Tube Rings, 140mm ID

• Set of two cast-aluminum rings with quick-release, hinged clamp knobs and felt lining
• One ring has 1/4"-20 piggyback camera adapter; the other has threaded 1/4"-20 hole
• Sold in sets of two rings. Mounting bolts and washers are included
• Use with Orion EQ-1, EQ-2, EQ-3, or AZ-3 mounts
• Inside diameter is 140mm

This cast-aluminum 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 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. One-year limited warranty.