JP2011085762A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera which can suppress occurrence of ghost by luminous flux reflected on a back of a main mirror holding member without changing a mirror rotating mechanism. <P>SOLUTION: The camera (1) includes: an imaging part (70) capturing an image with subject light incident from a photographic optical system (2); a mirror member (21) moving between an observation position where it is arranged in an optical path linking the photographic optical system with the imaging part and an imaging position where it is arranged out of the optical path linking the photographic optical system and the imaging part; and a light shielding part (30) supported to freely turn between a first position and a second position, and pressed by the mirror member, when the mirror member moves from the observation position to the imaging position, to turn from the first position to the second position and intercept the subject light incident on the back side of the mirror member from the vicinity of an optical axis center of the photographic optical system. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a single-lens reflex camera.

  The single-lens reflex camera retracts the main mirror located between the photographing lens and the image pickup unit at the start of exposure from the optical axis (mirror up), and returns the main mirror to the original position again after the exposure (mirror down). A mirror rotating mechanism called a so-called quick return mirror is provided.

  In a camera equipped with such a mirror rotation mechanism, when a high-brightness subject such as a point light source is photographed, a ghost may occur due to the light beam reflected by the back surface of the main mirror holding member when the mirror is raised. Therefore, for the purpose of shielding an unnecessary light beam, measures such as making the tip of the main mirror holding member on the photographing lens side an edge shape are taken. In addition, by providing the position of the mirror rotation fulcrum on the rear end side of the mirror box, the camera that extends the tip position of the main mirror and moves the stop position of the main mirror holding member when the mirror is raised away from the center of the optical axis. It is known (see, for example, Patent Document 1).

JP-A-3-233546

  However, even if the tip portion of the main mirror holding member has an edge shape, it is difficult to make the tip portion have a uniform edge shape. For this reason, if the surface of the tip portion having an edge shape varies, a ghost may be generated by the light beam reflected by the tip portion. Further, in the camera of Patent Document 1, since the mirror rotation mechanism becomes large, the inertial force of the main mirror increases when mirror driving is performed at high speed. As a result, it is considered that each stop time at the time of mirror up and mirror down increases, so that it is not possible to cope with high-speed continuous shooting.

  The subject of this invention is providing the camera which can suppress generation | occurrence | production of the ghost by the light beam reflected by the back surface of the main mirror holding member, without changing a mirror rotating mechanism.

The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.
The invention according to claim 1 is an observation position arranged in an optical path connecting the imaging optical system and the imaging unit with an imaging unit (70) that captures an image of subject light incident from the imaging optical system (2). And a mirror member (21) that moves between an imaging position arranged outside the optical path connecting the imaging optical system and the imaging unit, and is rotatable between a first position and a second position. When the mirror member is supported and moved from the observation position to the imaging position, the mirror member rotates from the first position to the second position by pressing the mirror member, and the optical axis of the imaging optical system A camera (1) comprising: a light shielding portion (30) that shields subject light incident on the back side of the mirror member from near the center.
The invention according to claim 2 is the camera (1) according to claim 1, wherein the light shielding portion (30) is formed on the mirror member (21) from the vicinity of the optical axis center of the photographing optical system (2). A light shielding plate (31) for shielding subject light incident on the back side and a light shielding plate holding frame (32) for holding the light shielding plate, and when the mirror member moves from the observation position to the imaging position; The tip of the mirror member presses the light shielding plate holding frame to rotate the light shielding plate from the first position to the second position.
The invention according to claim 3 is the camera (1) according to claim 2, wherein the mirror member (21) is moved from the observation position to the imaging position, and the light-shielding portion (30) is the first position. When the mirror member is rotated from the position 1 to the second position, the tip of the mirror member stops on the back side of the light shielding portion that is opposite to the incident direction of the subject light.
The invention according to claim 4 is the camera (1) according to claim 2 or 3, wherein the light shielding plate holding frame (32) is movably supported in the optical axis direction of the photographing optical system (2). When moving from the first position to the second position when pressed by the tip of the mirror member (21), the mirror member (21) moves to the photographing optical system side and the light shielding plate (31) Inclined with respect to the optical axis.
The invention according to claim 5 is the camera (1) according to any one of claims 2 to 4, wherein the light shielding plate holding frame (32) is a pressing direction by the mirror member (21). When biased in the opposite direction and pressed by the mirror member at the first position, the mirror member rotates to the second position against the bias.
Note that the configuration described with reference numerals may be modified as appropriate, and at least a part of the configuration may be replaced with another component.

