Binoculars by magnification: we give advice
Each pair of binoculars has an indication with two numbers. 8x42, for instance. The first number represents the magnification factor and the second number the objective diameter. 8x42 means that the binoculars have a magnification of 8x and that the objectives, the lenses at the front, have a diameter of 42 mm.
Binoculars & scopes