The Leupold Gold Ring 12-40x60mm HD Spotting Scope employs an Extra Low Dispersion Optical System to maximize color fidelity and contrast. This produces and incredible image across a wide field of view, all with best in class eye relief for easy, full field viewing with or without eyeglasses. The prism-less Folded Light Path (FLP) system uses mirrors to compress a long optical system into half its length. All this performance, in a lightweight magnesium housing for the most packable optical power available.