The Leica Summaron-M 28mm f/5.6 Lens is an extremely compact wide-angle lens that offers enormous depth of field and visible vignetting. Designed to deliver outstanding image quality, still retaining sharpness and clarity throughout the aperture range; and adopts its classic, screw-mount lens thats been constructed in 1955.Key features to the lens include a classic symmetrical lens construction that consists of six elements in four groups to achieve a distinctly analog appearance, providing natural contrast, fine rendition of details and sharpness, along with noticeable vignetting; a manual focus design that provides a minimum focusing distance of up to 1m; and it includes a lens hood thats machined from solid brass to match the classic lines of the lens, and to block out any stray light from destroying your image.