You can now mount Nikon G lenses, and gain a stop of light
Micro Four Thirds and Sony NEX shooters have just scored themselves yet another Speed Booster from the folks at Metabones, this time allowing you to mount Nikon G lenses on your ILC camera.
Available for both Micro Four Thirds and Sony E mounts for $429, the newest Speed Booster will let you add Nikon G and F lenses, both AI and non-AI, to the front of the adapter. As with other versions of the Speed Booster, the adapter widens the lens's field of view by .71x, and adds 1 stop to the maximum F-number. However, since Nikon G lenses don't have mechanical aperture controls, the Speed Booster now comes with it's own aperture ring, allowing you to adjust the f-stop that way.
You're still stuck with almost entirely manual controls, but for people who have transitioned to shooting a mirrorless camera, and still have a lot of Nikon glass floating around, this could be an excellent way to keep using what you have, and shave off a stop of light while you're at it.