95% light transmission Fully multicoated lenses for unsurpassed light transmission/contrast Nikon's famous super-high resolution lenses One-piece main-body-tube construction 100% Waterproof/Fogproof/Shockproof 1/4-minute click reticle handturn adjustments Lifetime Full Warranty Quick Focus Eyepiece Actual Magnification: 1.5x-4.5x Objective Diameter: 20mm Exit Pupil (mm): 13.3-4.4 Eye Relief (in.): 3.7-3.5 FOV @ 50 yds (ft): 33.5-11.2 Tube Diameter: 1 in. Objective O.D. (mm/in.): 25.4/1 Eyepiece O.D. (mm/in.): 41/1.61 Length (in.): 9.7 Weight (oz.): 9.8