Overview

The Carl Zeiss Distagon T* 4/18 ZM is a discontinued ultra-wide M-mount lens, noted for excellent build quality with all-metal construction and engraved markings. Optically, it shows good sharpness but suffers from significant vignetting and a green color cast on Sony sensors. It is relatively large and blocks the rangefinder, making it better suited for mirrorless adaptation. The lens suits photographers who need an 18mm M-mount option and can accept its size and optical compromises.