US Patent 7886448 Archery range finders and lenses

Archery range finders and lenses for archery range finders, the archery range finders being intended to be mounted on an archery bow. The archery range finders allow for the archer to place the lens on the target and obtain an immediate reading of the distance that the target is from the shooter and enables the shooter to place the proper distance pin on the target without having to do any mechanical adjustments and without having to guess the distance of the target from the shooter.