The high quality CNC manufactured OVL focuser with 10:1 reduction was developed for Schmidt Cassegrain telescopes. It takes 2″ and 1.25″ eyepieces. It enables a very soft adjustment of the focus with high precision thanks to the built-in gear reduction. The pull-out tube is provided with a scale. Scope of delivery: 2″ Crayford focuser adapter to 1.25″! Power supply and batteries are not included!