JP2006251225A - Photographing device and lens unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photographing device whose lens can be replaced even underwater or in a high humidity environment. <P>SOLUTION: Each of a body mount 16 and a lens mount 26 has three pawl parts. When a mark on the side of a camera body 12 is made to coincide with a mark on the side of the lens unit 14 and the lens unit 14 is turned, the lens unit 14 is locked on a correct position and a receiving part 27 is sealed with an O-ring 28. The end surfaces 32a of a plurality of optical fibers 32 provided on the bottom surface of the receiving part 27 come in almost close contact with the end surfaces 34a of the corresponding optical fibers 34 on the side of the lens unit 14, so that the optical communication between the camera body 12 and the lens unit 14 can be attained. When the lens unit 14 is attached/detached underwater, water enters between the optical fibers 32 and 34, however reduction in communication speed is made extremely little. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an interchangeable lens photographing apparatus and a lens unit that is detachably attached to the apparatus main body.

As an interchangeable lens type photographing apparatus, a single-lens reflex camera using a silver salt film has been generally used for a long time. Recently, single-lens reflex digital cameras have begun to spread. In addition, a camera (digital camera) has been proposed in which a lens unit incorporating a photographing lens and a CCD (solid-state imaging device) is detachably attached to a camera body (for example, Patent Document 1).
Japanese Patent Laid-Open No. 08-172561

  In the camera described in Patent Document 1, even if the lens unit and the camera body are sealed, if the lens is exchanged in water or in a humid environment (rainy weather, beach, etc.), the lens unit and the camera body are electrically connected. There is a problem that rust is generated at the contact point to be connected. Therefore, if the lens unit and the camera body are sealed together in the underwater housing, there is a disadvantage that the lens cannot be exchanged.

  An object of this invention is to provide the imaging device and lens unit which can replace | exchange a lens also in underwater or a humid environment.

  An imaging apparatus according to the present invention includes an imaging lens, a solid-state imaging device that converts and outputs subject light imaged by the imaging lens into an analog signal, and an A / D converter that converts the analog signal into a digital signal. In a photographing apparatus comprising a lens unit having a built-in lens and a lens body in which the lens unit is detachably mounted and the digital signal is stored in a storage means, the digital signal and the light are mounted with the lens unit mounted on the apparatus body. An optical communication means for performing optical communication by converting signals to each other is provided in each of the lens unit and the apparatus main body. The lens unit has a built-in power source for driving the optical communication means.

  A lens unit including a photographing lens, a solid-state imaging device that converts and outputs subject light imaged by the photographing lens into an analog signal, and an A / D converter that converts the analog signal into a digital signal And a lens-side light conversion unit that is provided in the lens unit and converts the digital signal into an optical signal. Means, a main body side light converting means for converting the optical signal into a digital signal, connected to each of the unit side light converting means and the main body side light converting means, and the lens unit is connected to the main body of the apparatus. And an optical fiber opposed to each other so as to be capable of optical communication. The lens unit has a built-in power source for driving the unit-side light converting means. Note that the term “relative” includes a state in which end faces of optical fibers are substantially in close contact with each other.

  A lens unit including a photographing lens, a solid-state imaging device that converts and outputs subject light imaged by the photographing lens into an analog signal, and an A / D converter that converts the analog signal into a digital signal And a lens unit that is detachably mounted and includes a device main body that stores the digital signal in a storage unit. The unit is provided in the lens unit and converts the digital signal into a radio signal and transmits the radio signal. Side wireless communication means and main body side wireless communication means provided in the apparatus main body for receiving the wireless signal and converting it into a digital signal. The lens unit has a built-in power source for driving the unit-side wireless communication means. Further, the lens unit and the apparatus main body each have a waterproof structure. The connecting portion between the lens unit and the apparatus main body has a waterproof structure.

  The lens unit of the present invention is used by being detachably mounted on the apparatus main body, and is a photographic lens, a solid-state imaging device that converts subject light imaged by the photographic lens into an analog signal, and the analog signal. In a lens unit that incorporates an A / D converter that converts a digital signal into a digital signal and performs shooting in response to a release signal from the apparatus main body, the release signal from the apparatus main body is attached to the apparatus main body. Non-contact communication means for receiving and transmitting the digital signal to the apparatus main body is provided, and this communication means, the photographing lens, the solid-state imaging device, and the A / D converter are incorporated in a waterproof lens barrel. It is characterized by that.

