This adapter is designed for focal plane shutter cameras.
On the Mamiya 645 bodies (Pro/TL/AFD/AFD II) you will not be using the leaf shutter in the Hasselblad C-Series lens, as you will use the focal plane shutter built into into the camera. With shutter cocked, the lens will stay open indefinitely.
Regards,
Jordan
How do you cock the shutter on a CF lens with that thing? The CF-HC adapter for H2 bodies has a huge big lever on the side to take care of this, but the image on the site you linked just shows a cylindrical converting ring...
-axel
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