JP4441358B2 - Electronic camera - Google Patents

Description

The present invention relates to an electronic camera.

  In recent years, many digital cameras using an image sensor such as a CCD have been put on the market. Such a digital camera has a problem that if a foreign object such as dust unrelated to the subject adheres to a cover glass or the like disposed in front of an image sensor such as a CCD, the foreign object also appears in the captured image. is there.

  In addition, even with a camera using a conventional silver salt film, if a foreign object adheres to the film, it will be reflected, but in the case of a film, since the film moves every frame, the same foreign object is reflected in all the frames. It is very rare to enter. However, in the case of an image sensor such as a CCD, since it does not move after photographing, the foreign matter appears on many frames once the foreign matter adheres. In addition, foreign substances gradually accumulate on the cover glass.

  Therefore, the photographer always has to be very careful about adhesion of foreign matter to the cover glass of the image pickup device such as CCD, and much labor has been spent on checking and cleaning the foreign matter. In particular, in a digital camera in which a photographic lens can be replaced, since dust enters from the outside when the photographic lens is replaced, the influence is great. Furthermore, since the image sensor is disposed at a relatively deep location inside the digital camera, cleaning work is not easy.

For this reason, a method has been proposed in which dust attached to a dustproof member provided on the front side of the image sensor is removed by applying vibration to the dustproof member, and the removed dust is collected so as not to adhere again. As a method for collecting the removed dust, (1) a method for adhering to the adhesive member, and (2) a method for ionizing the dust with a needle electrode and electrically collecting the ionized dust are proposed. Yes. (For example, refer to Patent Document 1).
JP 2003-338967 A

  However, the method described in Japanese Patent Application Laid-Open No. 2003-338967 removes dust adhering to the dust-proof member and collects the removed dust, so that the mechanism is complicated and the cost is high. is there.

  The present invention has been made to solve the above-described problem, and an object thereof is to prevent foreign objects such as dust from being captured in a captured image with a simple structure.

The electronic camera according to claim 1, wherein the electronic camera includes a photographic lens and an image sensor that converts an object image formed by the photographic lens into an electrical signal. The electronic camera is provided between the photographic lens and the image sensor. provided, has a position for guiding the optical path system of the reflected said subject light to subject light to the optical finder from the photographing lens, a position retracted from the photographing optical path, the quick return mirror moves between the semipermanently The electret member which hold | maintained the electric charge was attached to the peripheral part of the said quick return mirror, It is characterized by the above-mentioned.

According to another aspect of the present invention, an electronic camera includes an image sensor that converts an object image formed by a photographing lens into an electric signal. Then, the peripheral edge of the quick return mirror that moves between the position that reflects the subject light from the photographing lens and guides the subject light to the optical path system to the optical viewfinder and the position that retracts outside the photographing optical path is semipermanently charged. The electret member which hold | maintained is attached. Accordingly, foreign matter such as dust inside the electronic camera is electrostatically adsorbed to the electret member attached to the peripheral portion of the quick return mirror .

  Therefore, for example, it is possible to prevent foreign matter from adhering to a cover glass or the like disposed on the front surface of the image sensor and appearing in the captured image. That is, it is possible to prevent foreign matters such as dust from appearing in the captured image with a simple and inexpensive configuration.

According to a second aspect of the present invention, in the electronic camera according to the first aspect, the electret member is added to the peripheral portion of the quick return mirror, and photographing around the optical axis between the photographing lens and the imaging element is performed. It is also characterized by being placed outside the optical path .

In the electronic camera according to the second aspect, foreign matter such as dust is electrostatically adsorbed to an electret member disposed outside the photographing optical path around the optical axis between the photographing lens and the image sensor.

According to a third aspect of the present invention, there is provided the electronic camera according to the second aspect, wherein the electret member is disposed in a peripheral portion of the imaging device or in the vicinity of the peripheral portion.

In the electronic camera according to claim 3, foreign matter such as dust inside the electronic camera is electrostatically adsorbed to the peripheral portion of the image sensor or the electret member disposed in the vicinity of the peripheral portion.

According to a fourth aspect of the present invention, there is provided the electronic camera according to the second or third aspect , wherein the electret member is disposed on an inner wall of a lens barrel provided with the photographing lens.

