What is Magnification (Power)?
A. Magnification is the degree to which the object being viewed is enlarged. For example, with a 7×42, the number 7 represents the “power”. A power 7 magnifies an image to seven times the size it would be when viewed by the normal, unaided human eye. The level of power affects the brightness of an image, so the lower the power, the brighter the image it delivers will be. In general, increasing power will reduce both field of view and eye relief, which are also discussed here.
