The 20x80 "Economizer" has excellent color correction and edge-of-field sharpness due to it's relatively long focal length. Offers extraordinary astronomical viewing, and is also a great choice for long-range terrestrial observation- especially when viewing under low light conditions. The giant 80mm objectives gather a great deal of light (30% more than 70mm objectives), yet contrast is excellent. Includes the finest BAK4 prisms and is fully broadband multi-coated. It has a long 18mm eye relief (unusual for such a high-magnification binocular), so can be used by those that wear glasses. Light-weight rubber-armored 15" long body. Also includes right ocular diaper adjustment, soft rubber ocular and objective covers, and a carrying case. Now available for a fraction of the price of other comparable brands.