T-Ring for Canon EOS SLR/DSLR Cameras (EF / EF-S Mount) - TelescopeAdapters
T2 Ring - Nikon — Explore Scientific
Amazon.com : SVBONY Telescope Photo Adapter, T Adapter and T2 T Ring Adapter 1.25 inch Telescope Accessory Compatible for Nikon Camera and Telescope : Electronics
Amazon.com : Lightdow T/T2 Mount Lens Adapter Ring for Canon EOS Rebel T3 T3i T4i T5 T5i T6 T6i T6s T7 T7i SL1 SL2 6D 7D 7D 60D 70D 77D 80D 5D
Canon EOS T2 ring: Buy online | Primalucelab.com
Amazon.com : Solomark T T2 Ring for Canon EOS Camera Lens Adapter with 1.25inch Telescope Mount Adapter : Electronics
JINTU T Mount T2 T-Lens Adapter Ring Telephoto Lens Adapter Compatible – jintuphoto
KIPON T-Ring Adapter for Leica M T2-L/M B&H Photo Video