The most versatile weapon scope available, the D-830 eliminates the need to purchase and maintain separate daytime and night vision weapon sights, spend zeroing time and ammunition, or carry separate weapons due to loss of zero settings when changing from day to night optics. This advanced, high-performance, 2.5-10 power rifle scope can be transformed from day to night operation without tools in a matter of seconds. The precision manufactured day and night eyepieces can be exchanged while the scope is still mounted with no change in zero. Large 56mm objective lens, ¼ MOA windage/elevation adjustments and a triplex Mil Dot ranging reticle ensure the clearest image in the lowest light of any night vision scope in the world.