Ultimate anti-reflective coatings on all air-to-glass surfaces; The L-Tec+ Zero System is easy to use with all captive parts and only one set screw; Optimized with select glass elements to deliver exceptional resolution, cut chromatic aberration and provide outstanding color fidelity; Infinite zero setting positions allow zero to be set between clicks for optimal accuracy; Provides quick visual and tactile reference of elevation turret's rotational position; Optimize image sharpness and brightness from edge to edge; Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt; Highly durable hard-coat anodization provides a low-glare matte surface and helps camouflage the shooter's position