Feature Tactical Reticle 6 Groups 8 Lens Sliver Coat Prism All Fully Multi Coated Rubber Armed to Protect against Crashes and Scratches w/ Belt Strap Clip IP67 Waterproof Specification Magnification: 8x Objective Lens Dia.: 42mm / 1.65in Ocular Lens Dia.: 20mm / 0.79in Overall Length: 141mm / 5.55in Weight (net): 414 g /14.60 oz without lens caps Type of prism: BAK4 roof prism Number of lens: 6 groups 8 lens Lens Coating: Fully Multi Coated Field of view: 37.8ft @ 100yds Field of view: 12.6m @ 100m Field of view: 7.2Adeg Resolution: 5.6" Min. focal length: 2m Relative Brightness: 27.04 Twlight Index: 18.33 Eyecups: Twist up Focus type: Manual Diopter Adjustment: -3 to +3 Waterproof: IP67 Nitrogen filled, weather proof and water resistant. Accessory: Softbag, strap, lens caps, manual and lens cleaning cloth. Video Reticle Service