This scope lens features a zero power base lens with a power button centered on the lens in either a 7mm or 10mm size. 
This center magnification principle allows a more natural centering of the target and eliminates the need to “peek” around a pin or dot. 
The design of this scope lens combines ZEISS supplied glass, and premium ZEISS multi-layer AR coating on a slightly curved surface to provide a sharp and clear target image.