JMI Event Horizon Robotic Telescope Focuser - Cassegrain

Building on the excellent base of our Even Horizon focuser, we spent several years perfecting it's transformation into a completely robotic version for astro-imaging.  This version of our focuser features an integrated high precision motor and control system that gives 8.1x10-6 inch (.2 micron) focus step position precision.  We deliver 10 times finer control than comparable focusers.

In addition to fine motor control with position feedback it is ASCOM compatible and can be controlled with many of the popular astro-imaging software packages that you may already own.  The system comes with easy to install drivers for instant connectivity.

Compatible with 6″ to 16″ Cassegrain telescopes (e.g. SCT and Mak-Cas) with standard output threads.The focuser gives 1/2″ of travel and is designed for fine focus after rough adjustment with the normal telescope focusing knob. Weight is 1.4 pounds without the controller.

Comes with a USB stick with the ASCOM driver and instructions.

Download Drivers

Comes with no optical adapters so that you can select the optional adapter(s) you need, if any.

Select JMI Combination 1.25-inch Eyepiece and T-Thread Adapter, ADPT2-1.25T for camera use. JMI Adapter for mounting a CCD or other camera, with a standard T-thread, into a 2" drawtube. It also doubles as a 1.25" adapter. A T-adapter holds a CCD camera more securely than a standard 1.25" adapter. The adapter uses a compression ring to secure inserted equipment. It includes standard 48mm filter threads on the other end of the adapter (inserted into focuser end).

Select Lumicon 2 Inch Male - SCT Male Adapter, LA1060 to attach SCT threaded accessories. Lumicon 2 Inch Male - SCT Male Adapter drops into 2″ telescope eyepiece holders and presents male SCT threads (2″ x 24 tpi) for Schmidt-Cassegrain telescope accessory attachment (SCT diagonal, for example). Includes 2″/48mm filter threads.

Select Farpoint 2 Inch Focuser to 1.25 Inch Eyepiece Adapter, FAV100 for a visual 2" to 1.25" eyepiece adapter. Farpoint 2 Inch Focuser to 1.25 Inch Eyepiece Adapter features a non-marring compression ring for precise centering of telescope eyepieces. Threaded for both 2 inch and 1.25 inch filters and has a stop to prevent long eyepieces from damaging filters.