Celestron Motorized Focuser Problems & Fixes

Celestron's motorized focuser has a flaw in the hardware used to attach it to the telescope which is responsible for the reports of the focuser binding, screws coming loose and wild focus motor re-winds. But most people do not realize that this flaw also causes excess mirror flop (not focus shift) leading to a significant drift of the image over time. In this video, we expose the flaw and show you two ways to totally fix it so that the focuser works as intended and adds no additional mirror flop. We will also show you how to extend the focus travel so that you have sufficient travel at f/7 to get a fine focus.

This is the companion video to two videos posted previously:
1. Celestron 11" SCT Tear Down video    • Celestron C11 SCT Disassembly  

2. Celestron 11" SCT Modification: To be released soon

Link to the Celestron complete disassembly video    • Celestron C11 SCT Disassembly  

The following links to my favorite astronomy equipment suppliers are affiliate links which allow me to earn a commission on purchases with no cost to you. If you would like to support my channel and its content please consider using my links when ordering your astronomy equipment especially if you were inspired by my video.

High Point Scientific https://bit.ly/3YvqU4X
Agena Astro https://bit.ly/434LUSu


Celestron Motorized Focuser
High Point Scientific https://bit.ly/3SlbyNo
Agena Astro https://bit.ly/3WMdtO9

Other Focuser Brands
High Point Scientific https://bit.ly/3CbrmfT
Agena Astro https://bit.ly/3ota8qq

Celestron SCT
High Point Scientific https://bit.ly/3ReN9aN
Agena Astro https://bit.ly/3WvjBtE