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• 90mm ID Orion Telescope Tube Rings

  This cast-aluminum 90mm ID Orion Telescope Tube Ring set features quick-release, hinged clamp knobs and felt lining. Designed for use with Orion mounts, they fit some other brands of mounts as well. One of the two rings in the set has a 1/4"-20 piggyback camera adapter on it, the other has a threaded 1/4"-20 hole. The piggyback camera adapter can be removed for mounting an adapter plate for a guide scope on top of the tube rings. For use with Orion SkyView Pro or Atlas mounts, you will also need a dovetail mounting plate, #7383 (8" length) or #7385 (13" length). 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. Outer diameter (OD) of the telescope should match inner diameter (ID) of rings. If OD of the telescope is a little smaller thna ID of the rings, that is OK; you can "shim" inside of rings with extra felt. Vixen dovetail plates are compatible with the Orion SkyView Pro mount. Orion Product Number: 7370

  Tube Ring Reference Table
  Item #	Ring Inside Diameter (ID)	Rings Fit
  7369	76mm/3.0"	Observer 70 refractor
  7370	90mm/3.5"	AstroView/Explorer 90, ShortTube 80, 80mm f/11 OTA
  7371	100mm/3.9"	AstroView 100, SkyView Pro 100, 80mm ED, 100mm f/6 OTA
  7372	116mm/4.6"	StarMax, Apex 102, SpaceProbe 3, AstroView 120/120ST, 120mm f/5.0 and f/8.3 OTAs
  7373	140mm/5.5"	ShortTube 4.5, StarBlast
  7374	144mm	Apex/StarMax 127, SkyView Pro 127
  7375	182mm/7.2"	SkyView Pro 6, 6LT, 150mm f/8.0 OTA
  7376	235mm/9.25"	SkyView Pro 8, Atlas 8, 203mm f/4.9 OTA
  7377	298mm/11.7"	Atlas 10, 254mm f/4.7 OTA

   

• specifications

  Free Shipping	Yes
  Ring Size	5"
  Warranty	Orion Limited Warranty