Starlight Instruments Feather Touch Micro Focuser for Celestron C11
Starlight Instruments Feather Touch 10:1 Micro Focuser Upgrade for Celestron C11 Tubes
(NOT COMPATIBLE with CPC1100 telescopes)
If your telescope is less than a few years old, check the style of the back cell to see which version of the Feather Touch® SCT Micro Focuser you need: If your telescope has a flat back (left picture), you need the standard "C" Micro Focuser. If your telescope has a triangular pattern on the back (right picture), you will need the "CPC" version of the Micro Focuser.
WATCH ON YOUTUBE:
Feathertouch SCT Dual Rate MicroFocuser Installation on Celestron CPC800 EdgeHD Tube