If you are looking to buy a pair of binoculars for the first time you will be faced with an overwhelming choice of makes and models. Binoculars come in all shapes and sizes, and range in price from from less than $20 to up thousands of dollars, so finding the right pair to fit your needs and budget is not always that straight forward.
The first part of the number tells us the magnification of the binoculars, for example, 8X magnifies an object eight times and 10X magnifies the subject ten times. When considering the magnification of a pair of binoculars you must also be aware that the higher the magnification the smaller the area you can see becomes. This is known as Field of View and is often noted as a number of feet per 1,000 yards.
The binoculars with Porro prisms tend to be heavier and bulkier, but because of their design tend to let in more light and produce sharper and brighter images. When you see a pair of binoculars that look more like straight tubes with no offsets, these are roof prism binoculars.
A binocular with roof prisms are a much newer design that makes for a more compact pair of binoculars. Roof prism models can still have fairly large lenses, but the physical weight and size of the binoculars are greatly reduced. However don't expect to see any giant binoculars that utilize roof prisms. The image you see in roof prism binoculars is not always as sharp or as bright as traditional Porro prism binoculars.
Something that can greatly affect the price of a pair of binoculars is special anti-reflective lens coatings. These special coatings are designed to cut down on glare and help ensure that as much light as possible is collected by the optics. While coated optics are desirable they can quickly make the price of your binoculars.
If you just want to observe birds at your back yard feeder, then a small birding binocular or spotting binoculars that are light and simple to use would be the best choice. If you plan to mount your binoculars on a tripod and use them for astronomy study, you should choose a larger Celestron binocular. If you plan to use your binoculars for camping, fishing, hunting, hiking, boating or any other outdoor activity, you should probably choose a weatherproof or waterproof binocular. Waterproof binoculars have a rubber coated body which keeps out moisture and protects the optics and internal parts from corrosion.
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