SIII SS 832X56LRTD / TDT Riflescope Features: – All scopes in the SIII series feature a 30mm one-piece Main-Tube made from high quality Aircraft aluminum. Tube thickness is more than twice as thick as one inch models to provide maximum rigidity. All models are fog proof, shockproof and waterproof.- Side Parallax Focus: Designed for ease of use in prone and bench shooting the side focus will focus from 10-40 yards to infinity depending on the specific model. – All Sightron SIII LR Series Riflescopes feature ZACT-7 seven layer multi-coating with precision ground glass. These lenses provide superior light transmission and resolution for the ultimate in performance.- European style fast focus eyeball accompanies all SIII SS Long Range Models. A quick turn of the eyeball allows the user to focus in a matter of seconds. Tweaking the eye focus is just a small adjustment away. – This scope features Sightron ‘s unique ExacTrack windage and elevation adjustment system. No other system on the market comes close to the precision and performance of ExacTrack. Specifications: –