ROUGH AND FINE DRIVE COMPRISING A BELT DRIVE FOR A MONOCULAR, ESPECIALLY FOR A TELESCOPE

摘要

The invention relates to focussing optics that can be axially displaced along the optical axis in a housing by means of a rough and a fine drive, which is characterized in that the rough drive comprises a first belt drive by means of which the rough drive and the focussing optics actively cooperate with one another and in that a second belt drive is provided for connecting the fine drive and the focussing optics.