In the electronic camera according to the fourth aspect, foreign matter such as dust inside the electronic camera is electrostatically adsorbed to an electret member disposed on the inner wall of the lens barrel provided with the photographing lens.

According to a fifth aspect of the present invention, in the electronic camera according to any one of the first to fourth aspects, the electret member is replaceable.
In the electronic camera according to claim 5, the electret member is replaceable. Therefore, for example, even if a large amount of foreign matter such as dust adheres to the electret member and the electrostatic adsorption force is weakened, the electrostatic adsorption force can be restored by replacing it with a new one.
The electronic camera according to claim 6, in the configuration of any one of claims 1 to 5, a photographic lens unit including the photographic lens, a camera body that mounts the photographic lens unit interchangeably, It is characterized by comprising.

  In the electronic camera according to the sixth aspect, a photographic lens unit including a photographic lens is mounted on the camera body in a replaceable manner. When replacing the taking lens unit, foreign matter such as dust enters. Foreign matter such as dust that has entered the inside of the electronic camera is electrostatically attracted to an electret member disposed outside the photographing optical path around the optical axis. Therefore, even with an electronic camera in which the photographing lens unit can be replaced, foreign matters such as dust are prevented from appearing in the photographed image.

  As described above, according to the present invention, it is possible to prevent foreign objects such as dust from appearing in a captured image with a simple structure.

  A digital camera according to an embodiment of the present invention will be described.

  As shown in FIG. 1, the digital camera 10 is a single-lens reflex digital camera that mainly captures still images. As shown in FIGS. 1 and 2, the digital camera 10 is provided with a photographic lens unit mount 14 on the front (front) portion of the camera body 12, and the photographic lens unit 16 is connected via the photographic lens unit mount 14. It is installed interchangeably.

  The photographing lens unit 16 includes a plurality of photographing lenses 300 such as an aperture mechanism 80 and a focusing lens 82 (see the block diagram of FIG. 8) in a cylindrical lens barrel 15. Note that the photographic lens 300 closest to the camera body 12 is the photographic lens 301. Further, the shutter button 18 is disposed at the upper left portion toward the front.

  As shown in FIG. 3, an optical viewfinder 60, a display panel 62, a liquid crystal monitor 64, a cross button 66, a menu / execution button 67, a back button 68, a function button 63 and the like are provided on the rear exterior portion of the digital camera 10. ing.

  The liquid crystal monitor 64 can display a subject image and a reproduced image of a recorded image. In addition, information on the currently set mode, image compression rate information, date / time information, frame number, and the like are also displayed. Furthermore, it is also used as a user interface display screen when the user performs various setting operations, and menu information such as setting items is displayed as necessary.

  The optical viewfinder 60 can directly view the subject image from the photographing lens unit 16 (see FIG. 1).

  As shown in FIG. 4, a quick return mirror 203 is provided in the photographing optical path inside the camera body 12. The quick return mirror 203 moves between a position for guiding the subject light from the photographing lens unit 16 to the optical path system to the optical viewfinder 60 (an oblique position) and a position for retracting it outside the photographing optical path (a retracted position). (So-called mirror down and mirror up). In FIG. 4, the quick return mirror 203 is in an oblique position where the mirror is lowered. The alternate long and short dash line indicates the optical axis 201.

  Above the quick return mirror 203, a focus plate 204 on which subject light guided to the optical viewfinder 60 forms an image is disposed. A condenser lens 205 for improving the visibility of the optical viewfinder 60 is provided above the focus plate 204. Then, the pentagonal roof prism 206 guides the subject light passing through the focusing plate 204 and the condenser lens 205 to the eyepiece 208 for the optical viewfinder 60.

  On the other hand, behind the quick return mirror 203, there is disposed a fall-plane shutter type shutter mechanism 30 in which the shutter 32 opens and closes in the vertical direction (the arrow Y direction in FIG. 5B). In FIG. 3, the shutter 32 is open. An image sensor unit 25 is disposed behind the shutter mechanism 30. The image sensor unit 25 includes a CCD 22 that is an image sensor, a cover glass 24 that protects the front surface of the CCD 22, and the like. The CCD 22 has a large number of photodiodes (not shown) arranged in a plane and has a honeycomb arrangement, a Bayer arrangement, and other predetermined color filter arrangement structures. Note that the cover glass 24 includes various optical filters arranged on the front surface of the image sensor, for example, a low-pass filter for reducing moire.

