Bial Dual Focus 16x52/16x40 Monocular Telescopes for Birds/hunting/camping/hiking Armoring (16x40 Mini) Mulit-coated optics upgraded version of the green AR The fully coated optics, meanwhile, guarantee superior light transmission and brightness, helping you see just about any target Powerful, ultra-compact and ultra-lightweight Multicoated optics guarantee superior light transmission and brightness