JP6668946B2 - Camera accessories - Google Patents

Description

  The present invention relates to a camera accessory that can be attached to and detached from a camera body via a mount or the like. The camera accessory particularly refers to an interchangeable lens, an intermediate adapter having no lens optical system interposed between the interchangeable lens and the camera body, or an intermediate adapter having a lens optical system.

  Conventionally, in camera accessories that can be attached to and detached from the camera body via a mount, etc., camera accessory technology that can communicate with the camera body specific information corresponding to the shooting lens for forming the subject light on the imaging surface of the camera body It has been disclosed.

  The unique information communicated between the camera body and the camera accessory includes identification data (such as a model-specific ID and a serial number) of the photographing lens arbitrarily set in advance and optical data such as a focal length and an aperture value of the photographing lens. And data relating to the optical characteristics of the photographing lens in addition to driving data for driving and controlling the photographing lens.

  Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-341424) discloses that in a camera system in which an intermediate accessory is interposed between a camera body and an interchangeable lens, when unique information is communicated from the interchangeable lens to the camera body, A technique is disclosed in which, when both the camera body and the interchangeable lens are of a new function type, a control method for correcting the unique information of the intermediate accessory is switched.

  On the other hand, camera accessories such as interchangeable lenses and intermediate accessories are generally detachable from the camera body via a mount mechanism. The user selects camera accessories that match the specifications of the mounting mechanism of the camera body, and attaches these camera accessories to the camera body according to the shooting scene.

  In this case, the user can mount the camera body and the camera accessory that match the specifications of the mounting mechanism, so that the entire camera system including the camera body and the camera accessory can fully demonstrate its function. There is a risk of being mistaken.

  As disclosed in Patent Document 1, a camera body, a camera accessory, and a camera system including the camera body are becoming more sophisticated, and if all of them do not correspond to new functions, the latest functions are provided. It may not be able to fully demonstrate.

  However, since the user first mechanically selects a camera accessory that can be mounted on the camera body, there is a possibility that the user may erroneously recognize the corresponding status of the function. In addition, many combinations of the camera body and the camera accessory are assumed, and these firmwares may be changed later, and a user's combination of the camera body and the camera accessory changes the correspondence status of detailed functions. Even if it is recognized that it is not easy to immediately understand the detailed contents of the corresponding situation.

  In addition, if the specifications of the mounting mechanism match the camera body, it will be possible to attach third-party camera accessories, but the camera body manufacturer will support detailed functions in combination with the camera body and third-party camera accessories The user may not be able to easily grasp the situation without grasping the situation.

  Therefore, there is a need for a notification function that allows a user of the camera body, the camera accessory, and the camera system to easily recognize the correspondence status of the detailed functions.

  Various existing devices may be used to implement the notification function in the camera accessory. One of the specific examples of enabling more reliable notification is to display characters on a liquid crystal device.However, mounting a liquid crystal device on a camera accessory only to notify the detailed status of function support is expensive. However, since the camera accessory has a cylindrical shape according to the shape of the lens optical system of the photographing lens, it is difficult to arrange the liquid crystal device on the curved surface of the surface.

  Therefore, it is more efficient to implement the notification function using a light emitting device such as an LED. For example, in the case of an LED having a built-in IC, it is possible to emit various luminescent colors according to the balance of the three primary colors of light, thereby visually notifying a user of a plurality of correspondence states. And the compact size makes it convenient for mounting on camera accessories.

JP 2012-220654 A

  However, there are the following problems when mounting a light emitting device such as an LED on a camera accessory.

  First, there is a problem that it is difficult to secure a sufficient space for mounting a new light emitting device on a camera accessory.

  In the first place, the camera accessory has many user interfaces such as manual operation rings and changeover switches, and portability is one of the important functions. There are big restrictions.

  In addition, most camera accessories have a curved surface, and the degree of freedom in installing a light emitting device is not high.

