The regent-hd binoculars have been developed with a high-definition optical system that provides an advantage in brightness and sharpness of the image, while also enhancing the light transmission in less favorable conditions.They features bak-4 roof prisms; multi-coated lenses; wide angle; tripod adaptable; large eyepieces and long eye relief.Magnification: 10x42 W.A.Field Of View: 305.10 ft @ 1000 ydsExit Pupil Diameter: 4mmPrism Type: BaK-4 RoofWeight: 24.60 ozFocus Type: CenterOptic Coating: Multi-CoatedProofs: Waterproof