The overall aim is to prepare you for the task of finding the right pair of binoculars, at the right price, without compromising on features that you may require. You'll need to choose the magnification power of your binoculars.
A typical bird watcher will tell you that an important feature to look for in binoculars is how tough they are. You position your telescope to look at the Moon, you see craters, and find that soon as you go to call someone to take a look, they take a look and it is gone. You must ensure that your binoculars have a good quality coating on the lenses.
If you will be staying in one spot for a period of time then it might be to your advantage to consider mounting the binoculars on a tripod which would free up both hands and not require you to find the viewing area, refocus, and keep steady each time you pick them up. So if you have a pair of binoculars with 8x magnification, they should have an objective diameter of 40.
Binoculars with larger fields of view may work better, but the cost is considerably more. Generally, a binocular lens cloth has a useable side and sometimes each side has different functions. So unlike ordinary day light binoculars the range for night ones is not that extended.
The greater the magnification, the narrower the field-of-view. Get a good pair and enjoy!
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