BUSHNELL PowerView 16x32 Binocular

12x power magnification50 mm diameter objective lensInsta-focus lever for rapid focusingFold-down rubber eyecupsFully-coated optics for increased brightnessCan be adapted to a tripodWeighs only 27 ouncesPorro prism systemWide-angle field of viewIncludes case, neck strap and lens clothWhat do the numbers mean?Binoculars are referred to by 2 numbers separated by an "x". The first number is the power (magnification). For example, on this 12 x 50 binocular, the object being viewed appears to be 12 times closer. The 2nd number is the diameter (in millimeters) of the objective (front) lens. The larger the objective lens, the more light that enters the binocular, making the image appear clearer and brighter.What's the difference between a porro prism and a roof prism?In porro-prism binoculars, the front lens is offset from the eyepiece, giving you a greater sense of depth and a wider field of view. In roof prism binoculars, the front lenses are in line with the eyepieces; this allows the binocular to have a smaller,