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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 . . .