  Then, the quick return mirror 203 mirrors up to a position (retracted position) where the quick return mirror 203 is retracted out of the photographing optical path, opens the shutter 32, and accumulates charges in the CCD 22. Then, the image data is recorded on the recording medium 120 (see FIG. 8).

  Now, the digital camera 10 semipermanently charges outside the photographing optical path around the optical axis 201 between the plurality of photographing lenses 300 provided in the photographing lens unit 16 to the CCD 22 (a position not reflected in the photographed image). Electret sheets 302, 304, and 306 made of held electret fibers are disposed.

  Specifically, it arrange | positions at three places demonstrated below.

(1) Inner wall 15A of the lens barrel 15 of the photographing lens unit 16
As shown in FIGS. 4 and 5, in the vicinity of the joint of the photographing lens unit 16 with the photographing lens unit mount 14 (the photographing lens 301 closest to the camera body 12 of the photographing lens 300 and the photographing lens unit mounting portion 14 The electret sheet 302 is affixed to the inner wall 15 </ b> A of the lens barrel 15 .

(2) Peripheral Edge of Quick Return Mirror 203 As shown in FIGS. 4 and 6, an electret sheet 304 is attached to the peripheral edge of the quick return mirror 203 .

(3) Peripheral portion of the peripheral portion of the cover glass 24 that protects the CCD 22 As shown in FIGS. 4 and 7, an electret sheet 306 is attached to the peripheral portion of the cover glass 24 that protects the CCD 22 .

  The electret sheets 302, 304, and 306 are attached so as to be replaceable. For example, it may be attached with a double-sided tape (not shown) or attached to a fixing member (not shown), and this fixing member may be fixed to each location, for example, with a screw.

  An electret is a material in which electric charges are semipermanently held in an insulating substance body. As a manufacturing method, for example, a polymer material having excellent insulating properties (for example, Teflon (registered trademark), polypropylene, Mylar, etc.) is heated and melted and solidified between the electrodes while applying a high DC voltage. After removing the electrode, the surface in contact with the electrode is positively or negatively charged, and this polarization (a state divided into positive and negative electricity) is maintained semipermanently, so that there is a method of making an electret . Alternatively, there are a method in which a high DC voltage is applied to a needle electrode to generate ions in the atmosphere, and this is applied to the sample, or a method in which the sample is applied to the sample by pulse discharge.

  The electret sheets 302, 304, and 306 are made from the fibers thus electretized. In addition, the electret sheets 302, 304, and 306 are non-woven fabrics that are free from yarn waste or dust.

  FIG. 8 is a block diagram showing the internal configuration of the digital camera 10 (camera body 12 and taking lens unit 16). The photographing lens unit 16 includes a diaphragm mechanism 80 and a plurality of photographing lenses 300 such as a focusing lens 82, and an iris motor 83 and a drive circuit (motor driver) 84 as a means for driving the diaphragm mechanism 80, a focusing lens 82. An AF motor 86 and its drive circuit (motor driver) 87, a central processing unit for control (hereinafter referred to as a lens CPU) 88, and a ROM 89 storing various data are incorporated. .

  The ROM 89, which is a nonvolatile storage means, may be rewritable or may be rewritable like an EEPROM. The ROM 89 stores the model name, focal length, F-number, and other various information relating to the photographing lens performance (hereinafter referred to as “photographing lens information”) of the photographing lens unit 16.

  When the photographic lens unit 16 is mounted on the photographic lens unit mount 14 of the camera body 12 (see FIGS. 1 and 2), an electrical contact 14A provided on the photographic lens unit mount 14 and an electrical contact between the photographic lens unit 16 are provided. The photographing lens unit 16 and the camera body 12 are electrically connected via the unit 16A, and signals can be transferred between a CPU (hereinafter referred to as a camera CPU) 90 in the digital camera 10 and the lens CPU 88.

  The camera CPU 90 functions as a control unit that performs overall control of the camera system according to a predetermined program, and also functions as a calculation unit that performs various calculations such as an AE / AF calculation. A ROM 91 connected to the camera CPU 90 stores programs executed by the camera CPU 90 and various data necessary for control. The RAM 92 is used as a work area for the camera CPU 90. The ROM 91 which is a nonvolatile storage means may be non-rewritable, or may be rewritable like an EEPROM.

