Bushnell’s Prime binoculars provide rich features with fully multi-coated optics, 10x magnification with 42mm objective lens diameter, BAK4 prisms that increase brightness and an EXO barrier lens-coating that shakes off water, dust and debris. IPX7-rated waterproof design. Field of view@1,000 yards: 305 yards. Eye relief: 19mm. Exit pupil: 4mm.