  Further, it is necessary to mount the light emitting device so that environmental light does not enter the inside of the camera accessory through a through hole for passing light from the light emitting device from the inside to the outside of the camera accessory.

  If external light enters the inside of the camera accessory, harmful external light will enter the optical path of the photographing lens, and a ghost or flare problem may occur in a photographed image or a live view.

  If the light-emitting device is configured to be separated from the optical path by the taking lens and from the wall, the problem of external light entering the camera accessory will not occur, but in the camera accessory, the diameter is restricted by maintaining portability. Therefore, such a configuration cannot be easily achieved.

  An object of the present invention is to implement a notification function for notifying a user of a corresponding state of a detailed function by mounting a light emitting device, and further, maintain portability, and transmit light of the light emitting device from inside to outside. It is an object of the present invention to provide a camera accessory configured so that external light does not enter the optical path of the taking lens from a through hole for passing through.

  In order to solve the above-described problems, a camera accessory according to the present invention is a camera accessory that can be mechanically and electrically attached to a camera body by a mounting mechanism, and is provided to notify a user of a corresponding status of a function. A light emitting unit that emits light, a light emission control unit that controls light emission of the light emitting unit, a printed circuit board on which the light emitting unit is mounted and electrically connects the light emitting unit and the light emission control unit, and a light-transmitting synthetic resin Comprising a prism, wherein the prism covers the light-emitting portion and is in close contact with the printed circuit board, an emission surface that covers an optical opening formed in an external member and is in close contact with the external member, A reflection surface that changes the direction of light emitted in a direction parallel to the optical axis of light emitted from the light emitting unit is formed, and a portion of the incident surface that covers the light emitting unit and the appearance member of the emission surface form The surface other than the portion covering the optical opening that is characterized in that it is provided with the light shielding member preventing light leakage.

  ADVANTAGE OF THE INVENTION According to this invention, the notification function which notifies a user of the correspondence situation of a detailed function is mounted by mounting a light emitting device, and the camera accessory which does not impair portability and does not invade external light into the optical path of a photographic lens is implemented. Becomes possible.

Block diagram showing the configuration of the camera system Flow chart illustrating light emission control of camera accessory Perspective view of mount conversion adapter Top view showing cross-section line of mount conversion adapter Enlarged sectional view of mount conversion adapter Perspective view showing a single reflection member

  Hereinafter, as an embodiment of the camera accessory of the present invention, a mount conversion adapter which is an intermediate accessory interposed between a camera body and an interchangeable lens in a camera system will be described in detail. The following description of the embodiment is an example of the camera accessory of the present invention, and the camera accessory of the present invention is intended for a detachable camera body through a mount or the like. It is not limited to a conversion adapter.

  A configuration of a camera system including a camera body, an interchangeable lens, and a mount conversion adapter according to the present embodiment will be described.

  FIG. 1 is a block diagram illustrating the configuration of the camera system according to the present embodiment. In FIG. 1, reference numeral 10 denotes a camera body, 20 denotes an interchangeable lens, and 30 denotes a mount conversion adapter. The camera body 10, the interchangeable lens 20, and the mount conversion adapter 30 are integrated to form a camera system.

  The connection between the camera body 10 and the mount conversion adapter 30 and the connection between the interchangeable lens and the mount conversion adapter 30 are mechanically connected by mount mechanisms whose specifications match each other. Depending on the intended function of the mount conversion adapter, the specifications of the mount mechanism between the two may be common or different. If the specifications of the mounting mechanism match between the two parts, such as between the camera body 10 and the mount conversion adapter 30, both can be mounted. There is no mechanical problem if the camera system can be configured even when the specifications of the mount mechanism are different between the two sides.

  In the camera body 10 shown in FIG. 1, 101 is a camera CPU, 102 is an imaging unit, 103 is an image processing unit, 104 is a power supply unit, and 105 is a camera mount unit.

  The camera CPU 101 performs control for acquiring image data and controls each device in the camera body 10, and also performs communication control and drive control with the interchangeable lens 20 and the mount conversion adapter 30 mounted on the camera body 10. .

