Celestron Feathertouch SCT Microfocuser, Инструкция по установке

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Step 2
Move Primary Mirror Back
Turn the brass focus shaft clockwise to bring the mirror back and expose the Phillips-
head screw at the end of the threaded focus rod.
Step 3
Remove Set Screw
Use screwdriver to remove the small Phillips screw from the end of the threaded focus
rod.