SVBONY T2 T Ring Adapter and T Adapter 1.25'' Metal for All Canon EOS Standard EF Lenses and Telescope Microscope Camera Astrophotography Accessories Perfect for SLR DSLR cameras photography;connect camera to telescope for direct;prime focus; photography convenient and easily Super easy to use;thread t adapter into t ring adapter;then thread the whole mount adapter into Canon EOS cameras to connect to telescope Universal t adapter fits all standard 1.25" diameter telescope microscope etc;t ring adapter is compatible with all standard 1.25" lenses of Canon EOS cameras;but not for SV13 spotting scope High quality metal materials and tight;non binding fit;solid and durable for long term use Manual focusing;some short-focus camera or telescope's optical tube may not be able to focus quickly;so it's best for you use an additional extension tube