  The imaging unit 102 includes an image sensor for photoelectrically converting subject light formed by a photographing lens to obtain image data, an A / D converter for digitizing the obtained image data, and the like. It is responsible for acquiring image data.

  The image processing unit 103 performs gradation processing, noise removal processing, optical aberration correction processing, and the like of the image data acquired by the imaging unit 102.

  The power supply unit 104 supplies power to each device in the camera body 10, and further supplies power to each device of the interchangeable lens 20 and the mount conversion adapter 30 mounted via the camera mount unit 105.

  The camera mount unit 105 has a mount mechanism whose specification matches the mount conversion adapter 30. The camera mount unit 105 can mechanically mount the mount conversion adapter 30 on the camera body 10, and the electrical contacts provided on the mount mechanism. Thus, communication with the mount conversion adapter 30 is possible.

  In the interchangeable lens 20 shown in FIG. 1, reference numeral 201 denotes a lens CPU, 202 denotes a lens optical system, 203 denotes a lens ROM, and 204 denotes a lens mount.

  The lens CPU 201 controls each device in the interchangeable lens 20 and performs communication control and drive control with the camera body 10 and the mount conversion adapter 30 mounted on the interchangeable lens 20.

  The lens ROM 203 stores lens data unique to the lens optical system 202 of the interchangeable lens 20. The lens data includes identification data such as a model ID and a serial number, optical data such as a focal length and an aperture value of the lens optical system 202, and drive data for driving an interchangeable lens. Optical correction data for correcting aberration in image processing is included.

  The lens mount unit 204 has a mount mechanism whose specifications match with the mount conversion adapter 30, enables the interchangeable lens 20 to be mechanically mounted on the mount conversion adapter 30, and has an electrical contact provided on the mount mechanism. Thus, communication with the mount conversion adapter 30 is possible.

  In the mount conversion adapter 30 shown in FIG. 1, reference numeral 301 denotes an adapter CPU, 302 denotes an adapter ROM, 303 denotes a light emitting section, 304 denotes an adapter camera side mount section, and 305 denotes an adapter lens side mount section.

  The mount conversion adapter 30 of the present embodiment is a camera accessory that allows the camera body 10 and the interchangeable lens 20 having different specifications of the mount mechanism to be mounted, and relays them. The role of the mount conversion adapter 30 is to enable the interchangeable lens 20 to be mechanically attachable to the camera body 10 irrespective of whether the specifications of the mount mechanism of the camera body 10 and the interchangeable lens 20 are different, Supporting communication compatibility between the main body 10 and the interchangeable lens 20 and adjusting the flange back of the interchangeable lens 20 in accordance with the specifications of the camera main body 10 to be mounted can be cited.

  The adapter CPU 301 performs a process including replacement and conversion of commands and data communicated between the camera CPU 101 and the interchangeable lens 20 in order to ensure compatibility of communication between the camera CPU 101 and the lens CPU 201. In addition, based on data communicated between the camera CPU 101 and the lens CPU 201, the light emitting unit 303 for notifying the user of the corresponding status of the function of the mount conversion adapter 30 is appropriately controlled.

  The adapter ROM 302 stores the same lens data unique to the lens optical system 202 stored in the lens ROM 203 of the interchangeable lens 20. The lens data stored in the adapter ROM 302 is lens data that includes a lens ID and that can support more advanced functions than similar lens data stored in the lens ROM 203. That is, in addition to the lens data stored in the lens ROM 203, the lens data stored in the adapter CPU 302 includes, for example, more advanced optical aberration correction data and image data which is a new function of the imaging unit 102 of the camera body 10. Optical aberration correction data compatible with the surface phase difference AF has been extended.

  Here, the mount conversion adapter 30 can be mounted with various interchangeable lenses that match the specifications of the mount mechanism, and the lens optical system is changed by the mounted interchangeable lenses. It is possible to store one or a plurality of lens data assuming a lens optical system of an interchangeable lens that may have a possibility.

