Bob's Knobs Celestron SCT 11” f/10 metric (black oxide)

Bob's Knobs for C11 f/10 with Flat Secondary Housing: Precision Collimation Made Simple Specialized for Celestron C11 f/10 Telescopes: Crafted for Celestron 11” (28 cm) f/10 SCTs with flat secondary housing and metric collimation screw threads, commonly found in most CPC 1100 models. Part Options - Part: C11metBO and C11metSS: Telescope Compatibility: Perfectly fits specific Celestron 11" f/10 models, excluding those with Starizona Hyperstar secondary. Knob Variants: Available in black oxide steel (black) or stainless steel (silver), each knob is 12 mm (1/2”) in diameter for easy adjustments. Thread Material: Choose between black oxide or stainless steel threads for matching your telescope's requirements. Selection Guide: Identifying Screw Threads: Check whether your telescope has metric or standard thread screws; our hints will assist in identifying the correct type. Environmental Considerations: Black Oxide Steel: Ideal for dry environments; periodic oiling recommen