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Bobs Knobs Collimation Thumbscrews

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Fits: Celestron 11” (28 cm) f/10 SCT versions with flat secondary housing and metric collimation screw threads (most CPC 1100).
Knobs: Black oxide steel (black) or stainless steel (silver), 12 mm (1/2”) diameter
Threads: Black oxide or stainless steel

Bobs Knobs Celestron 11'' SCT Flat Secondary Metric Collimating Thumbscrews

ONLY £19.99

Fits: Celestron 5” (13 cm) f/10 SCT (C5, NexStar 5SE, Omni 127) with black Phillips factory collimation screws. These screws have metric threads. Will not fit scopes with silver factory collimation screws

Bobs Knobs Celestron 5'' f/10 SCT Metric Collimating Thumbscrews

ONLY £19.99

Fits: Celestron 6” (15 cm) f/10 SCT versions (C6-A-XLT, C6-GT, C6-S, C6-SE, C6-SGT, others)
Knobs: Black oxide steel (black) or stainless steel (silver), 12 mm (1/2”) diameter

Bobs Knobs Celestron 6'' f/10 SCT Collimating Thumbscrews

ONLY £19.99

Fits: Celestron 8” (20 cm) f/10 SCT with Fastar secondary and EdgeHD optics.
Knobs: Black-oxide steel, 12 mm (1/2”) diameter
Threads: Black oxide steel

Bobs Knobs Celestron 8'' Edge HD Collimating Thumbscrews

ONLY £19.99

Fits: Most Celestron 8” (20 cm) f/10 SCT made in 2005 and later with black Phillips factory collimation screws that have metric threads. Includes SkyWatcher SCT and non-EdgeHD Fastar.

Bobs Knobs Celestron 8'' f/10 Metric Collimating Thumbscrews

ONLY £19.99

Fits: Celestron 8” (20 cm) f/10 SCT with metric collimation screws and Hyperstar option.
Knobs: Black oxide steel, 12 mm (1/2”) diameter
Threads: Black oxide steel

Bobs Knobs Celestron 8'' SCT With Hyperstar Collimating Thumbscrews

ONLY £19.99

Fits: Celestron 9.25” (23.5 cm) f/10 SCT versions with metric screw threads (CPC 925). Not for C9.25 with “Trifid” Faster or EdgeHD optics

Bobs Knobs Celestron 9.25'' SCT Metric Collimating Thumbscrews

ONLY £19.99

Fits: Celestron C6-N/NGT, C8-N/NGT, and C10-N/NGT Newtonian telescopes.
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Stainless steel

Bobs Knobs Celestron C6N, C8N, C10N Secondary 30mm Collimating Thumbscrews

ONLY £19.99

Fits: Skywatcher Newtonian Reflector Telescopes
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Stainless steel

Bobs Knobs Skywatcher Newtonian Secondary Collimating Thumbscrews

ONLY £19.99

Fits: Celestron 14” (36 cm) f/11 SCT versions with metric thread factory Phillips collimation screws with Fastar and with or without EdgeHD optics.

Bobs Knobs Celestron 14'' Standard Phillips Metric Collimating Thumbscrews

ONLY £20.95
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Page 3 of 5:    47 Items