  In addition, the photographic lens, a solid-state image sensor that converts the subject light imaged by the photographic lens into an analog signal and outputs it, and the analog signal are converted into a digital signal. In a lens unit that incorporates an A / D converter that performs shooting in response to a release signal from the apparatus main body, receives a release signal as an optical signal from the apparatus main body while attached to the apparatus main body. In addition, optical conversion communication means for converting the digital signal into an optical signal and transmitting the optical signal to the apparatus main body is provided, and the optical conversion communication means and the photographing lens, the solid-state imaging device, and the A / D converter are waterproofed. It is characterized by being incorporated in a lens barrel.

  According to the photographing apparatus of the present invention, each of the lens unit and the apparatus main body is provided with optical communication means for performing optical communication by converting a digital signal and an optical signal to each other with the lens unit mounted on the apparatus main body. Unlike conventional imaging devices that use metal electrical contacts, lenses can be exchanged even in water or in humid environments. Further, since the lens unit has a built-in power source for driving the optical communication means, it is not necessary to supply power from the apparatus main body side, and it is not necessary to provide an electrical contact related to power supply, which may cause rust. There is no.

  In addition, since the light conversion means and the optical fiber are provided in both the lens unit and the apparatus main body, and the digital signal output from the lens unit is sent to the apparatus main body and stored in the storage means, conventional photographing using metal electrical contacts Unlike the device, the lens can be changed even in water or in a humid environment. In addition, since the lens unit has a built-in power source for driving the light conversion means, it is not necessary to supply power from the apparatus body side, and it is not necessary to provide an electrical contact for power supply. Absent.

  Further, since both the lens unit and the apparatus main body are provided with wireless communication means, and a digital signal output from the lens unit is sent to the apparatus main body and stored in the storage means, the lens can be exchanged even in water or in a humid environment. In addition, since the lens unit has a built-in power source for driving the wireless communication means, it is not necessary to supply power from the apparatus body side, and it is not necessary to provide an electrical contact related to power supply, so there is a risk of rusting. Absent.

  In addition, since the lens unit and the apparatus main body each have a waterproof structure, the lens can be exchanged even underwater or in a humid environment. In addition, since the connection portion between the lens unit and the apparatus main body has a waterproof structure, there is no risk of water entering the connection portion even in water or in a humid environment, and optical communication can be performed at high speed. In addition, when the lens is exchanged in water or in a humid environment, water can enter the connection part, so water can enter between the optical fiber on the lens unit side and the optical fiber on the device body side. If it is made very narrow, the decrease in the optical communication speed can be made extremely small.

  According to the lens unit of the present invention, there is provided non-contact communication means for receiving a release signal from the apparatus main body while being attached to the apparatus main body and transmitting a digital signal to the apparatus main body. Since the lens, the solid-state imaging device, and the A / D converter are incorporated in a lens barrel that has been waterproofed, the lens can be exchanged even in water or in a humid environment.

  The optical conversion communication means is provided for receiving a release signal as an optical signal from the apparatus main body while being attached to the apparatus main body and converting a digital signal into an optical signal and transmitting the optical signal to the apparatus main body. Since the photographing lens, the solid-state imaging device and the A / D converter are incorporated in a waterproof lens barrel, the lens can be exchanged even in water or in a humid environment.

  In FIG. 1 showing the appearance of a digital camera according to the first embodiment of the present invention, a digital camera 10 includes a camera body 12 and a lens unit 14 that is interchangeably attached thereto. In addition to the lens unit 14 described in the present embodiment, the lens unit mounted on the camera body 12 includes the type of photographing lens (single focus, telephoto zoom, standard zoom, etc.) and the screen size of a CCD that is a solid-state image sensor. Several types are available, including those with different

  On the front surface of the camera body 12, a body mount 16 for mounting the lens unit 14 and a strobe light emitting unit 18 are provided. An upper part of the camera body 12 is provided with a shutter button 20, a power switch 21, and an operation dial 22 for setting various modes. A zoom lever 25 (see FIG. 4) is provided on the rear surface of the camera body 12 to be operated when changing (changing the focal length) of the taking lens 24 of the lens unit 14. An opening / closing lid (not shown) that is opened and closed when the memory card 90 (see FIG. 4) is inserted and removed is provided on the side surface of the camera body 12.

