Binoculars are actually two telescopes placed side by side so a viewer can see through them with both eyes. The optics field is quite large and the number of products is considerable.
I originally purchased the Monarch 10x50's for bird-watching and long range mountain scanning in Arizona, however, I found the extra sharpness of the 8X resolution meant that I didn't need the larger 10X magnification, because they had such excellent detail. Many night vision binoculars work similar to digital cameras, they have a built in flash. For most uses, look for a objective diameter that is five times the magnification power.
Such lens cloths take even fingerprints and stains of all sorts off your binocular lens. Numbers are used to describe the telescopic strength of the binoculars. The size of the binocular will probably affect the way they feel in your hands.
Many of the binoculars come with a carry case that can attach to a belt. Telescopes from department stores are ones which try to sell themselves on magnification. You can easily calculate it by dividing the aperture by the magnification so that 7 x 50 binocular has an exit pupil of just over 7mm.
Even if you aren't planning on taking your new binoculars on the water, consider spending a few extra dollars on a pair that has waterproof housing. Your willingness to increase your budget will often provide you with a return in performance of your purchase.
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