  According to the present invention, there is provided a camera capable of suppressing the occurrence of a ghost due to a light beam reflected on the back surface of a main mirror holding member without changing a mirror rotating mechanism.

It is sectional drawing of the camera concerning embodiment. It is explanatory drawing of the light-shielding part at the time of a mirror down. It is an external appearance perspective view of a light-shielding plate holding frame and a rotation mechanism. It is explanatory drawing of the light-shielding part at the time of mirror up.

  Hereinafter, embodiments of a camera according to the present invention will be described with reference to the drawings. Each figure shown below is provided with an XYZ orthogonal coordinate system for ease of explanation and understanding. In this coordinate system, the direction toward the left as viewed from the photographer at the camera position (hereinafter referred to as the normal position) when the photographer shoots a horizontally long image with the optical axis A horizontal is defined as the X plus direction. Further, the direction toward the upper side in the normal position is defined as the Y plus direction. Further, the direction toward the subject at the normal position is taken as the Z direction.

FIG. 1 is a cross-sectional view of a camera 1 according to the present embodiment. FIG. 1 is a cross-sectional view when the camera 1 is divided vertically along the optical axis A. FIG.
The camera 1 is configured as a digital single lens reflex camera. As shown in FIG. 1, the camera 1 includes a camera body 10, a mirror mechanism unit 20, a light shielding unit 30, a finder unit 40, an AF module 50, a shutter unit 60, and an imaging unit 70.

  The camera body 10 is a main frame that fixes each part of the camera 1. The camera body 10 includes a mirror chamber 10a in which the mirror mechanism unit 20 is disposed. The image display unit 11 is a liquid crystal display provided on the back side of the camera 1 and displays an image (reproduced image, through image) captured by the imaging unit 70, information related to an operation, and the like. The mount part 12 is a part to which a photographing lens (not shown) is detachably attached. The photographing lens is a photographing optical system including a lens group that forms an image of incident subject light on the light receiving surface of the imaging unit 70. The sponge 13 is a buffer member for preventing the main mirror holding frame 21 bounced upward when the mirror is raised, which will be described later.

  The mirror mechanism unit 20 includes a main mirror holding frame 21 and a sub mirror holding frame 22. The mirror mechanism unit 20 is provided at a position where subject light emitted from a photographing lens (not shown) enters. The mirror mechanism unit 20 includes a mirror down position (observation position) in which the main mirror 23 is disposed in an optical path connecting an imaging lens (not shown) and the imaging unit 70, and an outside optical path connecting the imaging lens and the imaging unit 70. It is a mechanism to move between the mirror up position (imaging position) arranged in the. The configuration of the mirror mechanism unit 20 in this embodiment is the same as the conventional one.

  The main mirror holding frame 21 is a mirror member that includes a main mirror 23. The main mirror 23 is a reflection mirror that reflects subject light to the finder unit 40. The main mirror holding frame 21 is rotatably supported by the main support shaft 25. The main support shaft 25 is provided with a return spring (not shown) made of a coil spring or the like.

  The main mirror holding frame 21 is urged counterclockwise about the main support shaft 25 by the return spring. The main mirror holding frame 21 springs up against the urging force of the return spring when the mirror is up, and is pushed back downward by the urging force of the return spring when the mirror is down. The tip of the main mirror holding frame 21 on the side of the main mirror 23 presses a light shielding plate holding frame 32 of the light shielding unit 30 described later upward when the mirror is raised. Hereinafter, the main mirror 23 side of the main mirror holding frame 21 is referred to as “front side”, and the opposite side is referred to as “back side”.

  The reflecting surface of the main mirror 23 is provided with a semi-transmissive mirror (not shown) that transmits part of the subject light. Part of the subject light transmitted through the semi-transmissive mirror is incident on the sub-mirror 24 provided at the rear part thereof.

  The sub mirror holding frame 22 includes a sub mirror 24. The sub mirror 24 is a reflecting mirror that reflects the subject light transmitted through the semi-transmissive mirror of the main mirror 23 obliquely downward and guides it to the AF module 50. The sub mirror holding frame 22 is rotatably attached to the main mirror holding frame 21 by a sub spindle 26. The sub spindle 26 is provided with a return spring (not shown) such as a toggle spring. The sub mirror holding frame 22 is urged clockwise or counterclockwise about the sub spindle 26 by the return spring.

