Compact light weight Wide vision Built-in 1/4 "tripod slot Automatic anti-glare system Powerful infrared auxiliary ligh Key performance indicators Magnification ,x2 3 5Objective lens diameter,mm32 44 50 Lens system39mmF/1.2 59mmF/1.7 88mmF/1.7FOV at distance 200yards,ft/m302/92 197/60 118/36 Focus range,yards0.25 to infinity 1.0 to infinity 1.0 to infinityEye relief distance,mm 15Dioper setting,D ...