SVBONY T-ring Camera Lens Adapter Aluminum for Canon EOS DSLR/SLR Photography Sleeve M42 Thread for Landscape Lens Telescope Spotting Scope Designed for SLR DSLR camera digiscoping;connect camera to spotting scope for photography convenient and easily Universal photography sleeve with M42 threads on both ends fits all 42mm diameter eyepiece;so please measure your eyepiece to make sure it will fit your particular spotting scope for it is a well made unit; T-ring adapter only for Canon EOS camera High quality aluminum materials;full metal texture;durable and sturdy;solid and light wight;convenient to carry and one time for long term use Super easy to use;thread photography sleeve into T-ring adapter;then thread the whole mount adapter into Canon EOS camera to connect to spotting scope Lifetime warranty;we confidently promise lifetime warranty for each one from us