Hasselblad's fastest lens — the Zeiss Planar F 110mm f/2, a shutterless portrait tele for focal-plane V bodies.
The Carl Zeiss Planar F 110mm f/2 is the fast short telephoto made for the focal-plane-shutter Hasselblad V bodies, the 2000- and 200-series cameras. F lenses carry no built-in leaf shutter and rely on the body's focal-plane shutter, which allowed this Planar to reach f/2, the fastest aperture in the entire V-system lens line.
This is a manual-focus Hasselblad V lens without a leaf shutter, intended for the focal-plane-shutter bodies that can use it. Its maximum aperture of f/2 is unusually bright for medium format and it covers the 6x6 frame as a Planar. Because there is no leaf shutter, flash sync is tied to the body's focal-plane sync speed, and the lens depends on a working 2000- or 200-series body to fire.
The f/2 aperture gives a bright finder, low-light capability and shallow depth of field on the large 6x6 frame, so the 110mm became a signature portrait lens for the focal-plane bodies. Wide open it isolates a subject against soft backgrounds with a distinctive medium-format look, and the short-telephoto length gives a flattering perspective, which is why it is sought after despite its dependence on the less common shutterless cameras.
The F 110mm is desirable and holds strong used values, especially clean examples. Confirm it is the F type suited to your focal-plane body, check the glass for haze, fungus and separation, and inspect the large front element for cleaning marks. Verify the aperture blades are dry and the focus is smooth, and test it on a working 2000- or 200-series body, since without a leaf shutter it cannot be checked in isolation.