The Sightron 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 fogproof, shockproof and waterproof. Featured with all SIII Series Riflescopes.
Allows for quick and easy adjustments when in the field. Diopter adjustment ranges from -2.0 to +1.0 settings. Side Parallax focus is available on all SIIB SS models and SIII SS LR Series Riflescopes. 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.