Bob's Knobs

3 Item(s)
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  1. 3 Collimating knobs for Celestron 11" SCT with flat secondary housing

    $19.95
    These no-tool collimation knobs fit most aluminum optical tube versions of the Celestron C11 Schmidt-Cassegrain (those with a flat secondary housing) . . .
  2. 3 Collimating knobs for Celestron 11" SCT with Trifid secondary (not Edge HD)

    $19.95
    These 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. 3 Collimating knobs for Celestron C14 w/Allen or slotted collimation screws

    $19.95
    These 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 Item(s)
Set Descending Direction