JMI EV3-N Standard Event Horizon Telescope Focuser - Newtonian

JMI EV3-N Standard Event Horizon Telescope Focuser - Newtonian Base A masterpiece of engineering and workmanship, the JMI Dual-Speed Event Horizon Telescope Focuser is a low-profile, friction-drive focuser designed for the discriminating astronomer. The highly acclaimed Crayford design uses pressure on a metal drive shaft pressing against a machined 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 such as the rack-and-pinion focuser, and allows for very fine adjustments. Zero image shift and zero backlash makes this focuser fantastic for visual and CCD imaging (even better for imaging is our EVRZ versions). Take the frustration out of focusing your telescope! Single speed friction drive Compression ring (for secure mar-free holding of eyepieces and cameras) ZERO image shift Friction drive for backlash free focusing CNC Machined Crayford Design Dra