Gosky Giant 25×70 Astronomy Binoculars provide high-resolution images with fully multi-coated optics. This minimizes the loss of light due to reflection, thereby ensuring a more natural, clearer view. With great optics as well as wide views, these binoculars are the perfect choices to have during outdoor activities such as hiking, viewing wildlife, bird-watching or sport events. Features and Benefits: BAK4 Prism Optics: BAK-4 roof prisms and fully multi-coated optics guarantee higher brightness and crisp, clear images. Large 70mm Objective Lens: Large 70 mm objective lens offer maximum image brightness in low-light conditions, gobble up light for spectacular views of the Moon, planets, star clusters. Rubber Armor Protection: Equipped with a durable and rugged armor to withstand the toughest weather conditions. 15x Magnification: The 15x magnification is great for both astronomical and terrestrial viewing, brings the distant beautiful dnature close to you. Sturdy Tripod Adapter: Sturdy tripod adapter can be mounted on a tripod for steady, hands-free viewing. Quick & Easy Focusing: The large center focus for easy and quick focusing. The soft, rubber foldable eyecups are comfortable to use with or without eyeglasses. Super Easy to Use: First use the center adjustment to get it focused correctly for the left eye. Then close your left eye and look only through your right eye and adjust the right eyepiece until it comes into focus. Now you are able to see clearly with both eyes! Specifications Magnification: 15x Objective Lens: 70mm Prism type: Porro Prism Glass: BAK-4 Exit Pupil: 4mm Optical Coating: Multi Coated Focusing System: Centre Field of View: 77m@1000m Close Focus (ft/m): 72/22 Eye Relief: 18 mm Weight: 56 oz