Armasight IR850W (long-range infrared illuminator) provides greater image intensified viewing capabilities for operations in little to no ambient light. Infrared illuminator is used in areas where the level of natural light is not sufficient. An IR850W illuminator provides near-infrared light which, although invisible to the naked eye, can greatly enhance the performance of night vision devices. The illuminator features adjustments for field of view divergence and output power. Armasight long-range IR850W illuminator significantly extends capabilities of Gen 2, Gen 3, and Digital night vision weapon sights and observation devices. IR850W provide wide-range beam angle adjustment from 2-30 degrees, which drastically improves the performance of the IR illuminator and extends the users nighttime visibility range.