  The camera CPU 90 controls the operation of each circuit in the digital camera 10 based on instruction signals from the power switch 93, the mode selection switch 94, the release detection switch 95, and other operation units 96 provided in the camera body 12. . The operation unit 96 is a block including various operation means such as the cross button 66, the menu / execution button 67, the back button 68, and the function button 63 described with reference to FIG.

  The power switch 93 is an operation means for turning on / off the main power of the digital camera 10. The camera CPU 90 monitors the state of the power switch 93 and controls the power circuit 97 according to the state. That is, when the closed (ON) state of the power switch 93 is detected, the camera CPU 90 gives a start command signal to the power circuit 97 to start the power circuit 97.

  The power supply circuit 97 includes a DC / DC converter. The power supplied from the battery 98 loaded in the digital camera 10 is converted into a required voltage by the DC / DC converter of the power supply circuit 97 and then supplied from the power supply circuit 97 to each circuit block in the digital camera 10. The When the open (OFF) state of the power switch 93 is detected, the camera CPU 90 gives a stop command signal to the power circuit 97 to stop the power supply from the power circuit 97. Note that the main power ON / OFF is not limited to the operation of the power switch 93, but the auto power ON function (function to turn on power at a set time) and the auto power OFF function (no operation state for a certain period of time). There is also a mode of switching according to a case or a function of automatically turning off power at a set time.

  Further, the camera CPU 90 can detect attachment / detachment of the photographing lens unit 16 based on an electrical signal transmitted through the electrical contact portion 14 </ b> A, and acquire photographing lens information from the attached photographing lens unit 16. Can do. The acquired photographic lens information is stored in an EEPROM (nonvolatile storage means) 99 of the digital camera 10, and the information content is retained even when the power is turned off. The camera CPU 90 determines whether or not the photographic lens has been exchanged by comparing the data held in the EEPROM 99 with the photographic lens information newly acquired from the photographic lens unit 16 when the power is turned on.

  The mode selection switch 94 is a means for setting the operation mode of the digital camera 10, and by operating this mode changeover switch, a "shooting mode" (shooting mode) or a "playback mode" (a mode for playing back recorded images). ) And other modes. The release detection switch 95 is a detection switch disposed inside the shutter button 18 (see FIG. 1), and includes an S1 switch that is turned on when the shutter button 18 is half-pressed and an S2 switch that is turned on when the shutter button 18 is fully pressed. .

  When the “shooting mode” is selected by the mode selection switch 94, the digital camera 10 is ready for shooting. When the camera CPU 90 detects that the shutter button 18 is half-pressed (S1 = ON), it performs AE and AF processing, and when it detects that the shutter button 18 is fully pressed (S2 = ON), it captures an image for recording. The CCD exposure and readout control is started.

  The AE function mounted on the digital camera 10 is a TTL type AE. Inside the digital camera 10, an AE sensor (light receiving element) 100 as a detection system and the transmitted light from the photographing lens are branched to reach the AE sensor 100. An optical system (not shown) that forms a detection optical path is provided. The AF function of the digital camera 10 is a TTL phase difference type AF, and the digital camera 10 includes an AF module 101 which is a phase difference type AF detection system and an optical system (not shown) necessary for forming a detection optical path. Are arranged. The arrangement structure of the AE sensor 100 and the AF module 101, the configuration of the optical system, and the like are not particularly limited in the implementation of the present invention, and various modes known in the field of single-lens reflex cameras can be applied. The means for realizing the AE / AF function is not limited to the above example, and other AE / AF methods may be used.

  When the shutter button 18 is “half-pressed” (S 1 = ON), the camera CPU 90 determines the focus state based on the detection signal from the AF module 101 and generates a movement control signal for the focusing lens 82. This movement control signal is sent to the lens CPU 88. The lens CPU 88 controls the motor driver 87 based on the signal from the camera CPU 90 to operate the AF motor 86 and move the focusing lens 82 to the in-focus position.

  Further, the camera CPU 90 performs AE calculation based on the detection signal from the AE sensor 100 to calculate an aperture value and a shutter speed. A diaphragm control signal generated by the camera CPU 90 is sent to the lens CPU 88. The lens CPU 88 controls the motor driver 84 based on the signal from the camera CPU 90 to operate the iris motor 83, thereby opening the aperture mechanism 80 to a required opening.

