Nikon Corporation

Hideaki Hoshikawa

Masanori Hasuda

Noriyasu Kotani

Toshinori Take

An accessory mount can be inserted through the camera body mount without any of the first through third tabs being hindered by any of three camera body-side tabs at the camera body mount, as long as the accessory mount is inserted into the camera body mount at a correct interlock phase. The first, second, and third tabs extend over varying lengths along the circumferential direction. The first tab extends over a greatest length and the third tab extends over a smallest length, along the circumferential direction. The accessory mount includes a restricting member, a fitting portion, and a lock pin hole. The restricting member is disposed at a position assumed on a side substantially opposite from the lock pin hole across the fitting portion.

Camera accessory

A camera accessory can be detachably engaged with a camera body that includes a camera body mount, and is equipped with an accessory mount assuming a bayonet structure with a first tab, a second tab and a third tab set over intervals in a circumferential direction running along a circumference of a circle and projecting from the circumference along a radial direction. The accessory mount can be inserted through the camera body mount without any of the first through third tabs being hindered by any of three camera body-side tabs at the camera body mount, as long as the accessory mount is inserted into the camera body mount at a correct interlock phase. The accessory mount includes a restricting member disposed near the third tab.

Camera accessory, camera accessory mount, camera body and camera body mount

An accessory mount can be inserted through the camera body mount without any of the first through third tabs being hindered by any of three camera body-side tabs at the camera body mount, as long as the accessory mount is inserted into the camera body mount at a correct interlock phase. The first tab, the second tab and the third tab extend over varying lengths along the circumferential direction. The first tab extends over a greatest length along the circumferential direction among the first through third tabs. The third tab extends over a smallest length along the circumferential direction among the first through third tabs. The accessory mount includes a restricting member disposed near the third tab, a fitting portion used to align an optical axis of the accessory mount with an optical axis of the camera body, and a lock pin hole through which a lock pin, retractably disposed at the camera body, is inserted so as to lock the camera accessory in a fully mounted state. The restricting member is disposed at a position assumed on a side substantially opposite from the lock pin hole across the fitting portion.

A camera system having a predetermined image circle, comprises: an interchangeable lens having a lens mount portion; and a camera body having an image sensor that is disposed within that image circle, and a body mount portion, wherein, when a radius of circular portion at a maximum internal diameter part of an opening portion of the lens mount portion is termed rM, a flange back that is a distance from the lens mount portion to a light reception surface of an image sensor in a state that the interchangeable lens and the camera body are mutually engaged is termed da, and the diameter of the image circle is termed D, the following equations are satisfied:14.0 mm&#x2266;2rM&#x2266;40.0 mm&#x2003;&#x2003;Conditional Expression #116.0 mm&#x2266;da&#x2266;20.0 mm&#x2003;&#x2003;Conditional Expression #214.0 mm&#x2266;D&#x2266;20.0 mm&#x2003;&#x2003;Conditional Expression #3.

Camera system, interchangeable lens and method of manufacturing interchangeable lens

An accessory side mount of the camera accessory includes at least a first limiting portion and a second limiting portion that is different from the first limiting portion. When the first through third claws are rotated in a first rotational direction along the circumferential direction in order to install the accessory side mount that has been inserted in the proper installation and detachment rotational phase into the body side mount, the first limiting portion limits a range of rotation in the first rotational direction by abutting an end surface of one of the camera body side claws. When the first through third claws are rotated in a second rotational direction along the circumferential direction that is opposite to the first rotational direction in order to detach the accessory side mount from the body side mount, the second limiting portion limits a range of rotation in the second rotational direction by abutting an end surface of one of the camera body side claws.

Providing an imaging apparatus wherein dust does not easily adhere to the imaging portion. The apparatus comprising an imaging portion provided with an image pickup device, a first housing holding the imaging portion, a protective cover disposed a photographic object side, a second housing holding the cover and provided with a mount structure, to attachably and removably mount interchangeable lenses at the photographic object side, and wherein an airtight space is formed by at least one of the first and the second housings, the imaging portion, and the cover.

Imaging apparatus with a camera body whereon an interchangeable lens can be removably mounted

A camera accessory is detachably engaged with a camera body including a camera body mount and body-side electric contact points. The camera accessory includes a camera accessory mount assuming a bayonet structure with a first tab, a second tab and a third tab. The camera accessory mount is configured to be inserted through the camera body mount without any of the first through third tabs hindered by three camera body-side tabs disposed at the camera body mount as long as the camera accessory mount is inserted at the camera body mount at a correct interlock phase. The camera accessory mount is configured such that insertion of the camera accessory mount through the camera body mount is disallowed at any phase other than the correct interlock phase with at least two tabs among the first through third tabs coming into contact with at least two of the camera body-side tabs.

A camera accessory is equipped with an accessory mount assuming a bayonet structure with first through third tabs set over intervals along a circumference and projecting from inside of the accessory toward the outside. The mount is structured so that insertion of the mount is allowed when the mount is inserted at a correct interlock phase without any of the first through third tabs contacting any of three camera body-side tabs, and that insertion of the mount is disallowed if the accessory mount is positioned at an incorrect interlock phase with at least two tabs contacting at least two of the camera body-side tabs. The first through the third tabs extend along varying lengths along the circumference. When the first tab and either other tab contacts two of the camera body-side tabs at a total of two contact locations, the first tab contacts near the second side end.

Growing community of inventors

Koshigaya, Japan

Hideaki Hoshikawa