The OSCAR7 20-60x82mm Spotting Scope is arguably one of the best performing spotting scopes you can buy at any price. This premium optic offers an industry leading HDX optical design that combines extra-low dispersion and high light transmittance glass along with a state of the art triplet apochromatic lens system to provide you with the maximum in color clarity and image brightness for unmatched resolution and image contrast across the entire viewing spectrum. HDX Advanced optical system comprising both High Definition (ED) and High Transmittance (HT) glass for ultra-high resolution, optical performance and light transmission. APO Triplet Apochromatic Lens, combined with HD Mfg: Sig Sauer, Inc.