KIPON BAVEYES M645-S/E 0.7 adapter is designed for the Sony E mount camera, allowing Mamiya 645 mount lenses to be mounted onto Sony E mount camera bodies. The 0.7x optic adapter gets rid of crop factor, and increases the aperture.
With KIPON BAVEYES M645-S/E 0.7 adapter, although the lens will fit physically, automatic diaphragm, auto-focusing, and other functions will not work, only manual model will be available.