Chassis:30mm Mono-tube Optical System:8-32× Objective:56mm Reticle:SR Pro Illumination:Red / Green - 5 Levels Focus/Parallax:Side Focus - 9m / 10yds to Infinity Field of View: m @100m / ft @100yds3.5 - 1.1m / 10.6 - 3.3ft Eye relief:89mm / 3.5″ Length:432mm / 17″ Weight:870g / 30.7oz Waterproof, Shockproof, Nitrogen purged. All calibre