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The Pronto from Fotodiox Pro is a smart adapter that moves the manual focus lens back and forth to nail focus. Currently, it’s available for Sony and Fujifilm mount and it adapts Leica vintage lenses (and probably Pentax lenses) and while the focusing speed isn’t as fast as native lenses, it does the job just as good.
Below are images of the Pronto as well as a video showing it in use:
The adapter is currently available for $350 and you can preorder it on the Fotodiox website.
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