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

(Only 3 Left)
SKU: BOB-CNSEC25
$27.95
 

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

Black plastic 13 mm diameter collimation knobs with stainless steel threads for Orion SkyQuest XT series secondary. Fits the following Orion SkyQuest XT Newtonian Telescopes. These knobs are designed to be used with telescopes featuring a factory collimation screw length of 25 mm. This is measured below the head and can be either 25 mm or between 32 mm and 35 mm. Be sure to take this measurement or you may wind up with the wrong screw length for your system.

  • Orion SkyQuest XT 6", 8", 10", 12" & 16" Newtonians with 4 vane spider secondary featuring a deep concaved central screw and four factory Phillips collimation screws. Secondary plate that holds the screws is 20 mm (3/4") thick.
  • Earlier made Orion SkyQuest XT 6", 8" & 10" Newtonians with 3 vane spider secondary featuring a shallow concaved central screw and four factory Phillips collimation screws. Secondary plate that holds the screws is 6 mm (1/4") thick.