This cast-aluminum Orion Tube Ring 90mm ID set features quick-release, hinged clamp knobs and felt lining. Designed for use with Orion telescope 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.
Set of two rings includes mounting bolts and washers.
SKU: 07370
