The yukon patrol 4x50 is an entry level night vision monocular equipped with a 50mm objective lens and 4x magnification the design is simple to use and comfortable to hold with raised latching switches and lever for eyepiece focusdioptre adjustment make locating the controls quick and easy even wearing gloves all models in the yukon patrol range are compact and durable with a soft touch sure grip abs plastic and rubber armoured bodyshell with focusing objective and ocular lenses the built