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Bob's Knobs Collimation Knobs Celestron 8



Fits most Celestron 8 inch (20 cm) f/10 SCT made in 2005 and later with black Phillips factory collimation screws that have metric threads, including the Fastar version. Includes Skywatcher SCT. Not for the 8 inch EdgeHD.

Note1: These knobs will fit most 2005 and later C8 models that have black Phillips factory collimation screws. This includes the C8 Fastar with black Phillips factory collimation screws. Do not use these knobs on the 8 inch EdgeHD OTA; this model requires different knobs.

Note 2: Most models with black Phillips factory collimation screws require C8 metric knobs. A few post-2005 scopes have black Phillips collimation screws with standard threads. Make sure the knob threads match the factory screw threads before installing the knobs.

Note4: Some telescope versions have a small plastic cover over the factory collimation screws. This cover must be removed and set aside when Bob's Knobs are installed. The cover is cosmetic only and will not affect operation of the scope.


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