  When the shutter button 18 is “fully pressed” (S2 = ON), the camera CPU 90 controls the shutter mechanism 30 (see FIG. 3) based on the result of the AE calculation, and opens and closes the shutter 32 of the shutter mechanism 30. At the same time, the charge accumulation time of the CCD 22 is controlled.

  The optical image of the subject imaged on the CCD 22 via the photographing lens unit 16 is photoelectrically converted by the CCD 22.

  The signal charges accumulated in each photodiode (not shown) of the CCD 22 are sequentially read out as voltage signals (imaging signals) corresponding to the signal charges based on the pulses supplied from the timing generator (TG) 103. The signal output from the CCD 22 is sent to the analog processing unit 104, where required processing such as correlated double sampling (CDS) processing, color separation, and gain adjustment is performed. The image signal generated by the analog processing unit 104 is converted into a digital signal by the A / D converter 106 and then stored in the memory 110 via the image input controller 108. The timing generator 103 provides timing signals to the CCD 22, analog processing unit 104, and A / D converter 106 in accordance with instructions from the camera CPU 90, and the circuits are synchronized by this timing signal.

  Data stored in the memory 110 is sent to the image signal processing circuit 114 via the bus 112. The image signal processing circuit 114 is an image processing unit including a luminance / color difference signal generation circuit, a gamma correction circuit, a sharpness correction circuit, a white balance correction circuit, and the like, and processes an image signal in accordance with a command from the camera CPU 90.

  The image data input to the image signal processing circuit 114 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. The image data generated by the image signal processing circuit 114 is sent to the compression / decompression circuit 116 and compressed according to a predetermined format such as JPEG. The compressed image data is recorded on the recording medium 120 via the media controller 118.

  The compression format is not limited to JPEG, and MPEG and other methods may be adopted. The means for storing image data is not limited to a semiconductor memory represented by a memory card, and various media such as a magnetic disk, an optical disk, and a magneto-optical disk can be used. Further, the recording medium (such as an internal memory) built in the digital camera 10 is not limited to a removable medium.

When “reproduction mode” is selected by the mode selection switch 94, an image file is read from the recording medium 120. The read image data is decompressed by the compression / decompression circuit 116 and sent to the VRAM 122. The data stored in the VRAM 122 is
After being converted into a predetermined display signal (for example, an NTSC color composite video signal) by the video encoder 124, it is supplied to the liquid crystal monitor 64. In this way, the image stored in the recording medium 120 is displayed on the liquid crystal monitor 64.

  Next, the operation of this embodiment will be described.

  In the digital camera 10, the photographing lens unit 16 is replaced as required by the user. At that time, foreign matter such as external dust enters the inside of the camera body 12 from the opening 17 (see FIG. 2) of the camera body 12. Alternatively, foreign matter such as dust mixed during production and foreign matter such as friction powder generated from a drive portion (for example, the shutter mechanism 30) inside the camera body 12 are also present inside the camera body 12. For example, when such a foreign substance adheres to the cover glass 24 (see FIG. 4), it appears in the photographed image.

  However, as shown in FIG. 4, the digital camera 10 includes electret sheets 302, 304, and 306 made of electret fibers that retain a charge semipermanently (1) the inner wall 15 </ b> A of the lens barrel 15 of the photographing lens unit 16, ( 2) It is affixed to three locations, the peripheral portion of the quick return mirror 203 and (3) the peripheral portion of the cover glass 24 that protects the CCD 22.

  Therefore, foreign matter such as dust is electrostatically adsorbed on the electret sheets 302, 304, and 306. Therefore, for example, foreign matters are prevented from adhering to the cover glass 24 and appearing in the photographed image. That is, it is possible to prevent foreign matters such as dust from appearing in the photographed image with a simple and inexpensive configuration by simply attaching the electret sheets 302, 304, and 306.

  Further, the electret sheets 302, 304, and 306 are replaceable (can be replaced). Therefore, for example, even if a large amount of foreign matter adheres to the electret sheets 302, 304, and 306 and the electrostatic attraction force is weakened, the electrostatic attraction force can be restored by replacing it with a new one.

  In addition, this invention is not limited to said embodiment.

