Orion - 90mm ID Tube Rings

  • Set of two cast aluminum telescope tube rings with quick-release, hinged clamp knobs and felt lining
  • One tube ring has 1/4"-20 piggyback camera adapter post; the other has threaded 1/4"-20 socket
  • Set of two telescope tube rings with mounting bolts and washers included
  • Use with EQ-1, EQ-2, EQ-3, or AZ-3 telescope mounts
  • Inside ring diameter is 90mm

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