An assembly-stage focus adjustment mechanism of a zoom lens barrel including a plurality of lens groups which are moved while distances therebetween are changed to perform a zooming operation, the assembly-stage focus adjustment mechanism including two lens fixing frames to which two of the plurality of lens groups are fixed, respectively; two moving frames which linearly move in an optical axis direction during the zooming operation, the two moving frames being respectively screw-engaged with the two lens fixing frames; and a rotational-direction integrating device which makes the two lens fixing frames rotate as one integral body in a direction of rotation relative to the two moving frames when an assembly-stage focus adjustment operation is performed.

 
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< Camera having a through the lens pixel illuminator

> Auto-focusing zoom lens mechanism

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