Bob's Knobs Collimation Knobs for Celestron 11 inch (28 cm) w/Flat Secondary Housing

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Bob's Knobs Collimation Knobs for Celestron 11 inch (28 cm) w/Flat Secondary Housing

Manufacturer : Bob's Knobs
Part Number : BK C11

Knobs for Celestron 11 inch (28 cm) f/10 SCT w/flat secondary housing.

Most Celestron 11 inch (28 cm) metal-tube and a few carbon fiber tube SCTs have the flat secondary housing. Some recent metal tube and most carbon tube models require knobs for the "Trifid" Fastar secondary housing. Do not use knobs for the Trifid Faster secondary on the flat secondary. The screws on these knobs are too long.

$19.95

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