JMI - NGF-XTC with Motor

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The NGF-XTC is specifically designed for Cassegrain telescopes (10" to 16").

Manufactured by:
Jims Mobile, Inc. (JMI)

Product Description

JMI - Model NGFXTCM  Crayford Focuser with Motor (Cassegrain scopes)


For the ultimate focusing system adding this motor upgrades a manual NGF focuser to a motorized focuser.  It includes the motor and any necessary mounting hardware as well as a hand control unit.

The Next Generation Focuser (NGF) is a low-profile, friction-drive focuser designed for both the amateur and professional .  The highly acclaimed Crayford design  permits tolerances up to 100 times better than conventional rack-and-pinion focusers.  Zero image shift and zero backlash makes it fantastic for visual and photographic work and a must for CCD imaging.

The NGF-XTc is specifically designed for Cassegrain telescopes (10" to 16").  The most popular type of Cassegrain telescope is the Schmidt-Cassegrain Telescope (SCT).  These telescopes achieve focus by moving the primary mirror.  This design tends to create image shift which is especially problematic for CCD imaging.  The NGF-XTc achieves focus by moving the eyepiece, camera or other equipment at the back of the telescope instead of the mirror.

The NGF 3" focusers include a compression ring in the drawtube for holding eyepieces and accessories without scratching the equipment.  The adjusting screw presses against the ring which tightens around the eyepiece or accessory.



Name JMI - NGF-XTC with Motor
Manufacturer Jims Mobile, Inc. (JMI)


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