The Leupold VX-3L 6.5-20x56mm Side Focus Target Scope features DiamondCoat 2, an ion-assist lens coating, for higher light transmission and the greatest level of abrasion resistance we've ever offered. DiamondCoat 2 offers unsurpassed durability and will prove its worth in the wildest places on earth. DiamondCoat 2 has the additional advantage of assisting the Leupold VX-3L 6.5-20x56mm Riflescope in light transmission, for greater brightness, clarity and contrast. Leupold VX-3L 6.5-20x56 Riflescope w/ Target Dot Reticle, while at the same time, it minimizes the reflections of the sky on the outer eyepiece on this Scope from Leupold. With outstanding accuracy, legendary ruggedness, and absolute waterproof integrity, Leupold VX-3L 6.5-20x56 BAS Riflescopes include an extreme fast-focus eyepiece ensures a generous eyebox, superior field of view and optimal diopter adjustment in the field. It allows the user to adjust through the full range of diopter adjustment in one complete turn of the eyepiece.