  That is, when the mirror is raised, the sub mirror holding frame 22 is urged clockwise when the angle with respect to the main mirror holding frame 21 is less than a predetermined angle, and rotates to a position where it overlaps with the main mirror holding frame 21 as shown in FIG. To do. Further, when the angle with respect to the main mirror holding frame 21 becomes equal to or larger than a predetermined angle when the mirror is down, it is urged counterclockwise and rotates to a position away from the main mirror holding frame 21 as shown in FIG.

  The light shielding unit 30 is supported so as to be rotatable between a first position shown in FIG. 4 to be described later and a second position shown in FIG. Then, when the mirror is raised, the main mirror holding frame 21 is pressed to rotate from the first position to the second position, and as shown in FIG. 4, the main mirror is held from around the center of the optical axis A of the photographing lens 2. The subject light incident on the back side of the frame 21 is shielded. The configuration of the light shielding unit 30 will be described later.

  The finder unit 40 includes a finder screen 41, a penta roof prism 42, and an eyepiece unit 43. The finder screen 41 is a screen for forming an image by entering subject light reflected when the mirror mechanism unit 20 is in the mirror down position. The penta roof prism 42 is a polygonal prism that emits an image formed by subject light imaged on the finder screen 41 when the mirror is down, and emits it to the eyepiece 43. The eyepiece 43 is an eyepiece optical system arranged at a position where the subject light emitted from the penta roof prism 42 enters. The photographer can enlarge and observe the image of the subject light at the eyepiece 43.

  The AF module 50 is a sensor that receives the object light reflected by the sub mirror 24 and detects distance measurement information for focus adjustment. The shutter unit 60 is disposed behind the mirror mechanism unit 20. The shutter unit 60 receives subject light when the mirror mechanism unit 20 is at the photographing position (mirror up position). The shutter unit 60 includes a plurality of shutter blade groups (not shown), opens and closes the shutter blade groups according to a shooting instruction by a release switch (not shown), and makes subject light incident on the imaging unit 70.

  The imaging unit 70 is provided at a position where subject light that has passed through the shutter unit 60 enters. The imaging unit 70 includes a low-pass filter 71 and an imaging element 72. The image sensor 72 captures an image of subject light incident through the low-pass filter 71 on the light receiving surface, converts the image into an electrical image signal, and outputs the electrical image signal to an image processing unit (not shown).

  Next, the configuration of the light shielding unit 30 will be described. FIG. 2 is an explanatory diagram of the light shielding unit 30 when the mirror is down. FIG. 3 is an external perspective view of the light shielding plate holding frame and the rotation mechanism. FIG. 4 is an explanatory diagram of the light shielding unit 30 when the mirror is raised. In FIGS. 2 and 4, reference numeral 2 schematically represents the photographing lens.

  As shown in FIG. 2, the light shielding unit 30 includes a light shielding plate 31 and a light shielding plate holding frame 32. The light shielding plate 31 includes a light shielding member 31a that shields subject light incident on the back side of the main mirror holding frame 21, and a light shielding member holding plate 31b for holding the light shielding member 31a. The light shielding member 31a is made of a thin seed material such as a flocked paper or a light shielding sheet, and is attached to the light shielding member holding plate 31b. The light shielding member holding plate 31 b is attached to the front surface of the light shielding plate holding frame 32.

  Next, the configuration of the light shielding plate holding frame 32 and the rotation mechanism will be described with reference to FIG. In addition, since the structure in the both ends of the longitudinal direction of the light-shielding plate holding frame 32 becomes symmetrical across the optical axis A, only the front side in the figure will be described, and the reference and description of the configuration on the back side in the figure will be omitted.

  As shown in FIG. 3, the light shielding plate holding frame 32 is configured by a metal plate formed in a substantially U shape. The light shielding plate holding frame 32 has rotating arm portions 33 at both ends in the longitudinal direction. The rotating arm portion 33 includes a light shielding plate attachment portion 34, a frame side surface portion 35, and a mirror press receiving portion 37. The light shielding plate attaching portion 34 is a portion for attaching the light shielding plate 31 (FIG. 2). The light shielding plate 31 is attached to the light shielding plate attachment portion 34 by bonding or screwing. The frame side surface portion 35 includes a long hole 36. The long hole 36 is a hole that engages with the fixed shaft 14 of the camera body 10 to be described later. The mirror pressing receiving portion 37 is a portion that is pressed by the tip end portion of the main mirror holding frame 21 when the mirror is raised. The mirror pressing receiving portion 37 includes a spring receiving shaft 38.

