Celestron SkySync GPS Accessory - 93969 20 mm Eyepieces Features exclusive anti-reflection angle that

Features exclusive anti-reflection angle that prevents reflection back to the objective

Unit comes with one patented 2" / 1

1% anti-reflective coatings as on the Lunt h-alpha etalons

About the TeleVue Focusmate Driver - Universal

Celestron SkySync GPS Accessory - 93969 20 mm Eyepieces Features exclusive anti-reflection angle thatAbout the Celestron SkySync GPS Accessory At last a GPS for all computerized Celestron telescopes! Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope'''s drive base port. The Celestron SkySync GPS Accessory will link up and automatically download the exact time, date, longitude and latitude from one of many global positioning satellites. Celestron SkySync GPS Accessory Features 16 channel GPS module