The Celestron UPCLOSE G2 Porro Binocular - 10x50 is a high quality but economically priced binocular, perfect for bird watching, sporting events, concerts, travelling and studying nature and wildlife. They have multi-coated optics which increase light transmission resulting in brighter and sharper images with high contrast levels. Their stylish rubber covered aluminum body protects from rough handling, and they have ergonomic thumb indents and finger ridges for extra non-slip comfort and ease of use. They are also water resistant. SPECIFICATIONS Aperture (mm): 50 mm (1.97 in) Magnification: 10 x Caps: Yes Carrying Case: Soft case included Weight (oz): 27 oz (765 g) Angular Field of View (deg): 6.8 Linear Field of View (@1000 yds): 354 ft (108 m) Linear Field of View (@1000 m): 118 m (387 ft) Exit Pupil (mm): 5.0 mm (0.2 in) Eye Relief (mm): 12 mm (0.47 in) Near Focus: 23 IPD Max: 72 mm (2.83 in) IPD Min: 56 mm (2.2 in) Prisms: BK-7 Optical Coatings: Multi-Coated Tripod Adaptable: Yes