Swarovski Optik TLS APO 43mm Telephoto Lens System for ATX/STX Adapter – The right choice for anyone who appreciates top-quality digiscoping, the TLS APO 43 mm camera lens was developed as a complete system with the new ATX/STX spotting scopes. Its excellent optical quality makes it particularly attractive to the most discerning digiscopers who want to use full-frame cameras. The TLS APO 43 mm is supplied without the T2 adapter ring for Canon, Nikon and Sony cameras.