  The camera body 10 (FIG. 2) includes a fixed shaft 14 and a spring receiving shaft 15 on both sides in the X direction of the mirror chamber 10a. The fixed shaft 14 is an axis around which the light shielding unit 30 is turned. The fixed shaft 14 engages with the long hole 36 of the light shielding plate holding frame 32. A return spring 16 is attached to the fixed shaft 14. The return spring 16 is a spring for urging the light-shielding plate holding frame 32 clockwise about the fixed shaft 14 (FIG. 2). A lower portion of the return spring 16 is slidably engaged with a spring receiving shaft 38 of the mirror pressing receiving portion 37. Further, the upper part of the return spring 16 is rotatably engaged with the spring receiving shaft 15 of the camera body 10.

  As shown in FIG. 2, the light shielding plate holding frame 32 comes into contact with the fixed shaft 14 as shown in FIG. 2 when the mirror is down and does not come into contact with the main mirror holding frame 21 due to the urging force of the return spring 16. Lock in state. Thereby, the light-shielding plate 31 attached to the light-shielding plate holding frame 32 becomes a position substantially orthogonal to the optical axis A (first position). Further, since the light-shielding plate holding frame 32 is constantly urged by the return spring 16, it is possible to prevent looseness due to vibration or the like when the mirror is not in contact with the main mirror holding frame 21.

  Depending on the focal length of the photographing lens 2 and the height of the light shielding plate 31 (Y direction), the light beam B incident from the periphery of the photographing lens 2 may be shielded by the light shielding plate 31 as shown in FIG. is there. However, at the mirror-down position shown in FIG. 2, the appearance of the image by the subject light observed by the photographer from the eyepiece 43 is not greatly affected.

  Next, the operation of the light shielding unit 30 configured as described above will be described. When the shutter button (not shown) is operated by the photographer at the mirror down position shown in FIG. 2, the mirror mechanism unit 20 is driven, and as shown in FIG. 4, the main mirror 23 and the sub mirror 24 are moved upward by the mirror up. Jumps up and retreats from the optical axis A (optical path).

  In the middle of this mirror up, the tip of the main mirror holding frame 21 first comes into contact with the sponge 13. Thereafter, the front end portion of the main mirror holding frame 21 abuts on the mirror press receiving portion 37 of the light shielding plate holding frame 32 to press the mirror press receiving portion 37 upward. The mirror pressing receiving portion 37 is lifted upward against the urging force of the return spring 16 when pressed upward by the main mirror holding frame 21. At this time, since the elongate hole 36 of the light shielding plate holding frame 32 is restricted from moving upward by the fixed shaft 14, the elongate hole 36 is relatively forward with respect to the fixed shaft 14 of the camera body 10 (Z plus direction). ) That is, the light shielding plate holding frame 32 moves forward with respect to the fixed shaft 14.

  When the mirror pressing receiving portion 37 is further pressed upward by the main mirror holding frame 21 and reaches a position where the rear end portion of the elongated hole 36 and the fixed shaft 14 come into contact with each other, the light shielding plate holding frame 32 is fixed to the fixed shaft 14. It rotates counterclockwise around the center. Thereby, the light shielding plate 31 attached to the light shielding plate holding frame 32 is in a position inclined with respect to the optical axis A (second position). In other words, when the mirror is raised, the light shielding plate holding frame 32 moves forward with respect to the fixed shaft 14 and rotates counterclockwise about the fixed shaft 14. As shown in FIG. 4, the light shielding plate holding frame 32 stops at a position where the light shielding plate 31 is inclined with respect to the optical axis A. At this time, the front end of the main mirror holding frame 21 stops on the back side of the light shielding plate 31 that is opposite to the incident direction of the subject light.

  When the shutter unit 60 is opened in this state, the incident subject light is guided to the imaging unit 70 and an image of the subject light is captured. At this time, as shown in FIG. 4, the light beam C incident on the back side of the main mirror holding frame 21 from the vicinity of the center of the optical axis A of the photographing lens 2 is shielded by the inclined light shielding plate 31. A dashed line shown in FIG. 4 is a light beam that is reflected by the tip portion on the back side of the main mirror holding frame 21 when the light shielding plate 31 is not provided. When this light beam enters the imaging unit 70 during imaging, a ghost appears in the image. However, according to the present embodiment, since the light beam C incident on the back surface side of the main mirror holding frame 21 from the vicinity of the center of the optical axis A of the photographing lens 2 is shielded by the light shielding plate 31, it is possible to suppress the occurrence of ghost. it can. On the other hand, the light beam B and the light beam D incident from the periphery of the photographing lens 2 are incident on the imaging unit 70 without being shielded by the light shielding plate 31. A light beam D indicates a light beam incident from the outermost peripheral portion of the photographing lens 2.

