Portable night vision monocular head mounted Versatile,long distance Lightweight,high resolution built-in IR illuminator When night falls, you never know what ... the cover of darkness may be hiding;With the Nightfall Night Vision Monocular you can see in the dark and stay hidden ... 7Objective lens diameter,mm24Field of view,deg30Focus range,m 1. to infinity Exit pupil diameter,mm6 Eyepiece Dioper ...