Fine Focus Knob for Celestron 8" and 9.25" SCT
This large 70 mm (2.76 in) diameter knob slides over your stock focuser giving you fine focusing detail focusing & fast coarse focusing at the same time!
- Stock focus knob alone: 5 mm turn = 26° focus change.
- Fine focus knob: 5 mm turn = 8° focus change.
Larger focus knob perimeter gives you the finer focus for planets and stars that the stock focus is lacking. Over 3 times finer focusing than the stock focus knob. Also the stock knob is always available at the ready for quick coarse focus changes.
FITS: Celestron 8" SCT, Celestron 9.25" SCT telescopes.
As the product pictures suggest, your focus knob should be black and made of rubber. This is not designed to fit older all-metal focus knobs.
Inside diameter: 22mm, fits +/- 2mm
Outside diameter: 70mm
Images shown on Celestron Evolution 8" - Color is Galaxy Black
*Fine Focus Knob for Celestron SCT Telescope by jggall01 is licensed under the Creative Commons - Attribution license. Thingiverse thing:2011552
Condition is Brand new.
Made in USA