Patent ID: 7802931

Claim:
A lens accessory mounting device for mounting a lens accessory to a front end of a lens barrel having an optical axis, an outer diameter of said lens accessory being substantially the same as an outer diameter of said front end of said lens barrel, said lens accessory mounting device comprising: at least one inward bayonet lug which projects radially inwards from an inner peripheral surface of a cylindrical sleeve portion of a front end of the lens barrel, the at least one inward bayonet lug being spaced from ends of the cylindrical sleeve portion in an optical axis direction; and at least one outward bayonet lug which projects radially outwards from a surface of said lens accessory that is recessed from an outermost peripheral surface of said lens accessory to be engageable with said at least one inward bayonet lug, respectively, wherein said at least one outward bayonet lug is firstly inserted into said front end of said lens barrel and subsequently brought into engagement with said at least one inward bayonet lug, respectively, when said lens accessory is mounted to said front end of the lens barrel.