A. Knobs for Orion Optics OD Secondary
Part: CNsec35 or ODsec45
Fits: Orion (UK) OD-series secondary
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Stainless steel (35 mm length); Zinc-plated steel (45 mm length)
Notes:
- The knobs must clear the secondary housing, as shown in the photo. Order knobs with the correct screw length, either 35 mm or 45 mm. Knobs with 35 mm screws will fit most of these telescopes.
$20.95