  In addition to non-movable parts such as the strobe light-emitting part 18, movable parts such as the shutter button 20 are waterproofed such as O-rings and rubber seals so that water does not enter the camera body 12 when pressed down in water. The camera body 12 can be used even in water. The opening / closing lid of the memory card 90 is waterproofed with an O-ring or the like so as to be waterproof when closed. The lens unit 14 is also waterproofed such as an O-ring or rubber seal and can be used underwater.

  A concave receiving portion 27 for receiving the lens mount 26 of the lens unit 14 is provided at the center of the body mount 16. The mount composed of the body mount 16 and the lens mount 26 is a well-known bayonet mount to which a waterproof structure by an O-ring 28 is added. That is, the body mount 16 and the lens mount 26 each have three claw portions 16a to 16c, 26a (the other two are not shown), and the mark 29 on the camera body 12 side is attached to the lens unit 14 side. When the lens unit 14 is rotated with the mark 30 aligned, the lens unit 14 is locked at a correct position by a lock pin (not shown), and the receiving portion 27 is sealed by the O-ring 28.

  End surfaces 32a of three optical fibers 32 (see FIG. 2) are exposed in a circular arc shape on the bottom surface of the receiving portion 27. When the lens unit 14 is attached to the receiving portion 27, the end surface 32a is substantially in close contact with the end surface 34a of the corresponding optical fiber 34 on the lens unit 14 side so that the center axes thereof coincide with each other, as shown in FIG. Thus, optical communication with the lens unit 14 is possible. Although it is preferable in terms of communication accuracy that the end faces 32a and 34a are in close contact with each other without any gap, communication is possible even with a slight gap.

  Thus, since communication with the lens unit 14 is performed by the optical fibers 32 and 34, unlike metal contacts, there is no possibility that rust will be generated even if the lens is exchanged in water or in a humid environment.

  Optical conversion modules 35 and 36 are provided behind the optical fibers 32 and 34 integrally therewith. The optical conversion modules 35 and 36 mutually convert an electric signal (digital signal) and an optical signal. The camera body 12 and the lens unit 14 are provided with power control units 37 and 38 for supplying power to the light conversion modules 35 and 36 and other parts, respectively. Batteries 39 and 40 such as lithium ion batteries are connected to the power control units 37 and 38, respectively.

  As described above, since the battery is built in the lens unit, it is not necessary to supply power from the camera body side, and an electric contact for supplying power is not necessary. Therefore, the electrical contact can be eliminated from the portion (particularly the mount peripheral portion) that may get wet with water, and rust can be prevented.

  In FIG. 3 showing the electrical configuration of the lens unit 14, the photographing lens 24 is composed of a zoom lens 42 that changes the focal length, a focus lens 44 that focuses, and the like (other fixed lenses are not shown). And moved in the direction of the optical axis L by stepping motors 46 and 47, respectively. The stepping motors 46 and 47 are controlled by the unit controller 50 through motor drivers 48 and 49. The unit controller 50 controls the entire lens unit 14 via the bus 51.

  The light that has passed through the photographing lens 24 enters the CCD 52. The CCD 52 outputs a voltage signal (analog image signal) having luminance information of each RGB color based on the pulse given from the CCD driver 54. The CCD 52 has a so-called electronic shutter function that controls the charge accumulation time (shutter speed) of each MOS diode by the timing of the shutter gate pulse.

  The analog image signal output from the CCD 52 is sent to the analog processing unit 54. The analog processing unit 54 includes signal processing circuits such as a sampling hold circuit, a color separation circuit, and a gain adjustment circuit. In the analog processing unit 54, the correlated double sampling (CDS) processing and the R, G, B color signals are processed. Color separation processing is performed, and signal level adjustment (pre-white balance processing) of each color signal is performed.

  The signal output from the analog processing unit 54 is converted into a digital signal by the A / D converter 56, then divided into three by the unit control unit 50, and sent to the three-wire serial driver 60 via the bus 51. Here, each of the three parallel signals is converted into a serial signal and input to the optical conversion module 36, and each serial digital signal is converted into an optical signal.

  The optical signal is sent to the optical fiber 32 on the camera body 12 side through the three optical fibers 34. Thus, since the digital signal for one screen is divided into three serial signals and transmitted all at once, the digital signal is transmitted at a speed three times as fast as that when the single serial signal is transmitted.

