Jhorzy asked:

I don't want to spend a lot of money, preferable $75 or less for a second pair to keep in my truck just in case I need them. I think I want 8x optical but the second number (i.e. 32, 42, 50, etc) what does it do for you? I want something clear and good for low light situations, so do I want a higher or lower second number? Also I was considering the Bushnell 10x42 Permafocus. . . does anyone have any other recommendations? Thanks

Reply:

BINOCULAR MAGNIFICATION (POWER)
Binoculars are often referred to by two numbers separated with an "x". For example; 8x32. The first number is the power or magnification of the binocular. With an 8x32 binocular, the object being viewed appears to be eight times closer than you would see it with the unaided eye. We do NOT recommend to use binoculars with magnification over 10x without a tripod - if you go with too much magnification in a hand-held binocular, your image will be very shaky! Also, many people ask - How far can you see with a binocular? - we always answer - You can see as far your eyes can see, pharmacy online but the objects will seem to be closer - magnified by the power of your binoculars. Please see this page for some sample digital pictures taken through giant Oberwerk binoculars with 25x and 40x magnification.
OBJECTIVE LENS SIZE (APERTURE)
The second number in the formula (8x32) is the diameter of the objective or front lens. The larger the objective lens, the more light that enters the binocular, and the brighter the image.

Source(s):

http://www.opticsplanet.net/how-to-understand-binoculars.html

 

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