Essentially, all binoculars and scopes are derived from classical telescopes, which consist, in their most basic fashion, of two lenses. Both eyes can see comfortably through both lenses with having to squint one eye to see.
Pack them and you'll be looking off into the distance bringing everything so much closer. Pay close attention to the numbers that are printed on the binoculars or quoted in the ad. The "10" refers to the magnification power of the binoculars, that is, objects viewed will appear to be 10 times closer than when they are viewed by the naked eye.
Any higher than about 10 times magnification and you will need to mount them on a tripod as the hand shake effect makes it difficult to get a sharp image. The image is also duller when the magnification is greater then ten. You can see so much detail in the craters, one which you can not see by plainly looking at the moon with the naked eye.
Thus, after years of wear and tear, a new cover gives your binocular lens a fresh fortification. Binoculars are a key piece of equipment outdoors.
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