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Orion Tube Rings for Optical Tube Assemblies
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  • Our cast-aluminum telescope tube rings feature quick-release, hinged clamp knobs and a felt lining for safe and secure attachment your telescope to an astronomy mount and tripod
  • One of the two tube rings in each pair features a 1/4"-20 piggyback camera adapter, the other has a threaded 1/4"-20 acceptor
  • The piggyback camera adapter can be removed in order to mount an adapter plate on top of the tube rings for astrophotographic use
  • Each pair of tube rings includes mounting hardware - requires a dovetail mounting plate (sold seperately) for attaching tube rings to Orion AstroView, SkyView Pro, Sirius, and Atlas equatorial mounts, and Orion SkyView AZ, VersaGo II, and TeleTrack AZ-G altazimuth mounts
  • Tube ring inside diameter is listed - choose the size that matches the outside diameter of your telescope tube

Orion Tube Rings for telescope Optical Tube Assemblies come as a set of two with quick-release, hinged clamp knobs for easy installation on your favorite telescope. Each tube rings features a felt lining to keep your telescope optical tube free of scratches. Mounting bolts and washers are included with each set of tube rings. A threaded piggy-back camera adapter is integrated on one of the two tube rings in each set. Many different sizes are available for almost any telescope.

Set of two rings includes mounting bolts and washers. Inside diameter (ID) is listed. Choose the size that matches the outside diameter of your telescope tube. See compatibility table below.

Tube Ring Reference Table
Item # Ring Inside Diameter (ID) Rings Fit
7369 76mm/3.0" Orion Observer 70 refractor telescope
7370 90mm/3.5" Orion AstroView/Explorer 90 Refractor Telescopes, Orion ShortTube 80 Refractor Telescope, 80mm f/11 telescope optical tube assembly
7371 100mm/3.9" Orion AstroView 100 Refractor Telescope, StarMax 90, Orion SkyView Pro 100mm Refractor Telescopes, Orion 80mm ED Refractor Telescopes, 100mm f/6 telescope optical tube assembly
7372 116mm/4.6" Orion Apex 102 Maksutov-Cassegrain Telescope, Orion AstroView 120/120ST Refractor Telescopes, 120mm f/5.0 and f/8.3 telescope optical tube assemblies
7373 140mm/5.5" Orion ShortTube 4.5 Reflector Telescope, Orion StarBlast 4.5 Astro Reflector Telescope
7374 144mm Orion Apex/StarMax 127 Maksutov-Cassegrain telescopes, Orion SkyView Pro 127 Maksutov-Cassegrain Telescope
7375 182mm/7.2" Orion SkyView Pro 6 and 6LT reflector telescopes, 150mm f/8.0 telescope optical tube assembly
7376 235mm/9.25" Orion SkyView Pro 8 Reflector Telescope, Orion Atlas 8 Reflector Telescope, 203mm f/4.9 telescope optical tube assembly
7377 298mm/11.7" Orion Atlas 10 Reflector Telescope, 254mm f/4.7 telescope optical tube assembly

Notes for Selecting Tube Rings:

Outer diameter (OD) of the telescope should match inner diameter (ID) of rings. If OD of the telescope is a little smaller than ID of the rings, that is OK; you can "shim" inside of rings with extra felt.

The column labeled "Rings Fit" can be used as a guide for selecting appropriate rings if you don't know the OD of the telescope.