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Orion Collimation Knobs

4 Items

Bob's Knobs Secondary Collimation Knobs for Orion OD Newtonians & C6, C8, and C10- CNSEC35

SKU: BOB-CNSEC35
  • These 35 mm long 4-Vane Phillips Secondary Collimation Knobs from Bob's Knobs fit a wide range of mass produced Newtonian reflector telescopes such as the Meade LightBridge and Astro-Tech Imaging Newtonian.
  • Each knob in this set measures 13 mm or 1/2" in diameter.
  • Made from black plastic with stainless steel threads.
  • Compatible with Celestron 6", 8", and 10" Newtonian reflectors as well, whether they contain GoTo electronics or not.
$20.95

Bob's Knobs Collimation Knobs for Orion SkyQuest XT Secondary with 25 mm Screw Length - CNSEC25

SKU: BOB-CNSEC25
  • These Bob's Knobs collimation knobs fit Orion SkyQuest XT Newtonian reflector telescopes with 25 mm long factory collimation screws.
  • Each knob in this set measures 13 mm or 1/2" in diameter.
  • Made from black plastic with stainless steel threads.
  • Compatible with 6", 8", 10", 12", and 16" Orion SkyQuest XT reflectors with 4-vane spider secondary, as well as older model 6", 8", and 10" Orion SkyQuest XT reflectors with 3-vane spider secondary.
$20.95

Bob's Knobs Collimation Knobs for Skywatcher 190mm Mak-Newtonian Primary - MN190PRI

SKU: BOB-MN190PRI
  • This Bob's Knobs primary collimation knob set is designed to fit Sky-Watcher 190 mm Maksutov-Newtonian telescopes.
  • Both the collimation knobs and the lock knobs measure 16 mm or 5/8" in diameter and contain stainless steel threads.
  • Set includes black plastic primary collimation knobs and red plastic primary lock knobs.
  • Knobs must be staggered in height due to the factory collimation and locking screws being so close together.
$25.95

Bob's Knobs Collimation Knobs for Skywatcher 190mm Mak-Newtonian Secondary - MN190SEC

SKU: BOB-MN190SEC
  • Measuring 13 mm or 1/2" in diameter, these Bob's Knobs secondary collimation knobs fit SkyWatcher 190 mm Maksutov-Newtonian telescope.
  • Made from black plastic with stainless steel threads.
  • Mounted on long screws in order to clear the secondary lip.
  • Secondary collimation screws from the factory must be removed prior to installation of these knobs.
$20.95