The lens diameter considerably influences the optical capabilities of a telescopic sight. With increasing magnification, the brightness of the sene diminishes. This factor plays a key role in the military, in particular, where long ranges are common. Under adverse weather conditions such as precipitation, twilight and haze, high magnification often leads to unwanted results. This Hensoldt ZF 6-24x56 riflescope with an illuminated mil dot reticle in the second focal plane features a 30mm tube, matte black finish, .05 MRAD click adjustment, and parallax adjustment. Hensoldt ZF 6-24x56 Mildot Riflescope 10139126