Extremely Sharp Images. The Zeiss ZM 28mm f/2.8 Biogon for Leica offers very low distortion and extremely sharp image quality across the frame. It has a 1.8-foot minimum focusing distance, and its ten-blade curved aperture makes for smooth out-of-focus highlights. Its flare control and lack of geometric distortion provide useful accuracy, making it perfect for cityscapes, landscapes, and architectural and street photography

High-Quality Construction. An all-metal lens housing gives the ZM 28mm f/2.8 Biogon a premium feel. Its manual focus ring offers precision focus adjustment and excellent speed, and its metal aperture ring offers ⅓-stop aperture intervals.