Lens mechanism for inserting a lens has an outer tube body, an adjusting ring, stops to fix the rear end position for moving the adjusting ring, a lens holder and a fixing ring

摘要

An outer tube body (12) moves along an optical axis. An adjusting ring (2) fits in the tube body and is guided along the optical axis without turning. Stops (2c,3c) fixes the rear end position for moving the adjusting ring in relation to the outer tube body. A lens holder (1) screws into the adjusting ring and holds a first group of lenses (LG1). A fixing ring (3) fastens on the outer tube body.