  When the shutter unit 60 is closed and imaging by the imaging unit 70 is completed, the mirror mechanism unit 20 is driven again, and the main mirror 23 and the sub mirror 24 are mirrored down and pushed back downward, as shown in FIG. It is arranged on the optical axis A. As a result, the mirror pressing receiving portion 37 of the light shielding plate holding frame 32 is released from being pressed by the tip portion of the main mirror holding frame 21. At this time, the light-shielding plate holding frame 32 rotates clockwise around the fixed shaft 14, and the elongated hole 36 is relatively rearward relative to the fixed shaft 14 of the camera body 10 by the biasing force of the return spring 16 ( (Z minus direction). That is, the light shielding plate holding frame 32 moves rearward with respect to the fixed shaft 14.

  When reaching the position where the tip of the long hole 36 and the fixed shaft 14 come into contact with each other, the light shielding plate 31 attached to the light shielding plate holding frame 32 is in a position substantially orthogonal to the optical axis A (first position). That is, when the mirror is down, the light shielding plate holding frame 32 moves rearward with respect to the fixed shaft 14 and rotates clockwise about the fixed shaft 14. As shown in FIG. 2, the light shielding plate holding frame 32 stops at a position where the light shielding plate 31 is substantially orthogonal to the optical axis A.

According to embodiment mentioned above, there exist the following effects.
(1) When the mirror is raised, the light shielding portion 30 is rotated from the first position shown in FIG. 2 to the second position shown in FIG. Since the subject light incident on the back surface side is shielded, it is possible to suppress the occurrence of ghost due to the light beam reflected by the back surface of the main mirror holding frame 21.
(2) Since the mirror mechanism unit 20 can have the same configuration as the conventional one, it is not necessary to enlarge the mirror rotation mechanism as in the above-described camera of Patent Document 1. According to this, the inertia force of the main mirror 23 is not increased, and the respective stop times at the time of mirror up and mirror down are not increased, so that it is possible to sufficiently cope with high-speed continuous shooting. .
(3) Since the mirror mechanism portion 20 can have the same configuration as the conventional one, processing such as making the tip portion of the main mirror holding frame 21 into an edge shape becomes unnecessary, and the cost increase of the mirror mechanism portion 20 can be suppressed. it can. Further, unlike the case where the front end portion of the main mirror holding frame 21 has an edge shape, there is no problem that the light beam reflected at the front end portion becomes a ghost due to the variation in the surface thereof.
(4) Since the light shielding unit 30 is rotated by pressing the main mirror holding frame 21, a dedicated power source for rotating the light shielding unit 30 is not necessary. For this reason, an increase in cost can be suppressed.
(5) When the mirror is raised, the front end of the main mirror holding frame 21 stops on the back side of the light shielding plate 31, so that the light beam C incident from the vicinity of the center of the optical axis A of the photographing lens 2 It is possible to reliably prevent reflection.
(6) When the mirror is raised, the main mirror holding frame 21 moves forward (Z plus direction), and the light shielding plate 31 is inclined with respect to the optical axis A, so that the light beam incident from the periphery of the photographing lens 2 is shielded. Therefore, only the light beam incident from the vicinity of the center of the optical axis A of the photographing lens 2 can be shielded. According to this, in an imaging lens with a short focal length in particular, it is possible to effectively shield only an unnecessary light beam incident from the vicinity of the optical axis center without affecting the light beam incident from the peripheral portion. Incidentally, when the front end portion of the main mirror holding frame 21 is formed like the light shielding plate 31, there is a possibility that the light beam incident from the peripheral portion of the photographing lens 2 may be shielded when the mirror is raised. Moreover, since the mass of the front-end | tip part of the main mirror holding frame 21 increases, the inertia force of the main mirror 23 will be increased. However, according to the present embodiment, there is no need to add a new member to the main mirror holding frame 21, so that the above-described problem does not occur.
(7) The light shielding plate holding frame 32 is urged by the return spring 16 in the direction opposite to the pressing direction of the main mirror holding frame 21. For this reason, the light-shielding part 30 does not move due to vibration or the like when the mirror is not in contact with the main mirror holding frame 21. Further, the inertial force generated at the tip of the main mirror holding frame 21 during mirror up is attenuated by the urging force of the return spring 16 when it comes into contact with the light shielding plate holding frame 32. For this reason, the bounce of the main mirror holding frame 21 can be reduced.
(8) Since the rotation range of the light shielding plate 31 is smaller than the rotation range of the main mirror holding frame 21, the light shielding member 31a is unlikely to peel off due to high-speed continuous shooting or long-term use. Incidentally, when flocking paper or the like is attached to the tip of the main mirror holding frame 21, the inertial force increases due to the large rotation range of the main mirror holding frame 21, which may be peeled off during operation. However, since the light shielding plate 31 of the present embodiment has a small rotation range, the inertial force is also small, so that it is difficult to cause peeling during operation.
(9) The mirror pressing receiving portion 37 of the light shielding plate holding frame 32 is in contact with the surface side of the tip portion of the main mirror holding frame 21. For this reason, even if the coating on the surface side of the front end portion of the main mirror holding frame 21 is peeled off by sliding between the mirror pressing receiving portion 37 and the main mirror holding frame 21, the sliding of the main mirror holding frame 21 is performed when the mirror is raised. Since the moving surface is housed on the finder screen 41 side, the moving surface is not affected by stray light due to reflection of the part where the paint is peeled off.
(Deformation)

