Swarovski TLS APO 23mm Telephoto Lens System Apochromat (for ATX/STX)The Swarovski TLS APO 23 mm Telephoto Lens System Apochromat is an easy to use adapter that expands digiscoping options for DLSR, Micro 4 3s, and other mirrorless compact cameras. The TLS APO 23 mm works well on the X Series spotting scopes as well as the earlier ATS STX Swarovski Optik spotting Scopes. Its lightweight design makes it easy for the user to rapidly switch between observing and shooting photos. The larger aperture allows shorter exposure