Image on top: The Metabones Speed Booster.
Metabones created an amazing adapter with the Speed Booster. And it’s also a very pricey tool. You pay $399 for a manual adapter and up to $599 for an electronic adapter. So if you are praying for for a cheaper alternative than your prayers will be listened by the Chinese company Mitakon. I have been informed that these guys are going to launch a much more affordable “speed booster” alike adapter in July. Price will be at least the half of the Metabones. Of course we have to see 1) if the quality of those adapters will be as good as the Metabones 2) and how the heck Mitakon will avoid to get into a patent dispute with Metabones.
back to the Metabones adapter. They are shipping at Metabones website. Those are the different versions:
ALPA to NEX (check Alpa lenses here on eBay).
Canon EF to NEX (check Alpa lenses here on eBay).
Contarex to NEX (check Contarex lenses here on eBay).
Contax C/Y to NEX (check Alpa lenses here on eBay).
Nikon F to NEX (check Alpa lenses here on eBay).
Leica R to NEX (check Leica R lenses here on eBay).
Reminder (SR = Sonyrumor):
SR1=probably fake rumor
SR2=rumor from unknown sources
SR3=50% chance it is correct
SR4=rumor from known sources
SR5=almost certainly correct!