Magnifying life does, indeed, include sea life. And these are just the binoculars to do it. The legendary 7x50mm Marine binoculars are a premier choice for spotting marinas, deadheads, or the fisherman's best friend, feeding birds. Built to withstand the conditions that come along with the nautical world, they are not only nitrogen-purged to provide reliable waterproof/fogproof performance - the 13-7501 model is even hermetically sealed to further assure no moisture creeps in. Impressive light transmission from BaK-4 porro prisms, multi-coated optics and large UV-coated objective lenses brighten images from dusk-to-dawn. And, this model not only floats, but easy-grip rubber armoring protects and provides a secure hold should things get rough. Always nice, should an unexpected swell or throttle burst take you by surprise.
Specifications for this Bushnell binocular include:
- Magnification: 7x
- Objective lens: 50mm
- Field of view at 1,000 yards: 380 feet
Objective Lens: The diameter of the objective or front lens. The larger the objective lens, the more light that enters the binocular, and the brighter the image.
Field of View (F.O.V.): The side-to-side measurement of the circular viewing field or subject area. It is defined by the width in feet or meters of the area visible at 1000 yards or meters. A wide angle binocular features a wide field of view and is better for following action. Generally, the higher the magnification, the narrower the field of view.
Porro Prism System: In porro prism binoculars the objective or front lens is offset from the eyepiece. Porro prism binoculars provide greater depth perception and generally offer a wider field of view.