  In FIG. 4 showing the electrical configuration of the camera body 12, the optical signal sent from the optical fiber 34 of the lens unit 14 is input to the light conversion module 35 via the three optical fibers 32, and the three optical signals are respectively transmitted. Converted to a digital signal. This digital signal is input to a three-line serial driver 72, converted from a serial signal to a parallel signal, and then synthesized into image data for one screen by the main body control unit 80, and is then transmitted to the frame memory 76 via the bus 74. Stored in The image data stored in the frame memory 76 is sent to the digital signal processing unit 78 via the bus 74.

  The digital signal processing unit 78 includes a digital signal processor (DSP) including a luminance / color difference signal generation circuit, a gamma correction circuit, a sharpness correction circuit, a contrast correction circuit, a white balance correction circuit, and the like. The digital signal as the image data is processed according to The main body control unit 80 controls the entire camera main body 12 via the bus 74 such as driving the strobe control unit 81 according to the subject brightness and causing the strobe light emitting unit 18 to emit light in addition to the above-described image data synthesis. .

  The image data input to the digital signal processing unit 78 is converted into a luminance signal (Y signal) and a color difference signal (Cr, Cb signal) and subjected to predetermined processing such as gamma correction, and then the frame memory 76. Stored in When a captured image is displayed and output, image data is read from the frame memory 76 and transferred to the display memory 82. The data stored in the display memory 82 is converted into a predetermined display signal (for example, an NTSC color composite video signal) by the LCD driver 84 and then output to a liquid crystal monitor (LCD) 86.

  The image data in the frame memory 76 and the display memory 82 is periodically rewritten by the image signal output from the CCD 52, and a video signal generated from the image data is supplied to the liquid crystal monitor 86, so that the photographed image can be obtained. It is displayed on the liquid crystal monitor 86 in real time. The photographer can check the shooting screen by an image (through image) displayed on the liquid crystal monitor 86.

  In addition, a media controller 88 and a JPEG compression / decompression unit 89 are connected to the bus 74. The media controller 88 writes image data into the memory card 90. The JPEG compression / decompression unit 89 compresses image data in the JPEG format before writing to the memory card 90, and also decompresses the compressed image data when reproducing the image data on the memory card 90.

  When the shutter button 20 is pressed, a release signal is input to the main body control unit 80. In the case of a release signal, since the data amount is small, the main body control unit 80 sends the release signal as it is to the optical conversion module 35 via the bus 74 and the serial driver 72 without dividing the release signal into three. The light conversion module 35 converts the release signal into an optical signal and sends it to the light conversion module 36 on the lens unit 14 side via a predetermined optical fiber 32, 34.

  By the way, when the lens is exchanged in water, water can enter the receiving portion 27 and water can enter between the optical fibers 32 and 34. However, since the optical fibers 32 and 34 are almost in close contact with each other, the communication speed by water is high. The decline is very small.

  The optical conversion module 36 converts the optical signal into a release signal and then sends it to the unit controller 50 via the serial driver 60 and the bus 51. The unit controller 50 drives the stepping motor 47 via the motor driver 49 to move the focus lens 44 to the in-focus position, and controls exposure by controlling the electronic shutter of the CCD 52. Further, the main body control unit 80 sends a command to the strobe control unit 81 as necessary, and emits strobe light from the strobe light emitting unit 18.

  In this way, in response to the pressing operation of the shutter button 20, the capturing of the recording image data is started. The image signal (analog signal) output from the CCD 52 is converted into a digital signal by an A / D converter 56 through an analog signal processing unit, and then divided into three, and the optical conversion module 36 via the bus 51 and the serial driver 60. And converted from a digital signal to an optical signal.

  The optical signals are simultaneously sent to the optical fiber 32 on the camera body 12 side by the three optical fibers 34, and are converted into digital signals by the optical conversion module 35, respectively. These digital signals are combined into image data (digital signals) for one screen by the main body control unit 80 and then sent to the frame memory 76. The image data is subjected to various processing by the digital signal processing unit 78, compressed in JPEG format by the JPEG compression / decompression unit 89, sent to the media controller 88, and written to the memory card 90.

