Tele Vue Standard T-Ring Adapter - TRG-1072.

Standard T-Ring adapter mates a T-Ring to the Tele Vue Imaging System telescopes and accessories. Optional T-Ring is required.

Please note, if your are using a Canon EOS camera, Tele Vue recommends the  as it has a larger diameter opening for minimized vignetting. Tele Vue Product Number: TRG-1072