical path between the finder optical system and the image sensor. However, the present invention is not limited to this. For example, the image sensor for image recording and the image sensor for object image observation are used. Of course, the present invention can be applied even if it is configured to be switched between.

  In the embodiment of the present invention, an example in which a single-lens reflex camera is applied as a digital camera has been described. However, as a camera, a built-in camera such as a mobile phone or a PDA (Personal Digital Assistant) is used. But you can. In any case, the present invention can be applied to any camera that charges the movable mirror and the shutter.

  As described above, the first to third embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments as they are, and the constituent elements are modified without departing from the scope of the invention in the implementation stage. Can be materialized. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, you may delete some components of all the components shown by embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

2 is a block diagram illustrating a schematic configuration of an internal mechanism of the digital single-lens reflex camera according to the first embodiment of the present invention, in which (A) illustrates the internal configuration along the optical axis direction of the photographing lens, and (B) illustrates the camera body 200. FIG. It is a block diagram which shows the internal structure seen from the front direction. 1A and 1B are diagrams showing a shutter and a movable reflecting mirror of a digital single lens reflex camera according to a first embodiment of the present invention, wherein FIG. 1A is a perspective view of the shutter, FIG. 1B is a front view of the shutter, and FIG. FIG. 4D is a perspective view of the movable reflecting mirror, FIG. 4D is a diagram illustrating a mirror-down state of the movable reflecting mirror, and FIG. 5E is a diagram illustrating a mirror-up state of the movable reflecting mirror. It is a partial detail drawing of the shutter mirror drive unit of the digital single-lens reflex camera concerning 1st Embodiment of this invention. 2A and 2B are diagrams illustrating cam areas of the digital single-lens reflex camera according to the first embodiment of the present invention, in which FIG. 3A illustrates a shutter charge cam and FIG. 2B illustrates a cam area of a mirror charge cam. It is a development view of the cam area of the digital single-lens reflex camera according to the first embodiment of the present invention. 1 is a block diagram mainly showing an overall configuration of an electric system of a digital single-lens reflex camera according to a first embodiment of the present invention. It is a flowchart of the live view display mode of the digital single-lens reflex camera in 1st Embodiment of this invention. It is a flowchart of the live view initial setting of the digital single-lens reflex camera in 1st Embodiment of this invention. It is a flowchart of the automatic focus adjustment operation | movement of the digital single-lens reflex camera in 1st Embodiment of this invention. 3 is a flowchart of a photographing operation in a live view mode of the digital single lens reflex camera according to the first embodiment of the present invention. 3 is a flowchart of a photographing operation from a normal mode of the digital single lens reflex camera according to the first embodiment of the present invention. It is a timing chart in the live view display of the digital single-lens reflex camera in 1st Embodiment of this invention. It is a flowchart of the live view display of the digital single-lens reflex camera in 2nd Embodiment of this invention. It is a timing chart in the live view display of the digital single-lens reflex camera in 3rd Embodiment of this invention.

Explanation of symbols

21 ... Release button, 26 ... Liquid crystal monitor, 33 ... Viewfinder eyepiece, 100 ... Lens barrel, 101 ... Shooting lens, 102 ... Shooting lens, 103 ... Aperture , 107: Lens drive mechanism, 109 ... Aperture drive mechanism, 111 ... Lens CPU, 200 ... Camera body, 201 ... Movable reflection mirror, 203 ... Sub mirror, 205 ... Focusing Screen, 207... Pentaprism, 209. Eyepiece lens, 211... Photometric sensor, 213... Shutter, 213 a. Drive mechanism, 217 ... distance measuring circuit, 218 ... distance measuring unit, 219 ... mirror drive mechanism, 221 ... CCD, 223 ... CCD drive Circuit 225 CCD interface 227 Image processing circuit 229 Body CPU 231 Compression circuit 233 Flash memory control circuit 235 Flash memory 236 SDRAM control circuit 237 SDRAM, 239 input / output circuit 241, communication circuit 243 recording medium control circuit 245 recording medium 247 video signal output circuit 249 ... Liquid crystal monitor drive circuit, 253 ... Switch detection circuit, 255 ... Various switches, 261 ... Data bus, 271 ... ASIC, 300 ... Communication contact, 301 ... MS (Mirror shutter) motor, 303... Shutter / mirror drive unit, 305... Battery, 341. 3 ... Mirror drive spring, 345 ... Mirror down spring, 347 ... Engagement pin, 349 ... Position restriction pin, 351 ... Mirror charge lever, 353 ... Mirror charge cam, 353a ..Cam surface, 355 ... Shutter charge cam, 357 ... Cam gear, 361 ... Shutter charge lever, 363 ... Gear

Claims (7)

Imaging means capable of photographing the light flux from the photographing optical system;
A reflective member movable between an insertion state capable of reflecting the light beam from the photographing optical system and a retracted state retracted from the light beam from the photographing optical system;
A shutter disposed between the imaging means and the reflecting member;
A motor that drives the reflecting member and the shutter by forward and reverse rotation;
In a camera having
In the state where charging of the shutter is completed,
A first state in which the reflective member is disposed in the inserted state;
A camera having two types of states, the second state in which the reflecting member is disposed in the retracted state. When the shutter is fully charged, the reflecting member is
In normal shooting mode, it is in the first state,
The camera according to claim 1, wherein the camera is in the second state in the live view mode. Imaging means capable of photographing the light flux from the photographing optical system;
A reflective member movable between an insertion state capable of reflecting the light beam from the photographing optical system and a retracted state retracted from the light beam from the photographing optical system;
A shutter disposed between the imaging means and the reflecting member;
A driving mechanism capable of driving the reflecting member and the shutter;
In a camera having
A first driving state in which the reflecting member is operated in cooperation with the charging operation of the shutter and a second driving state in which the reflecting member is not operated during the charging operation of the shutter can be selected. Camera.   The camera according to claim 3, wherein the second driving state is selected when a live view mode is set. Imaging means capable of photographing the light flux from the photographing optical system;
A reflective member movable between an insertion state capable of reflecting the light beam from the photographing optical system and a retracted state retracted from the light beam from the photographing optical system;
A shutter disposed between the imaging means and the reflecting member;
A cam member that drives the reflecting member and the shutter by forward and reverse rotation;
In the camera comprising:
A first cam region for driving the reflecting member and the shutter;
A second cam region for driving only the shutter without driving the reflecting member;
A camera characterized by comprising the following. The cam member is driven by forward and reverse rotation of a motor connected to the cam member,
A first photographing mode for performing drive control in the first cam region;
A second shooting mode in which drive control is performed in the second cam region;
The camera according to claim 5, further comprising: The second shooting mode is a live view mode,
The camera according to claim 6, wherein the first shooting mode is a normal shooting mode other than the live view mode.