The Engage EDX is backed with the allweather assurance of Bushnells exclusive EXO Barrier lens coating it repels water debris oil and fog. The fully multicoated optics offer maximum brightness and clarity and theyre housed in a lightweight and rugged magnesium chassis. ED Prime Glass and a locking eyepiece diopter ensure razor sharp images every time. The PC3 phase coating brings to the resolution to the highest level and the dielectric prism coating keeps light transmission high. The result is the best viewing experience perfect for birding hunting or general observation. Adapts to Tripod.