A lens barrel includes a fixed cylinder fixed to an imaging device body, a lens-holding frame, and a movable cylinder for supporting the lens-holding frame movably in an optical axial direction, in which the movable cylinder is located at a position collapsed relative to the fixed cylinder in a non-imaging mode while the movable cylinder is extended from the collapsed position to a zooming region in an imaging mode, and then the movable cylinder moves in the optical axial direction within the zooming region.

 
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< Optoelectronic device

< Downsize, high performance, and wide range magnification zoom lens and camera apparatus

> Preform for an optical lens, an optical lens, and a method of manufacturing an optical lens

> Image pick-up lens

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