  It is preferable that the lens data stored in the adapter ROM 302 can be changed later according to the situation. Specific examples of such situations include deleting unused lens data when securing the storage capacity of the adapter ROM 302 or adding lens data corresponding to the lens optical system of a newly developed interchangeable lens. is assumed. As a method of changing the lens data stored in the adapter ROM 302, a change using an electrical contact of the mount unit or a change using a dedicated connector for changing the lens data can be performed by an external computer or a camera body. It is.

  The adapter ROM 302 can store a plurality of extended lens data, so that the interchangeable lens 20 that can be mounted on the mount conversion adapter 30 can support more advanced optical aberration correction and new functions of the camera body 10. A plurality of interchangeable lenses 20 can correspond to a new function by simply updating the lens data in the adapter ROM 302 of the mount conversion adapter 30 without individually updating the lens data stored in the lens ROM 203 of the interchangeable lens 20 It can be.

  The light emitting unit 303 is a light emitting device for notifying the user of the status of the function of the mount conversion adapter 30. In this embodiment, the light emitting device of the light emitting unit 303 is specifically an LED. The LEDs are packaged with LEDs that emit light of the three primary colors and ICs that control the light emission, and can emit light of various colors in a small space. In the present embodiment, the user is notified of the corresponding status of the functions of the mount conversion adapter 30 using a plurality of light emission states of the LEDs.

  Next, the light emission control of the light emitting unit 303 by the adapter CPU 301 will be described with reference to FIG.

  In the camera system of the present embodiment, when the power of the camera body 10 is turned on, the power supply unit 104 of the camera body 10 sends the camera CPU 101 of the camera body 10, the lens CPU 201 of the interchangeable lens 20, and the adapter CPU 301 of the mount conversion adapter 30. Supply of power of an appropriate voltage to each CPU is started. These CPUs are activated by receiving power supply, and perform the next initial communication.

  First, in step 1, the adapter CPU 301 instructs the camera CPU 101 to wait for communication. This is because the communication between the adapter CPU 301 and the camera CPU 101 waits until the adapter CPU 301 determines the type of the interchangeable lens 20 in the initial communication and completes the light emission control of the light emitting unit 303.

  Next, in step 2, the adapter CPU 301 inquires of the lens CPU 201 whether or not lens data on the lens optical system 202 of the mounted interchangeable lens 20 can be stored in the adapter ROM 302 of the mount conversion adapter 30. A command (corresponding command) and a command (lens ID command) for inquiring about the lens ID stored in the lens ROM 203 of the interchangeable lens 20 are issued.

  The corresponding command is a command for inquiring the lens CPU 201 whether or not the adapter ROM 302 can store lens data of the lens optical system 202 of the interchangeable lens 20 mounted on the mount conversion adapter 30. When issuing the corresponding command, it does not matter whether or not the lens data of the lens optical system 202 of the interchangeable lens 20 is actually stored in the adapter ROM 302.

  The lens data stored in the adapter ROM 302 is created based on the lens design data of the lens optical system 202, and must be described according to a predetermined format, and simply conforms to the specifications of the mount mechanism. Therefore, even an interchangeable lens that can be mechanically mounted cannot always store lens data of the interchangeable lens. For example, even if the interchangeable lens 20 is mechanically attachable to the mount conversion adapter 30, the manufacturer of the mount conversion adapter 30 cannot create lens data based on the lens design data. In the case of an interchangeable lens manufactured by another company having a lens optical system, it is basically impossible to store lens data of these interchangeable lenses in the adapter ROM 302 of the mount conversion adapter 30.