  For example, in this embodiment, the electret sheets 302, 304, and 306 are (1) the inner wall 15A of the lens barrel 15 of the photographing lens unit 16, (2) the peripheral edge of the quick return mirror 203, and (3) a cover glass that protects the CCD 22. Although it has arrange | positioned in three places of the peripheral part of 24, it is not necessary to arrange | position in all three places. You may arrange | position in any one place or two places among (1) to (3). Further, it may be a place other than (1) to (3). That is, it may be arranged somewhere outside the photographing optical path around the optical axis 201 between the photographing lens 300 and the CCD 22.

  Further, for example, in the above-described embodiment, the quick return mirror 203 moves between a position for guiding subject light to the optical path system to the optical viewfinder 60 (an oblique position) and a position for retracting outside the photographing optical path (a retracted position). is doing. However, instead of such a quick return mirror 203, a semi-transparent mirror may be fixed in which a part of the subject light is reflected on the optical path system to the optical viewfinder 60 and a part thereof is transmitted.

  For example, in the above-described embodiment, a single-lens reflex digital camera that mainly captures still images has been described as an example. However, the present invention is not limited to this. The present invention can be applied to various electronic cameras such as a digital video camera and a DVD camera that mainly shoot moving images. Further, the present invention is not limited to the single-lens reflex type, and can be similarly applied to other types of photographing lens unit interchangeable electronic cameras. Furthermore, the present invention can also be applied to a photographing lens fixed type electronic camera (for example, a compact type digital camera) in which the photographing lens unit cannot be replaced. In the photographing lens fixed type electronic camera, dust does not enter when the photographing lens unit is replaced. However, dust mixed during production, friction powder generated from the drive part, and the like may adhere to the cover glass and cannot be removed by the user himself. Therefore, it is effective to apply the present invention.

1 is a perspective view showing a digital camera according to an embodiment of the present invention. 1 is a perspective view of a digital camera according to an embodiment of the present invention with a photographing lens unit removed. It is a figure which shows the back surface of the digital camera which concerns on one Embodiment of this invention. It is a figure which shows typically the inside of the digital camera which concerns on one Embodiment of this invention. 1 shows a photographic lens unit of a digital camera according to an embodiment of the present invention, wherein (A) is a cross-sectional view viewed in a direction orthogonal to the optical axis, and (B) is a cross-sectional view viewed in the optical axis direction. is there. (A) is a perspective view of the quick return mirror of the digital camera which concerns on one Embodiment of this invention, (B) is sectional drawing of the BB cross section of (A). 1 shows an image sensor unit of a digital camera according to an embodiment of the present invention, in which (A) is a plan view seen in the optical axis direction, and (B) is a cross-sectional view taken along the line BB in (A). . It is a block diagram which shows the internal structure of the digital camera which concerns on one Embodiment of this invention.

Explanation of symbols

10 Digital camera (electronic camera)
12 camera body 15 lens barrel 15A inner wall 16 photographing lens unit 22 CCD (imaging device)
25 Image sensor unit 60 Optical viewfinder 201 Optical axis
203 Quick return mirror 204 Focus plate (optical path system)
205 Condenser lens (optical path system)
206 Pentagonal Dach Prism (optical path system)
208 Eyepiece (optical path system)
300 photographing lens 301 photographing lens 302 electret sheet (electret member)
304 Electret sheet (Electret member)
306 Electret sheet (Electret member)

Claims (6)

A taking lens,
An image sensor for converting an object image formed by the photographing lens into an electric signal;
In an electronic camera comprising:
Provided between the photographing lens and the image sensor, between a position for reflecting subject light from the photographing lens and guiding the subject light to the optical path system to the optical viewfinder, and a position for retracting outside the photographing optical path Has a quick return mirror to move ,
An electronic camera , wherein an electret member holding a semi-permanent charge is attached to a peripheral portion of the quick return mirror . 2. The electronic camera according to claim 1, wherein the electret member is disposed outside a photographing optical path around an optical axis between the photographing lens and the imaging element in addition to a peripheral portion of the quick return mirror. . The electronic camera according to claim 2, wherein the electret member is disposed in a peripheral portion of the imaging element or in the vicinity of the peripheral portion . The electronic camera according to claim 2, wherein the electret member is disposed on an inner wall of a lens barrel including the photographing lens . The electronic camera according to claim 1, wherein the electret member is replaceable . A photographic lens unit comprising the photographic lens;
A camera body that mounts the photographic lens unit interchangeably;
The electronic camera according to claim 1, wherein the electronic camera is configured as follows.

Images