|Sightron SIII Long Range Scope has 10-50x60mm target dot reticle. All the scopes in this pistol consist of 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 is available on all SIIB SS models and SIII SS LR Series Riflescopes. The side focusing system will focus from 10-40 yards to infinity depending on the specific model. All target knobs with 1/8-inch adjustments are protected by a large, heavy windage and elevation caps.