Helpful Tips for Buying Binoculars
Roof prism binoculars are streamlined and lighter than porro prism models. However, porro prism construction affords a clearer, crisper image.Some binocular models are waterproof, fog-proof, and shock-proof, and feature rugged construction and tough, no-slip rubber shells. These are great in less-than-ideal weather conditions."Field of view" refers to the amount of territory seen by looking through the lenses. It is determined by a combination of magnification and design of the lens and eyepiece. In general, more magnification means a smaller field of view, and an eyepiece with a wider angle will give you a greater field of view.Astronomy binoculars feature very large objective lenses, some even up to 100 millimeters, for maximum light allowance, and magnification powers of 10x to 30x.