Nikon PROSTAFF 5 BDC Riflescope, Black, 2.5-10x40 Features Nikon's patented BDC reticle with see-through ballistic circles for superior long-range shooting Adjustments are made easy with Spring-Loaded Instant Zero-Reset Turrets Made with Nikon's fully multicoated optics for maximum brightness and light transmission A quick focus eyepiece allows the shooter to instantly bring the reticle into focus Optimized for use with Nikon's Spot On Ballistic Match Technology