I use the Novoflex EOS/NIK-NT to use my Nikon lenses on the BMCC EF. It's a bit on the expensive side but I've had some bad experiences with the Fotodiox adapters (both consumer and pro models).
http://www.bhphotovideo.com/c/product/7 ... r_for.html
The lenses I've used with it (all manual everything, of course):
Nikon 14-24mm f/2.8G
Nikon 24-70mm f/2.8G
Nikon 50mm f/1.8D
Nikon 85mm f/1.8D
Sigma 15mm f/2.8 EX DG Fisheye
I have yet to try my Nikon 70-200m f/2.8G but don't see any reason why there would be a problem…. I'm really curious about using it along with the 2x tc.