Celestron Feathertouch SCT Microfocuser Installation Instructions Manual

Installation Instructions – Celestron 11” Telescopes

Important:

removing the original focus assembly. If the telescope is not horizontal the primary
mirror could move during the installation.

Required Tools: Phillips Screwdriver

The telescope optical tube must be positioned horizontally before

1/16” Hex-Head Wrench (Not required for NexStar 11 GPS)

Step 1

NexStar 11 GPS telescopes have a rubber knob which can be pulled off. Older 11"
telescopes will have a metal focus knob which must be removed using a 1/16” hex-head
wrench to loosen a small set screw. Once the knob is removed you will see the brass
focus shaft as shown below.

Remove Focus Knob

Step 2

Turn the brass focus shaft clockwise to bring the mirror back and expose the Phillips­head screw at the end of the threaded focus rod.

Move Primary Mirror Back

Step 3

Use screwdriver to remove the small Phillips screw from the end of the threaded focus
rod.

Remove Set Screw