Most people, who think about buying a telescope, either go to a local department store or toy store and buy any telescope they have for sale. Binoculars come in different sizes and shapes to suit different purposes.
You buy the telescope and go home, put it up and go to look at the Moon. If you are planning on using your binoculars for birdwatching you want to look for a pair that is designed with good image quality. For astronomy use you will need at least 40mm aperture and preferably larger.
There telescopes may be priced higher then a toy telescope, however, a good telescope will last you a long time, and in fact it can last a lifetime with good care. They suck dirt off the lens surfaces leaving them crystal clear. You can buy bird watching binoculars for as much as a thousand dollars.
Field-of-view is determined by magnification and the focal lengths of the objective and eyepiece lenses. While compact binoculars weigh as little as a pound, by using them you will undoubtedly sacrifice performance. One fascinating use of binoculars is looking at the night sky.
The amount of light available while using your binoculars will determine more than any other consideration which binoculars are best for you. There is no such thing as one-size-fits-all when it comes to sporting optics.
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