Bob's Knobs
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3 Collimating knobs for Celestron 11" SCT with flat secondary housing
$19.95These no-tool collimation knobs fit most aluminum optical tube versions of the Celestron C11 Schmidt-Cassegrain (those with a flat secondary housing) . . . -
3 Collimating knobs for Celestron 11" SCT with Trifid secondary (not Edge HD)
$19.95These no-tool collimation knobs fit late model aluminum optical tube and most carbon fiber optical tube versions of the Celestron C11 Schmidt-Cassegrain (those with a partially raised "Trifid" housing that rotates to cover and uncover the collimation screws) . . . -
3 Collimating knobs for Celestron C14 w/Allen or slotted collimation screws
$19.95These no-tool collimation knobs fit those Celestron C14 Schmidt-Cassegrain telescopes that use Allen or slotted-head collimation screws (including those with a partially raised "Trifid" housing that rotates to cover and uncover the collimation screws) . . . -
3 Collimating knobs for Meade 16" LX200 with three collimating screws
$25.95These no-tool collimation knobs fit older Meade 16" LX200 Schmidt-Cassegrain telescopes with a 3-screw secondary . . . -
3 Collimating knobs for metric Celestron 9.25" CPC 925 SCTs
$20.95These no-tool collimation knobs fit the metric thread versions of the Celestron CPC 925 9¼" Schmidt-Cassegrain . . . -
3 Collimating knobs | Meade 16" LX200 with six screw secondary
$25.95These no-tool collimation knobs fit recent Meade 16" LX200 Schmidt-Cassegrain telescopes and current 16" LX200R Advanced Ritchey-Chrétien telescopes with a 6-screw secondary . . . -
6 Collimating and locking knobs for Meade 12" Lightbridge Dobsonian primary mirror
$29.95These no-tool collimation and locking knobs fit the primary mirror of the Meade 12" LightBridge Dobsonian reflector telescope . . . -
Bob's Knobs 3 Collimating knobs for Astro-Tech 10" RC astrograph secondary mirror
$25.95These no-tool collimation knobs fit the Astro-Tech 10" Ritchey-Chrétien astrographs only . . . -
Bob's Knobs 3 Collimating knobs for Astro-Tech 12" RC astrograph secondary mirror
$25.95These no-tool collimation knobs fit the Astro-Tech 12" Ritchey-Chrétien astrographs only . . .