  Even when the zoom lever 25 is operated, this operation signal is transmitted to the unit controller 50 of the lens unit 14 by optical communication, and the stepping motor 46 is driven via the motor driver 48 so that the variable power lens 42 is optically transmitted. It is moved in the direction of the axis L.

  Next, the operation of the above embodiment will be described. When the lens unit 14 is attached to the camera body 12 in a place other than underwater, water does not enter the receiving portion 27 by the O-ring 28 even if the digital camera 10 is put in water. The optical communication speed is high.

  In addition, when the lens unit 14 is attached and detached in water, water can enter the receiving portion 27 and water can enter between the optical fibers 32 and 34. However, the end faces 32a and 34a of the optical fibers 32 and 34 are almost in close contact with each other. Therefore, the decrease in communication speed is extremely small.

  In addition, since the end faces 32a and 34a of the optical fibers 32 and 34 do not rust even when wet, the rust does not hinder the exchange of signals between the lens unit 14 and the camera body 12, and the digital camera 10 is maintained. Management becomes easy.

  As described above, the digital camera 10 can take a picture while freely exchanging lenses not only in a general environment such as outdoors or indoors, but also in an underwater or humid environment. In underwater photography, it is preferable to use a wider-angle lens because the refractive index of water is different from that of air.

  In the embodiment described above, the communication between the camera body and the lens unit is performed by optical communication using an optical fiber. However, the present invention is not limited to this, and non-contact communication means such as wireless communication means is used. If used, it is possible to provide a digital camera that is free from rusting even when the lens is exchanged in water. Next, a second embodiment using this wireless communication means will be described.

  A digital camera according to the second embodiment of the present invention includes a camera body 102 shown in FIG. 5 and a lens unit 104 shown in FIG. In this embodiment, instead of the optical conversion module and the optical fiber of the first embodiment, wireless modules 106 and 107 and antennas 108 and 109 that perform wireless communication by mutually converting digital signals and wireless signals are used. In addition, the same code | symbol is attached | subjected to the same component as 1st Embodiment, and description is abbreviate | omitted.

  The antennas 108 and 109 are provided integrally with the wireless modules 106 and 107, respectively. These antennas 108 and 109 are provided inside the camera body 102 and the lens unit 104, respectively, and are not exposed to the surface. There is no risk of it occurring.

  Further, when the lens unit 104 is mounted on the camera body 102, it is advantageous in terms of communication speed that the distance between the antennas 108 and 109 is short, but communication is possible even if the antennas 108 and 109 are separated from each other. Therefore, the degree of freedom of the installation positions of the wireless modules 106 and 107 and the antennas 108 and 109 is high. Further, since the antennas 108 and 109 are not necessarily provided in the mount portion, the waterproof structure of the camera body 102 and the lens unit 104 and the waterproof structure of the connection portion between the camera body 102 and the lens unit 104 are further simplified. Can do.

  Alternatively, the underwater camera mode and the normal camera mode may be provided so that the mount unit for mounting the lens unit 104 on the camera main body 102 may be provided with a mount contact for the normal camera mode. In this case, when the underwater camera mode is selected, it is possible to save power if it is configured to perform only wireless communication without supplying a signal to the mount contact for the normal camera mode. For wireless communication, a wireless LAN standard (IEEE 802.11b or the like) can be used.

  In the first embodiment, the end faces of the optical fibers are arranged in an arc shape. However, the present invention is not limited to this, and the corresponding end faces are mutually centered with the lens unit attached to the camera body. As long as they are relative (including a substantially close state) without shifting, for example, they may be line-shaped or arranged with no particular regularity.

  In the first embodiment, the number of optical fibers is three, and the image data is divided into three parts and transmitted at the same time, so that the data is transmitted three times as fast as the case of one, but the present invention is not limited to this. Without limitation, for example, the number of optical fibers may be ten, and the image data may be divided into ten to increase the speed. If priority is given to lowering the cost over the communication speed, the number may be reduced to one. . In the first embodiment, the image data is divided. However, the photographing screen may be virtually divided into a plurality of areas in advance, and the image data for each area may be transmitted using a plurality of optical fibers.

  Moreover, in the said 1st Embodiment, although the optical fiber and the optical conversion module were combined and used as an optical communication means, this invention is not limited to this, For example, light receiving elements, such as LED, and light receiving elements, such as SPD Can also be used in combination. Moreover, although the said 1st, 2nd embodiment was a digital camera which image | photographs a still image, the movie camera which image | photographs a moving image may be sufficient.

