The Lecia APO Tele-Elmar-S 180mm f/3.5 is one of Leica's top performing weather- and dust-sealed lenses. It's unique telephoto characteristics and quick aperture makes the Leica APO Tele-Emar-S 180mm f/3.5 is a great investment for any photographer. The lens is comprised of nine elements in seven groups - six which are fabricated from glasses with anomalous partial dispersion and two possessing low dispersion - thus eliminating distortion, vignetting, and chromatic aberration ensuring striking results, at all apertures, throughout the entire image field. The Leica APO Tele-Elmar-S 180mm f/3.5 contains Leica's microprocessor for precise autofocus and iris diaphragm control.