FTF2015 Focus Adapter for Celestron SCT with Large Thread | Feather Touch from Starlight

With a large SCT, you move a large head mirror using the standard button, and the image often shifts just as you almost focus. With this FTF2015 adapter for Celestron with the large threaded connection, you attach a Feather Touch FTF2015 from Starlight Instruments to the rear of the telescope. This way, you can fine-tune focusing with the focus ring.

The large screw thread can be found on the larger Celestron SCTs, such as the C11 on CGEM II mounting. Celestron also uses a small size, so measure the rear connection if you are unsure.

Also check if your focuser is really an FTF2015, because this adapter is made for that. On planets you notice the difference most. For example, read What you can expect from Jupiter.

For Celestron telescopes with the small screw thread there is the FTF2015 adapter for the small wire.