Thomas Smet
Veteran
That won't work well on an MFT camera, because EF lenses require active electronic adapters to provide aperture control (as well as auto-focus and IS features). As IronFilm points out, if you want a speedbooster-compatible lens with straightforward manual lens control, Nikon-mount lenses are the most MFT-friendly option. This does NOT include the recent electromagnetic-iris "E-type" lenses from Nikon and Tamron, as discussed above. But most Nikon enthusiasts in the MFT ecosystem aren't looking to use the latest electronic models, we're into the vast range of classic MFT and speedbooster-compatible lenses.
Which is why I said EF requires an extra investment. You have to use expensive adapters. I was stating that Nikon can use a $20 adapter and therefore much cheaper. There are cheap adapters that control the Nikon aperture with a lever.
