Celestron Focus Motor for SCT and EdgeHD OTAs 94155-A

Celestron 94155-A Overview Updated to be compatible with more of their optical tube assemblies (OTAs), Celestron's Focus Motor v2 eliminates vibrations and helps you achieve finer and more precise focusing on select SCT (Schmidt-Cassegrain telescope), EdgeHD, RASA (Rowe-Ackermann Schmidt Astrograph), or 7" Mak (Maksutov-Cassegrain) models. Once installed on the OTA, the unit plugs into the auxiliary port on your Celestron mount, which not only provides the power, but allows it to be controlled by the mount's NexStar+ or StarSense computer hand controller running the current firmware version. If your mount isn't compatible with the Focus Motor, you can opt to control it from a Windows computer with the addition of an optional USB cable or 12 VDC power adapter. Helpful for visual observation and indispensable for astrophotography, a precise DC servo motor delivers three speeds low 8 /sec, medium 32 /sec, high 128 /sec without vibration or noise. Using an electric focuser eliminates the need to touch knobs, which cause vibration, and allows a level of precision that hand focusing is usually unable to achieve. You can use many types of astronomy telescope control software that have focuser control by using the Celestron Unified ASCOM mount driver that is available as a free download. Celestron also offers a free download for Windows that will enable direct control of the focus motor without the need for an ASCOM driver. Use of them does not imply any affiliation with or endorsement by them.