  Next, in step 3, the lens CPU 201 responds to the corresponding command and the lens ID command from the adapter CPU 301, and instructs the adapter CPU 301 to respond to the mount conversion adapter 30 and the lens ID stored in the lens ROM 203. Send

  Next, in step 4, the adapter CPU 301 receives the status of correspondence with the mount conversion adapter 30 and the lens ID transmitted from the lens CPU 201, and controls the light emission of the light emitting unit 303 based on these. That is, when the status of correspondence with the mount conversion adapter 30 is OK, light emission control for turning on the light emitting unit 303 is performed, and when it is NG, light emission control for turning off the light emitting unit 303 is performed. Further, in light emission control for lighting the light emitting unit 303, light emission control for switching the light emission color according to the lens ID is performed.

  In the present embodiment, when the support status for the mount conversion adapter 30 is OK, the light emission control for turning on the light emitting unit 303 is performed, and the light emission control for switching the light emission color according to the lens ID is performed. That is, the adapter CPU 301 refers to the adapter ROM 302 storing one or more lens data using the lens ID received from the lens CPU 201 as a key when performing light emission control for turning on the light emitting unit 303, and receives from the lens CPU 201. A search is performed to determine whether or not the same lens ID as the selected lens ID exists. If the lens ID exists, the light emitting unit 303 emits green light, and if not, the light emitting unit 303 emits orange light.

  By switching the color of the light emitting portion 303 of the mount conversion adapter 30 to emit light as described above, lens data corresponding to the lens optical system 202 of the attached interchangeable lens 20 is stored in the adapter ROM 302 for the user. And that the mount conversion adapter 30 is compatible with storing lens data, and visually prompting the user to store lens data in the adapter ROM 302.

  Next, in step 5, the adapter CPU 301 ends the light emission control of the light emitting unit 303 after a predetermined time has elapsed, cancels the communication standby instruction for the camera CPU 101 performed in step 1, and performs communication with the camera CPU 101. To start. Thus, the light emission control of the light emitting unit 303 by the adapter CPU 301 is completed.

  Next, the configuration of the mount conversion adapter 30 of the present embodiment will be described with reference to FIGS.

  FIG. 3 is a diagram showing the appearance of the mount conversion adapter 30. Reference numeral 306 denotes an external member, 306a denotes a through hole formed in the external member 306, 304 denotes an adapter camera-side mount, and 305 denotes an adapter lens-side mount.

  The through hole 306a is an opening formed in the external member 306 so that light for notifying a user passes from the light emitting unit 303 disposed in the internal mechanism of the mount conversion adapter 30 to the outside.

  The adapter camera side mount section 304 and the adapter lens side mount section 305 are mechanisms for mechanically and electrically connecting to the mount section 100 of the camera body 10 and the mount section 100 of the interchangeable lens 20, respectively, by a mount mechanism.

  Note that, in FIG. 3, an alternate long and short dash line indicates an optical axis of the mount conversion adapter 30. The optical axis of the mount conversion adapter 30 matches the optical axis of the camera body 10 and also matches the optical axis of the interchangeable lens 20. The optical axis of the camera body 10 is an axis that passes perpendicularly through the center of the image sensor constituting the imaging unit 102 of the camera body 10, and the optical axis of the interchangeable lens 20 is an optical axis of the lens optical system 202 of the interchangeable lens 20. Axis.

  FIG. 5 is a cross-sectional view taken along a plane parallel to the optical axis including a cross-sectional line AA ′ passing through the optical axis of the mount conversion adapter 30 and the through hole 306a in the plan view of the mount conversion adapter 30 in FIG. . In the cross-sectional view of FIG. 5, the periphery of the light emitting unit 303 is further enlarged.

  In the cross-sectional view of FIG. 5, reference numeral 303 denotes a light emitting unit made of an LED; 306, an external member; 306 a, a through hole formed in the external member 306; 307, a diffusion axis arranged to make the through hole 306 a watertight; Denotes a printed circuit board, 309 denotes a reflection member, and 310 denotes a light shielding member.

