Feature BAK7 Prism, Fully-multi Coated, Center Focus, 7 pcs 4 Groups Lenses. Rubber Covered to Protect against Crashes and Scratches IPX4 Rain Proof Lightweight Spotting Scope with Tripod For Bird Watching and Wildlife Viewing Specification Magnification: 20-60x Objective Lens Dia.: 70mm / 2.76in Scope Length (angle): 340mm / 13.39in Weight: 664g / 23.4oz Type of prism: BAK7 prism Number of lenses: 7 pcs 4 groups Appearance: Rubber covered Coating: Fully multi coated Folding Eyecups: Twist-up Field of View: 12.9-6.6ft @ 100yds Field of View: 4.3-2.2m @ 100m Field of View: 2.45-1.26Adeg Exit Pupil Dia.: 3.55-1.2mm Eye Relief: 17-13.5mm Resolution: 3.5" Min. Focal Length: 15ft/5m Waterproof: IPX4 Nitrogen filled: Yes Accessory: Soft bag, strap, tripod, manual and cleaning cloth. Video Service