Finally, an adapter for manual lenses that adds autofocus.
FotodioX has just released a brand new adapter for the Fujifilm X Series of cameras that adds autofocus to your vintage manual focus lenses. While the adapter itself is for Leica M-mount, you can adapt many different lenses to M-mount and still use the adapter. Anything from Nikon F mount to M42 screw mount lenses can all be used with this adapter. Sadly, due to weight, Canon FD and EOS mount lenses will not work.
FotodioX released an adapter with similar functionality a few years back for Sony E-mount and the reviews are mostly positive, but there are some caveats. The adapter works by physically moving the lens back and forth to change focus, allowing you to focus extremely closely, possibly even closer than the lens would allow you to naturally. However, because of the small motor, the adapter can only support lenses up to 1.5 lbs, and longer lenses may need a little bit of manual focus work, especially when focusing close up, before the adapter takes over. It also seems to work best on lenses that are 50mm and above. Overall, it seems like a great piece of gear to add to one's kit if you have a collection of old glass laying around.
Are you planning on picking up this adapter? At $350, it isn't cheap, but if you're a fan of vintage glass, it looks like a must-have for Fuji shooters. One thing I would like to see is one of these adapters with a focal reducer built in, but that sounds far easier said than done.