  The through-hole 306a is formed in the external member 306, and is an optical opening of the external member 306 through which light from the light emitting section 303 disposed in the internal mechanism of the mount conversion adapter 30 passes. While the through-hole 306a has such a role, there is also a problem that an adverse effect of passing external environmental light through the internal mechanism of the mount conversion adapter 30 is caused. In a camera accessory such as a mount conversion adapter that guides subject light to the image sensor of the camera body, harmful light that is not the subject light invades from the outside, causing ghost or flare in a captured image. This may make it impossible to take a beautiful picture.

  Further, the diffusion shaft 307 is arranged so as to close the through hole 306a in a watertight manner. The diffusion shaft 307 has a role of visually and efficiently diffusing the light from the light emitting unit 303 to the outside and a role of maintaining the dust-proof and drip-proof performance of the mount conversion adapter 30. In the through hole 306a, similarly to the problem that external environmental light enters the internal mechanism, there is a possibility that dust and water droplets enter the internal mechanism from the outside. Therefore, in the present embodiment, a configuration is used in which the through hole 306a is closed in a watertight manner by using the diffusion shaft 307. The diffusion shaft 307 may be formed integrally with the appearance member 306 and the reflection member 309.

  The light emitting unit 303 is mounted on the printed board 308, and is electrically connected to the adapter CPU via a pattern wiring or the like of the printed board 308. The light emission of the light emitting unit 303 is controlled by the adapter CPU through the pattern wiring or the like of the printed board 308.

  The reflection member 309 is disposed so as to be in close contact with the inner side surface of the appearance member 306, and is disposed so as to be in close contact with the printed board 308.

  FIG. 6 is a perspective view of a single reflection member 309 viewed from the side and bottom. In FIG. 6, 309a indicates an incident surface, 309b indicates an emission surface, and 309c indicates a reflection surface.

  The reflecting member 309 is made of a light-transmitting synthetic resin material, for example, a polycarbonate resin or acrylic. The material of the reflecting member 309 is not limited to these as long as it is a light-transmitting synthetic resin that satisfies the function of a light guide that can guide the light from the light emitting section 303 to the through-hole 306a of the exterior member 306.

  Each part of the reflection member 309 shown in FIG. 6 will be described. The incident surface 309a is formed so as to cover the light emitting unit 303 mounted on the printed circuit board 308, so that light does not leak from the upper part and the side part with respect to the plane on which the light emitting part 303 of the printed circuit board 308 is mounted. Is formed. Similarly, the emission surface 309b is formed on the inner side surface of the exterior member 306 so as to cover the through hole 306a, and is formed in accordance with the shape of the diffusion shaft 307 in this embodiment.

  The reflecting surface 309c is formed at a predetermined angle with respect to the incident surface 309a and the emitting surface 309b so as to efficiently guide the light from the light emitting unit 303 entering the reflecting member 309 from the incident surface 309a to the emitting surface 309b. .

  Light emitted from the light emitting unit 303 is reflected inside the reflecting member 309 as shown in the example of the optical path shown in FIG. 5, and is emitted from the through hole 306a of the external member 306 to the outside of the mount conversion adapter. In this embodiment, most of the light emitted from the light emitting unit 303 is emitted toward the upper part of the light emitting unit, enters the reflecting member 309 from the incident surface 309a, and is reflected or reflected by the reflecting surface 309c inside the reflecting member 309. The light is totally reflected and emitted from the emission surface 309b to the outside of the mount conversion adapter. In order to more efficiently guide the light emitted from the light emitting unit 303 to the through hole 306a of the external member 306, a light emitting member having a higher directivity such as a bullet-shaped LED is used for the light emitting unit 303. Can be considered.

  The light emitted from the light emitting unit 303 includes light other than light that enters from the incident surface 309a of the reflecting member 309 and is emitted from the emission surface 309b to the outside of the mount conversion adapter, but is reflected as shown in FIG. A light-blocking member 310 for preventing light leakage is provided at a portion other than a portion of the incident surface 309a of the member 309 covering the light emitting portion 303 and a through hole 306a formed in the external member 306 of the emission surface 309c. Unnecessary light does not enter the mount conversion adapter.

