On offer is a Carl Zeiss Distagon 40mm for the Rolleiflex sl66 system in excellent condition. A must have lens for architectural photography offering a 89° angle of view with extremely well controlled distortion for a lens this wide. The lens comes with original front and rear caps and the front cap includes a handy depth of field calculation chart printed on the inner side, a thoughtful touch by the manufacturer. The lenses are clean and clear with only minimal age related internal dust that is inevitable with vintage lenses. The Aperture rotates smoothly with clicks at every stop. There is slight wear to the finish of the mount where it connects to the camera