Nikon MONARCH 3 BDC Riflescope, Black, 4-16x50 Featuring MONARCH 3 Eye Box Technology with 4-time zoom range and up to four Inch of eye relief Adjustments are made easy with Spring-Loaded Instant Zero-Reset Turrets A quick focus eyepiece allows the shooter to instantly bring the reticle into focus Ultra ClearCoat Optical System for up to 95% light transmission Optimized for use with Nikon's Spot On Ballistic Match Technology