  Further, since the light shielding member 310 for preventing light leakage is arranged on the reflection member 309, even if external light enters the inside of the mount conversion adapter from the through hole 306a of the external member 306, the external light enters from the reflection member 309 to the inside. Will not invade.

  As the light-shielding member 310 for preventing light leakage provided on a surface other than the incident surface 309a and the emission surface 309b of the reflection member 309, vapor deposition using aluminum or chromium, pasting of a metal foil such as aluminum foil or sheet metal, light-shielding film or resin It is conceivable to paste such as, or paint or cover. In particular, on the reflection surface 309c, in order to efficiently reflect the light from the light emitting unit 303, it is preferable that the light shielding member 310 be provided after being mirror-finished toward the inside of the reflection member 309.

  In this embodiment, the through hole 306a of the external member 306 is formed so as to completely penetrate the external member if it is an optical opening through which light from the light emitting section 303 passes. Alternatively, for example, the appearance member may be formed of a plastic member formed by two-color molding, and only the opening through which light passes may be formed of a transparent material.

  As described above, according to the present invention, the notification light from the light emitting unit is transmitted to the outside even if the position of the printed circuit board on which the light emitting unit is mounted and the optical opening of the external member are far apart in the camera accessory. It is possible to lead to. Also, even if external light enters the camera accessory from outside through the optical opening of the external member, it is possible to prevent external light from entering before the reflection member, so that ghosts and flare appear on the captured image. It is possible to prevent adverse effects such as the above. In addition, since it is possible to guide the notification light from the light emitting unit to the outside while the light emitting unit is directly mounted on the printed circuit board, a flexible printed circuit board for disposing the light emitting unit away from the printed circuit board on which the adapter CPU is mounted. This eliminates the need for additional components, so that the cost of increasing the number of parts can be suppressed, and the adverse effect of static noise received from wiring such as a flexible substrate can be eliminated.

  According to the present invention, it is possible to provide a camera accessory equipped with a light emitting device such as an LED mounted on the camera accessory and a notification function for notifying a user of a corresponding function of a detailed function. It prevents external light from entering the internal mechanism of the camera accessory through an optical opening formed in an external member of the camera accessory to pass light from the light emitting device to the outside, and adversely affects a captured image. This can be a camera accessory that prevents this.

10 Camera body 101 Camera CPU
102 imaging unit 103 image processing unit 104 power supply unit 105 camera mount unit 20 interchangeable lens 201 lens CPU
202 Lens optical system 203 Lens ROM
204 Lens mount unit 30 Mount conversion adapter 301 Adapter CPU
302 Adapter ROM
303 Light emitting section 304 Adapter camera side mount section 305 Adapter lens side mount section 306 Exterior member 306a Through hole 307 Diffusion axis 308 Printed circuit board 309 Reflecting member 310 Light shielding member

Claims (2)

A camera accessory that can be mechanically and electrically attached to the camera body by a mounting mechanism,
A light emitting unit that emits a notification light to notify a user of a function corresponding state, a light emission control unit that controls light emission of the light emitting unit, and the light emitting unit is mounted and electrically connects the light emitting unit and the light emission control unit. A printed circuit board to be connected and a prism made of a light-transmitting synthetic resin are provided,
The prism covers the light emitting unit and is in close contact with the printed circuit board. The prism covers an optical opening formed in an external member. The exit surface is in close contact with the external member. Light emitted from the light emitting unit. A reflection surface that changes the direction of light emitted in a direction parallel to the optical axis is formed,
A light-blocking member for preventing light leakage is provided on a surface of the incident surface other than a portion covering the light emitting unit and a surface of the emission surface other than a portion covering an optical opening formed in the external appearance member. Camera accessories. 2. The camera accessory according to claim 1, wherein a diffusion axis for transmitting the notification light from the light emitting unit to the outside is configured to close an optical opening of the external member in a watertight manner. 3.

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