Binocular including focus and diopter adjustment of different lens groups

摘要

A binocular includes two telescope systems. Each telescope system includes an objective system, an erecting system, and an eyepiece system. The binocular also includes a focus adjusting actuator and a focus adjusting knob, as well as a diopter correction actuator and a diopter correction knob. A guide member guides the focus adjusting actuator and the diopter correction actuator to be aligned along an optical axis of one of the telescope systems.