1 is a perspective view illustrating an appearance of a digital camera that is a first embodiment of the present invention. It is explanatory drawing which shows the state which mounted | wore the camera main body with the lens unit. It is a block diagram which shows the electrical structure of a lens unit. It is a block diagram which shows the electrical structure of a camera main body. It is a block diagram which shows the electrical structure of the camera main body of 2nd Embodiment. It is a block diagram which shows the electric constitution of the lens unit of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Digital camera 12,102 Camera main body 14,104 Lens unit 16 Body mount 26 Lens mount 27 Receiving part 28 O-ring 32,34 Optical fiber 35,36 Light conversion module 37,38 Power supply control part 39,40 Battery 50 Unit control part 52 CCD
80 Main body control unit 106, 107 Wireless module 108, 109 Antenna

Claims (10)

A lens unit including a photographic lens, a solid-state imaging device that converts and outputs subject light imaged by the photographic lens into an analog signal, and an A / D converter that converts the analog signal into a digital signal; In the photographing apparatus comprising this lens unit detachably mounted and the apparatus main body for storing the digital signal in a storage means,
An imaging apparatus, wherein an optical communication means for performing optical communication by mutually converting a digital signal and an optical signal in a state where the lens unit is mounted on the apparatus main body is provided in each of the lens unit and the apparatus main body.   The photographing apparatus according to claim 1, wherein the lens unit includes a power source for driving the optical communication unit. A lens unit including a photographic lens, a solid-state imaging device that converts and outputs subject light imaged by the photographic lens into an analog signal, and an A / D converter that converts the analog signal into a digital signal; In the photographing apparatus comprising this lens unit detachably mounted and the apparatus main body for storing the digital signal in a storage means,
Unit-side light conversion means provided in the lens unit for converting the digital signal into an optical signal;
A body-side light converting means provided in the apparatus body for converting the optical signal into a digital signal;
An optical fiber connected to each of the unit side light converting means and the main body side light converting means, and opposed to each other so as to be capable of optical communication in a state where the lens unit is mounted on the apparatus main body,
An imaging apparatus comprising:   4. The photographing apparatus according to claim 3, wherein the lens unit has a built-in power source for driving the unit side light converting means. A lens unit including a photographic lens, a solid-state imaging device that converts and outputs subject light imaged by the photographic lens into an analog signal, and an A / D converter that converts the analog signal into a digital signal; In the photographing apparatus comprising this lens unit detachably mounted and the apparatus main body for storing the digital signal in a storage means,
Unit-side wireless communication means provided in the lens unit, for converting the digital signal into a wireless signal and transmitting the wireless signal;
A body-side wireless communication means provided in the apparatus body for receiving the wireless signal and converting it into a digital signal;
An imaging apparatus comprising:   6. The photographing apparatus according to claim 5, wherein the lens unit includes a power source for driving the unit-side wireless communication unit.   The photographing apparatus according to claim 1, wherein each of the lens unit and the apparatus main body has a waterproof structure.   The photographing apparatus according to claim 7, wherein a connection portion between the lens unit and the apparatus main body has a waterproof structure. A photographing lens, a solid-state imaging device that converts and outputs subject light imaged by the photographing lens into an analog signal, and A that converts the analog signal into a digital signal. In a lens unit that has a built-in / D converter and shoots in response to a release signal from the apparatus body,
Non-contact communication means for receiving a release signal from the apparatus main body while being attached to the apparatus main body and transmitting the digital signal to the apparatus main body is provided. The communication means, the photographing lens, the solid-state imaging device, and A A lens unit comprising a / D converter and a waterproof lens barrel. A photographing lens, a solid-state imaging device that converts and outputs subject light imaged by the photographing lens into an analog signal, and A that converts the analog signal into a digital signal. In a lens unit that has a built-in / D converter and shoots in response to a release signal from the apparatus body,
An optical conversion communication means for receiving a release signal as an optical signal from the apparatus main body while being attached to the apparatus main body and converting the digital signal into an optical signal and transmitting the optical signal to the apparatus main body is provided. And a lens unit in which the photographing lens, the solid-state imaging device, and the A / D converter are incorporated in a waterproof lens barrel.

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