Hasselblad's widest V-system optic — the Zeiss F-Distagon C 30mm f/3.5 full-frame 6x6 fisheye.
The Carl Zeiss F-Distagon C 30mm f/3.5 is a full-frame fisheye designed by Carl Zeiss for the Hasselblad V system, the 6x6 medium-format bodies built around the leaf-shutter lens line. As a C-series lens it carries the earlier styling with the coupled shutter and the classic chrome-and-black barrel, sitting at the widest end of the V-system focal range and giving the widest angle of view offered for the format.
This is a manual-focus lens for the Hasselblad V bayonet with a built-in leaf shutter, so exposure is controlled through the lens rather than a body focal-plane shutter. It has a maximum aperture of f/3.5 and covers the 6x6 frame with the strongly curved projection characteristic of a fisheye. Because rear filtration and the deep front element make conventional screw-in filters impractical, the design typically incorporated a set of built-in filters selected on the barrel.
A fisheye of this type renders straight lines away from the frame centre as curves and captures a very broad field, which suits dramatic interiors, architecture from tight spaces and expansive landscape work. Photographers used it both for the pronounced curvilinear effect and, with careful framing along the central axis, for keeping key horizontal lines closer to straight. It is a specialist optic rather than a general-purpose wide angle.
On the used market the C 30mm is one of the scarcer and more sought-after V-system lenses, so it commands a premium. Check the leaf shutter fires and steps cleanly at all speeds, look for haze or fungus on internal surfaces, and confirm the built-in filter turret rotates and seats correctly. Inspect the exposed front element for cleaning marks, and verify the aperture blades are dry and free of oil.