REAR FOCUS TYPE ZOOM LENS CYLINDER USING OPTICAL VIEW FINDER CYLINDER

摘要

Disclosed is a zoom lens body tube, adopting optical viewfinder body tube, of rear focus process. A beam splitter (12) and a light receiving elements (10) is installed at the rear part of the zoom lens body tube unit (A). At the rear part of the zoom lens unit (A) of body tube, the optical viewfinder unit (B) of body tube is connected on a optical axis that separated by the beam splitter (12). The focus plate (22) and the focus body tube (23) is installed in the optical viewfinder unit (B) of body tube.