Swarovski Optik TLS 800 35mm Camera Adapter for ATS/STS 800mm High-grade telephoto lens system for Swarovski spotting scopes Performs as photographic lens and telescopic eyepiece all in one Creates photography system with high-powered 800mm focal length 8 total lenses within system; more affordable than most ultra-telephoto lenses Compatible with all classic and digital single-lens reflex cameras