Without being limited to the embodiment described above, the present invention can be variously modified and changed as described below, and these are also within the scope of the present invention.
(1) In this embodiment, although the example which formed the long hole 36 in the light-shielding plate holding frame 32 was shown, not only this but a round hole may be sufficient. However, the light shielding plate holding frame 32 can be moved further forward (Z plus direction) by using a long hole.
(2) In the present embodiment, an example in which the return springs 16 are provided at both ends of the light shielding plate holding frame 32 has been described.
(3) In this embodiment, an example in which the present invention is applied to a digital single-lens reflex camera has been described. However, the present invention is not limited to this, and can be applied to, for example, a film type single-lens reflex camera.

  Moreover, although the said embodiment and modification can be used in combination suitably, since the structure of each embodiment is clear by illustration and description, detailed description is abbreviate | omitted. Furthermore, the present invention is not limited by the embodiment described above.

  1: camera, 2: photographing lens, 10: camera body, 13: sponge, 14: fixed shaft, 15: spring bearing shaft, 16: return spring, 20: mirror mechanism, 21: main mirror holding frame, 23: main Mirror, 30: light shielding portion, 31: light shielding plate, 31a: light shielding member, 31b: light shielding member holding plate, 32: light shielding plate holding frame, 33: rotating arm portion, 34: light shielding plate mounting portion, 35: frame side surface portion , 36: long hole, 37: mirror pressing receiving portion, 38: spring receiving shaft

Claims (5)

An imaging unit that captures an image of subject light incident from the imaging optical system;
A mirror member that moves between an observation position arranged in an optical path connecting the imaging optical system and the imaging unit and an imaging position arranged outside the optical path connecting the imaging optical system and the imaging unit;
When the mirror member is moved from the observation position to the imaging position, it is supported from the first position by the pressing of the mirror member when the mirror member is moved between the first position and the second position. A light shielding portion that rotates to a second position and shields subject light incident on the back side of the mirror member from near the optical axis center of the photographing optical system;
A camera comprising: The camera according to claim 1,
The light shielding portion includes a light shielding plate that shields subject light incident on the back side of the mirror member from near the optical axis center of the photographing optical system, and a light shielding plate holding frame that holds the light shielding plate, and the mirror member Is moved from the observation position to the imaging position, the tip of the mirror member presses the light shielding plate holding frame to rotate the light shielding plate from the first position to the second position. A camera characterized by that. The camera according to claim 2,
When the mirror member moves from the observation position to the imaging position and the light-shielding portion rotates from the first position to the second position, the tip of the mirror member A camera which stops on the back side of the light shielding portion which is opposite to the incident direction. The camera according to claim 2 or 3,
The light shielding plate holding frame is supported so as to be movable in the optical axis direction of the photographing optical system, and is pressed by the tip of the mirror member to rotate from the first position to the second position. A camera which moves to the photographing optical system side and in which the light shielding plate is inclined with respect to the optical axis. The camera according to any one of claims 2 to 4,
The light-shielding plate holding frame is biased in a direction opposite to the pressing direction by the mirror member, and when pressed against the mirror member at the first position, the second position against the biasing. A camera characterized by rotating in the direction.

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