The lens nearest whatever is under scrutiny provides an image, which can then be enlarged by the lens nearest the viewers eye by moving it closer or further away from the objective lens. Both eyes can see comfortably through both lenses with having to squint one eye to see.
Even though they are pre-moistened, they do not leave any trace of residue-causing streaks on the expensive lenses. First, determine just how and under what circumstances you will be using your new binoculars. For astronomy use you will need at least 40mm aperture and preferably larger.
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. You will need a magnification factor of at least 7, maybe up to 10 if you have a steady hand.
In order to define the quality performance of their products, binocular makers present the field of view in mathematical conversions that show a variance of fields. The first number separated by the "x" is the power of the binocular, and means the object being viewed appears to be that number of times closer than you would see without the binoculars. Always make sure that you buy from reputable sellers.
These tips hopefully will lend themselves to your benefit. Despite all of your preventive measures, there will come a time when your binoculars are damaged.
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