JMI EV-3 Telescope Focuser EV3NM
Item No. 765-61309
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Manuf. No. JMI EV3NM
The 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 1ý times finer than most rack-and-pinion focusers.
The Newtonian version (EV-3n) mounts on a range of surfaces from a 7.25" diameter, or larger, tube to a flat surface.
The Cassegrain version (EV-3c) 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 motorized version comes with a hand control unit.
See the Differences Between Models, the EV Options, the Focuser Accessories Page, the SCT Accessories Diagram and the Focuser Comparison Chart. For additional equipment see the Smart Focus and DRO products. (Specify all options and accessories when ordering.)
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.
The EV-3c focuser can also be mounted on any 2" drawtube by first inserting the mounting adapter (ADPT2THREAD, included)