USED Event Horizon EVR Focuser

This focuser is in good condition. Comes with hand controller and original quick-start guide.

Description

A masterpiece of engineering and workmanship, our Event Horizon Telescope Focusers are a low-profile, friction-drive focuser designed for Newtonian and Cassegrain telescopes. The highly acclaimed Crayford design uses high pressure on a metal drive shaft pressing against a metal drawtube which is held by bearings on the opposing side. This direct surface-to-surface drive mechanism eliminates backlash and shifting of the drawtube as seen in other designs, and allows for very fine adjustments. Zero image shift and zero backlash makes this focuser fantastic for visual and photographic work and a must for CCD imaging.

Features of the EVR model:

• Pusher Bearing
• Rubber-Gripped Gold Knobs
• Integrated high precision motor and control system that gives 8.1x10-6 in. (.2 micron) focus step position precision