Metabones Speed Booster 0.71x Ultra N/F - MFT to use Nikon F mount lenses on Micro Four Thirds cameras, Olympus and Lumix.

Reduces the focal length by a factor of 0.71 and increases the maximum aperture by a stop. It allows for infinity focus adjusting.

Nikon F to M43, Micro Four Thirds.
Olympus, Lumix, OM System