Product Review

This pair of cast-aluminum tube rings features an inside diameter of 298mm for use with Orion 10" reflector telescopes. The tube rings feature quick-release, hinged clamp knobs and felt lining. Designed for use with Orion Dovetail Mountign Plates and Orion telescope mounts, they fit many other brands of mounts as well. One of the two rings in each 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. Inside diameter (i.d.) is 298mm/11.7". One-year limited warranty.