Abstract: An imaging apparatus includes a second mount configured to bayonet-couple with a first mount. The second mount has multiple contact points disposed in a circumferential direction that are to be electrically connected to multiple contact faces on the first mount when coupled. The number of the contact points is an even number of four or larger. When viewing the imaging apparatus in a normal position from the second mount side, a line extending from a center axis of the second mount in the gravitational direction and an opposite direction is a first mount center line, and a line orthogonal thereto is a second mount center line. The contact pins include a first contact pin that overlaps the first mount center line, and second and third contact pins at both ends in the circumferential direction of the second mount, with generally the same distance to the second mount center line.

Abstract: An imaging apparatus includes a second mount configured to bayonet-couple with a first mount. The second mount has multiple contact points disposed in a circumferential direction that are to be electrically connected to multiple contact faces on the first mount when coupled. The number of the contact points is an even number of four or larger. When viewing the imaging apparatus in a normal position from the second mount side, a line extending from a center axis of the second mount in the gravitational direction and an opposite direction is a first mount center line, and a line orthogonal thereto is a second mount center line. The contact pins include a first contact pin that overlaps the first mount center line, and second and third contact pins at both ends in the circumferential direction of the second mount, with generally the same distance to the second mount center line.

Abstract: A cleaning device is used to remove an alien substance adhering to a surface of an optical member arranged in front of a solid image sensing device inside a lens replaceable digital single-lens reflex camera. The cleaning device includes a supporting member that is supported by a user, and an elastic member having an adhesive surface 12 and being formed in a substantially square shape larger than equally divided four parts of a 135 format of a camera and smaller than an APS-C format of the camera.

Abstract: An integrated circuit includes a high-frequency power amplifier and a matching circuit. The high-frequency power amplifier has at least one stage of an amplifier element. The matching circuit has a MOSFET and a detector diode. The source of the MOSFET is connected to an input of a first stage amplifier element, the drain is connected to a ground, and the gate is also connected to the ground. A capacitor is connected between the gate of the MOSFET and the ground. The detector diode is connected in parallel between the drain and the gate of the MOSFET. Turning on the MOSFET reduces the effective gain of the first stage amplifier element, thereby allowing mode change.

Abstract: A cleaning device is used to remove an alien substance adhering to a surface of an optical member arranged in front of a solid image sensing device inside a lens replaceable digital single-lens reflex camera. The cleaning device includes a supporting member that is supported by a user, and an elastic member, a surface 12 thereof has cohesiveness and is formed in a substantially square shape larger than equally divided four parts of a 135 format of a camera and smaller than an APS-C format of the camera.

Abstract: A viewfinder display apparatus which can realize superimpose having good visibility without giving uncomfortable feeling to a photographer is disclosed. The viewfinder display apparatus includes an eyepiece lens unit, an a member on which illumination unit which irradiates illumination light, and a plurality of region display sections arranged in a viewfinder optical path respectively to correspond to the focus detection regions. Each of the region display sections includes an outer frame which partially transmits light from an object to display edges of the focus detection regions in the viewfinder field and reflecting region in which reflecting surface which reflects illumination light from the illumination unit to guide the reflected light to the eyepiece lens unit are formed.

Abstract: A viewfinder display apparatus which can realize superimpose having good visibility without giving uncomfortable feeling to a photographer is disclosed. The viewfinder display apparatus includes an eyepiece lens unit, an a member on which illumination unit which irradiates illumination light, and a plurality of region display sections arranged in a viewfinder optical path respectively to correspond to the focus detection regions. Each of the region display sections includes an outer frame which partially transmits light from an object to display edges of the focus detection regions in the viewfinder field and reflecting region in which reflecting surface which reflects illumination light from the illumination unit to guide the reflected light to the eyepiece lens unit are formed.

Abstract: A viewfinder display apparatus which can realize superimpose having good visibility without giving uncomfortable feeling to a photographer is disclosed. The viewfinder display apparatus includes an eyepiece lens unit, an a member on which illumination unit which irradiates illumination light, and a plurality of region display sections arranged in a viewfinder optical path respectively to correspond to the focus detection regions. Each of the region display sections includes an outer frame which partially transmits light from an object to display edges of the focus detection regions in the viewfinder field and reflecting region in which reflecting surface which reflects illumination light from the illumination unit to guide the reflected light to the eyepiece lens unit are formed.

Abstract: An integrated circuit includes a high-frequency power amplifier and a matching circuit. The high-frequency power amplifier has at least one stage of an amplifier element. The matching circuit has a MOSFET and a detector diode. The source of the MOSFET is connected to an input of a first stage amplifier element, the drain is connected to a ground, and the gate is also connected to the ground. A capacitor is connected between the gate of the MOSFET and the ground. The detector diode is connected in parallel between the drain and the gate of the MOSFET. Turning on the MOSFET reduces the effective gain of the first stage amplifier element, thereby allowing mode change.

Abstract: A viewfinder display apparatus which can realize superimpose having good visibility without giving uncomfortable feeling to a photographer is disclosed. The viewfinder display apparatus includes an eyepiece lens unit, an a member on which illumination unit which irradiates illumination light, and a plurality of region display sections arranged in a viewfinder optical path respectively to correspond to the focus detection regions. Each of the region display sections includes an outer frame which partially transmits light from an object to display edges of the focus detection regions in the viewfinder field and reflecting region in which reflecting surface which reflects illumination light from the illumination unit to guide the reflected light to the eyepiece lens unit are formed.

Abstract: A camera includes a camera body having formed integrally therewith a film-travel guide part in a film exposing position and a fixed photo-taking lens barrel, and a photo-taking image frame forming member mounted in the film exposing position on the camera body.

Abstract: An apparatus, such as a camera, adapted for a film having a magnetic recording part, includes a magnetic head which at least reads information from the magnetic recording part of the film, a pad which brings the film close to the magnetic head, a pad support part which supports the pad, and a magnetic shield member disposed between the pad and the pad support part.

Abstract: A camera or a cartridge loading apparatus for a camera includes a determination mechanism for determining whether a cartridge is usable, a supporting member for movably supporting the determination mechanism to be move by the cartridge, and a prevention mechanism for prevention the determination mechanism from exerting a force on the supporting member.

Abstract: An optical apparatus is provided with an eyepiece, a focusing screen onto which an image is projected, a reflecting device for reflecting the light from the focusing screen to thereby cause it to enter the eyepiece in order to show the image, an illuminating device for illuminating an eye, an imaging optical system for receiving the light from the eye through the eyepiece and a certain portion of the reflecting device, and forming the image of the eye by the light from the eye, and a photoelectric converter for receiving the image of the eye. The reflecting device comprises a hollow optical part, and the light from the eye passes through the hollow portion and the mirror portion of the optical part.

Abstract: A viewfinder system includes an optical system for guiding, to an observer, light coming from an object, a liquid crystal display of transmission type provided in an optical path of the optical system, the liquid crystal display having transmittances which differ with wavelengths, and a transmittance uniforming coating provided in the optical path of the optical system, the transmittance uniforming coating making, substantially uniform irrespective of wavelengths, transmittances of light which has passed through the optical system and the liquid crystal display.