Bobs Knobs Collimation Thumbscrews

Fits: Celestron PowerSeeker 127 telescopes.
Knobs: Black plastic, 16 mm (5/8”) diameter
Threads: Stainless steel

Fits: Celestron Starhopper (6”, 8”, 10”, 12”) Newtonian telescopes.
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Stainless steel

Fits: Meade Lightbridge telescopes (8”, 10”, 12”, 16”)
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Stainless steel

Fits: Celestron C6-N/NGT, C8-N/NGT, and C10-N/NGT Newtonian telescopes.
Primary collimation
Knobs: Black plastic, 16 mm (5/8”) diameter
Threads: Stainless steel

Fits: Celestron PowerSeeker 127 telescopes.
Primary collimation
Knobs: Black plastic, 16 mm (5/8”) diameter
Threads: Stainless steel

Fits: Meade 10 inch (25 cm) f/6.3 SCT versions (2120, LX10, LX50, LX100, LX200) which are marked f/6.3 WIDE-FIELD on the corrector ring
Knobs: Stainless steel, 19 mm (3/4 inch) diameter
Threads: Stainless steel

Fits: Meade 16” (41 cm) f/10 SCT versions with three screws on the secondary housing
Knobs: Stainless steel, 19 mm (3/4”) diameter
Threads: Stainless steel

Fits: Meade 16” (41 cm) f/10 SCT versions with six screws on the secondary housing. (Includes LX200ACF) The inner screws are for collimation.
Knobs: Stainless steel, 19 mm (3/4”) diameter
Threads: Stainless steel

Fits: Meade 6” (15 cm) f/10 SCT versions (ETX-LS, LS-6 SC and ACF, LT-6 SC and ACF)
Knobs: Stainless steel, 12 mm (1/2”) diameter
Threads: Stainless steel

Fits: Meade 8” (20 cm) f/6.3 SCT versions (2080, LX6, LX10, LX50, LX100, LX200) which are marked f/6.3 WIDE-FIELD (or a variation of this) on the corrector ring.
Knobs: Stainless steel, 12 mm (1/2”) diameter
Threads: Stainless steel

Fits: SkyWatcher (5”, 6”, 8”, 10”) Newtonian telescopes.
Primary collimation
Knobs: Black plastic, 16 mm (5/8”) diameter

Fits: Celestron Starhopper 12” (30 cm) f/5 Newtonian telescopes with open base (pictured)
Primary collimation
Knobs: Black plastic, 30 mm (1-1/4”) diameter, 5-point fluted

Fits: Meade Lightbridge10” (25 cm) f/5 telescopes.
Primary collimation
Knobs: Black plastic, 30 mm (1-1/4”) diameter, 5-point fluted
Threads: Plated steel

Fits: Meade Lightbridge12” (30 cm) f/5 telescopes.
Primary collimation
Knobs: Black plastic, 30 mm (1-1/4”) diameter, 5-point fluted
Threads: Plated steel

Fits: Meade Lightbridge 8” (20 cm) f/6 telescopes.
Primary collimation
Knobs: Black plastic, 30 mm (1-1/4”) diameter, 5-point fluted
Threads: Plated steel