The LEICA APO-Summicron-SL 2,0/28mm ASPH. is the latest addition to the ever-expanding APO-Summicron-SL series, a lens range that is renowned for its top-level optical performance and extremely fast and reliable autofocus. The APO-Summicron-SL 2,0/28mm ASPH. is the first true wide-angle lens in this series. All APO-Summicron-SL lenses feature the exact same dimensions and, consequently, the same filter size. ts angle of view makes the APO-Summicron-SL 28 f/2 ASPH. especially suitable for reportage, interior and architectural photography. Its maximum aperture, which is large for this focal length, yet can be used without any loss of image quality, offers additional creative possibilities through the controlled application of sharpness and blur.