BARSKA Mil-Dot Airgun (Black Matte, 4x32 AO) Hunting scopes rifles Versatile top of the line. Eye relief: 3.3 inches, Exit pupil: 13.3 - 3.6mm Field of view: (feet at 1000 yards/ meters at 1000 meters)29/ 9.3 at 4x, Click value: 1/4 inches Adjustment knob: Objective parallax adjustment, side adjustment windage and elevation