The yukon nvmt spartan 4x50 night vision monocular offers a large 50mm objective lens and 4x magnification the yukon spartan 4x50 monocular is designed for night time observation and comes equipped with a powerful built in ir illuminator which increases the viewing distance and enables observation in lowlight conditions and even complete darkness the ergonomic button layout combined with its soft durable rubber coating ensures ease of use and a reliable grip as well as providing additional p