A pair of binoculars can be seen as two such telescopes, side by side, which together produce an image which has the depth of field that we are used to, rather than just a large flat image. Here, since they are, in effect, half the size of a regular pair of field glasses, better quality optics can be afforded, as the cost will be proportionally lower.
Even the finest of binoculars in the world turn out to be useless if you can't take them with you wherever you go. Binoculars are just more comfortable to look through and hold steady because both hands are usually used. The magnification factor tells you how many times larger the object will be magnified, a number of between 4 and 7 is ample for most applications.
If you are using binoculars with a large, heavy objective lens it is helpful, if not necessary, to stabilize them by either resting them on something or mounting them on a tripod. Such lens cloths take even fingerprints and stains of all sorts off your binocular lens.
More magnification always means less field-of-view. Roof prism binoculars are so much easier to water and fog proof because of internal focusing. When deciding to buy a telescope, ask yourself, how much room you have to house to telescope and what things do you want to look at with your telescope, deep space, local or both?
If you are going to be a birder, you are going to need binoculars. So, get out there.
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