Camera accessory

Abstract

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.

What is claimed is: 
     
         1 . A camera accessory that can be detachably mounted at a camera body that includes a camera body mount, and includes 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 with a predetermined diameter and projecting from the circumference along a radial direction, wherein:
 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 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; and   the restricting member is disposed at a position assumed on a side substantially opposite from the lock pin hole across the fitting portion.