The JMI Telescopes Event Horizon EV-1R is a 2" black-anodized aluminum focuser with rubber grip gold knobs. The focuser lifts up to 8 pounds. Dual-speed manual controls are over 15 times finer (small outer knob) and 1.5 times finer (large inner knob) than most rack-and-pinion focusers. The EV-1R mounts in many refractors with an inside diameter of approximately 3.5" or 3.75".
- Partial List of Refractor Telescopes that Should Accept the Focuser:
- Celestron: C4-R, C6-R, C6-RGT
- Firstscope 102
- Orion: AstroView 100 EQ / 120ST EQ, SkyView Pro 120
- Synta/ Sky-Watcher: (Pro Computerized): 100ED-EQ5P, 120ED-EQ5P, 120AR-EQ5P, 150AR-EQ5P, (Pro Manual) 102AR-EQ5M, (Pro Refractor OTAs) P80 ED-APO, P100 ED-APO, P120 ED-APO
- Vixen: ED100Sf