Hunting Binoculars, Digital Camera & Bird Binoculars, Zoom Compact Binoculars |
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Hunting Binoculars, Digital Camera & Bird Binoculars, Zoom Compact Binoculars
Hunting Binoculars, Digital Camera & Bird Binoculars, Zoom Compact Binoculars |
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Binoculars, Spotting ScopesUnderstanding the Features of a Binocular Prisms. There are generally two categories of prisms, porro prisms and roof prisms. Porro and roof prism binoculars are distinguished by their shape. Porro prism binoculars tend to be larger and have a definite offset to their body design. Roof prism binoculars are more straight and streamlined. Each provide excellent viewing. Field of View. Describes the size of the area that can be seen through the binocular or spotting scope. Expressed as the number of feet per 1000 yards of distance, the higher the magnification the narrower the field of view. On wide angle binoculars (designated WA on Alpen binoculars) a special lens design allows a wider field of view than normal. An example field of view for a standard 7X binocular would be 372 feet, whereas a wide angle would be 487 feet. Wider field of views are often preferred by hunters who want to scan large areas for game or for viewing sporting events. Coated Optics. Quality optics are coated to prevent glass surfaces from reflecting light and loosing it. The very best optics are "Fully Multi-Coated" which means multiple coatings are layered fully onto all glass surfaces. "Fully coated" means all "air to glass" surfaces have been coated with at least one layer of coating. "Coated" means some surfaces have been coated. |
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