Knobs: Black plastic, 9.5 mm (3/8”) diameter Threads: Stainless steel
Notes:
These knobs fit the Celestron 9.25” f/10 SCT with a Fastar secondary,
which has black Phillips factory collimation screws that are recessed
into the secondary housing. These versions may or may not have EdgeHD
optics.
Knobs include a set of long spacers so they clear the rotary cover.
The factory dust cover will fit normally with Bob’s Knobs installed.
The
rotary secondary cover must remain open when the knobs are installed.
The cover is cosmetic only and will not affect operation of the
telescope.
