The Sightron SII36X42BRD features 36X magnification with an objective diameter of 42mm and tube diameter of 1 inch. This long distance scope feature Sightronâ??s unique ExacTrack windage and elevation adjustment system for enhanced precision. The target-style turret has audible click adjustments in 1/8 MOA at 100 yards. Includes a 720 degree adjustable objective. This scope features fully multi-coated lenses with coatings on both surfaces of glass to provide maximum optical quality and light transmission. This scope is waterproof, shockproof, and nitrogen gas charged.