Chinese lens manufacturer Kipon has announced that next year it will make available a reducing adapter thats designed to allow medium format lenses to fit on full frame cameras. The adapter will have a magnification factor of 0.7x which it says will both widen the effective focal length of the lens in use and widen its effective aperture.
The first adapter will be designed to mount Hasselblad lenses on Sony E-mount cameras, but the company says it is working on other mounts for a... more (link is external)