| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that optical equipment can not be miniaturized while maintaining specified attaching strength because it is constituted by attaching a focus ring attaching member to the equipment side by using a machine screw in focus ring attaching structure, and also a problem that a lens is stained by the infiltration of grease because a grease coating part and the lens are positioned near. SOLUTION: As for the focus ring attaching structure for optical equipment; the optical equipment having the lens to which the focus ring is attached through the attaching member is immune to external shock caused by vibration and dropping or the like and obtains coupling strength by which backlash is prevented by constitution that the attaching member and the optical equipment side are coupled by bayonet-coupling of plural key locking parts and projecting parts. Since the thickness of a member at a bayonet-coupling part need not be secured to be large, the entire structure is miniaturized (small-diameter) and a creeping distance leading to the lens from the grease coating part of the attaching member gets long, whereby the grease is hardly leaked and the staining of the lens by the grease is eliminated.
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