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

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

Manufacturer : Bob's Knobs
Part Number : BK CNS11

Knobs for Celestron 11 inch (28 cm) f/10 SCT w/"Trifid" Fastar™ secondary housing.

Most Celestron 11 inch (28 cm) carbon fiber tube and some metal tube SCTs have the Trifid rotary cover Fastar secondary housing. Most metal tube and some carbon fiber tube SCTs require knobs for the flat secondary housing. Do not use knobs for the Trifid Faster secondary on the flat secondary. The screws on these knobs are too long.

The rotary secondary cover must remain open when knobs are installed. The cover is cosmetic only and will not affect operation of the telescope.

$19.95

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