come up to these expectations. A wide range of accessories ensures optimum conditions for all shooters even with strong visual defects and under extreme light conditions at the range. The glasses can be used for rifle and pistol shooting and shooting with open sight. Only change the lens frame - this can be done quickly and easily without any tools.Laser scaling on frame, lens frame and nose piece facilitate adjustments remarkably. The square-headed guide of frame and bows prevent the lens frame from unintentional movement or adjustment while shooting.