Lens barrel and method of assembling the same

摘要

A lens barrel includes a zoom frame for holding a first-group frame and a second-group frame that is held so as to advance and retract in the inner peripheral portion of a second zoom frame. Three follower pins are implanted in the second-group frame, and each of the follower pins includes a flange portion and a thrust abutment portion. The flange portions of the three follower pins are interposed between the outer periphery of the second-group frame and the inner periphery of the zoom frame. The decentering of the optical axis of the second-group frame is adjusted by the difference of the thicknesses of the flange portions. Further, since the thrust abutment portions of the three follower pins abut on the rear end surface of the insertion grooves of the zoom frame, the inclination of the optical axis of the second-group frame is adjusted by the difference of the outside diameters of the thrust abutment portions. In this lens barrel, the position and the inclination of the optical axis of lenses can be easily adjusted by selecting and mounting follower pins.