On most of standard size binoculars models, there will be a thumb lever or wheel placed conveniently within reach so you can adjust the magnification without changing your grip or taking the eyepieces away from your eyes.
Outdoor enthusiasts know that durability, size, weight and optical performance are necessities when in the field.Sightron has added 2 models to the popular SII Blue Sky line of binoculars. The additio..