Light screen for objective lens tube - has cylindrical light screen element, screening light path between objective lens groups against ambient light

摘要

The objective lens tube has several lens groups (L1,2) mutually adjustable in the optical axis direction. The cylindrical light screen element (61), screens the light path between the objective lens groups against the ambient light. The relative movement of the objective lens groups provides an elastic extension of the element, or its contraction. One end of the element is fitted with a holder (63). Pref. there are objective lens sockets (11,21) movable in the optical axis direction. USE/ADVANTAGE - For all types of camera objective lenses, with effective screening by a small and simple structure.