The defining feature of this Shepherd scope is its patented Dual Reticle System. One reticle on the scope’s first focal plane consists of a series of progressively smaller rings that serve both as stadia-type range finders and as progressive aiming points out to 1,000 yards. Another reticle on the second focal plane consists of three legs of a dual-thickness crosshair. Each reticle has its own set of windage and elevation adjustments, which, believe it or not, allow a firearm to be zeroed-in by firing just one shot. The system is ingenious and not nearly as complicated as it sounds. Some panelists liked this range-finding feature, while others thought it was too confusing. Apart from its controversial reticles, this is a very nice scope, both optically and mechanically. Outdoor Life Gear Test 2001