We really loved the Metabones Speedbooster adapter, a device that transforms any aps-c sized sensor to a full frame lookalike and gives us one full additional stop of light. Here’s R.J.’s take on the Speedbooster with a version for Nikon cameras.
There is not electronic contact (no AF and no aperture control) but it costs $196.00 only. Metabones doens’t yet offer a Nikon to NEX adapter. And the Chinese company choose to fill exactly that spot.
Sold here: LINK