CONTAX Carl Zeiss Distagon T 18mm F4 MMG. Ultra-Wide Angle from Japan C739. CONTAX Carl Zeiss Distagon T 18mm f/4 MMG. Length from lens mount (mm). Front Cover and Rear Caps. This lens has been tested in our store and is in good working order. Never Used, but it is opened. Displayed or Pre-owned product. […]