Jims Mobile (JMI) EV-3 Event Horizon 2 Inch Crayford Telescope Focusers

The JMI Event Horizon EV-3 is a 2" black-anodized aluminum focuser with knurled knobs.  The focuser lifts up to 4 pounds.  Manual control is over 1 1/2 times finer than most rack-and-pinion focusers.

The Newtonian version mounts on a range of surfaces from a 7.25" diameter, or larger, tube to a flat surface.

The Cassegrain version is designed for use on 6" to 16" Cassegrain telescopes (e.g. SCT and Mak-Cas) with standard output threads.  It includes an SCT threaded output adapter to allow use of standard SCT equipment on the output side of the focuser.  The focuser gives 1/2" of travel and is designed for fine focus after rough adjustment with the normal telescope focusing knob.

The Refractor version mounts in many refractors having one of two different inside diameters of approximately 3.5" and 3.75".  The following is a partial list of refractors 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

The Motorized version comes with a hand control unit.  Note:  Although the EV-3c can be plugged into the telescope's base allowing control from the Meade hand unit, you will have better control with the JMI hand unit.  Our hand unit includes an electronic brake (not included in Meade systems), which stops the motor as soon as you quit pressing the keys, and linear voltage control for superior speed control.  Also, older LX200 telescopes do not have enough power to properly run the motor on the low setting.