The 25x100 Water Proof Cosmos Porro Binoculars feature extreme magnification and stunning Multi-Coated Bak-4 Prisms that allow you to enjoy vast distances whether it"s for astronomical or long distance terrestrial viewing. The super-large objective lens maximizes light transmission so you can see high contrast views in all types of light conditions. Long eye relief allows you to see through the eyepiece at a comfortable distance that is perfect even for those that wear eyeglasses. The eyepieces also individually adjust so your view is both accurate and comfortable. A braced in mounting post allows you to conveniently stabilize these binoculars on a tripod (tripod not included) so that your view stays locked-on target time after time. These spectacular binoculars are structurally reinforced by a heavy-duty textured aluminum body and also come with an included carrying case to help protect the binoculars while in transit. These binoculars make the ideal companion whether you’re stargazing, mapping the Universe or long distance nature observing. Specifications Magnification: 25x Objective Lens: 100mm Waterproof: Yes Fogproof: Yes Prism Type: Porro Prism Glass: BAK-4 Exit Pupil: 4mm Optical Coating: Multi Coated Focusing System: Individual Field of View (ft@1000yds/m@1000m): 156/52 Close Focus (ft/m): 55.8/17 Eye Relief: 15.4 mm Included Accessories: Braced in Tripod Mounting Post, Premium Hard Case, Lens Covers and Lens Cloth Warranty: Limited Lifetime