do I need two adapters to mount Nikon manual lenses to the GH1?

[Nicholas Natteau]

I already have the Novoflex MFT/NIK adapter.

But do I need a second Nikon adapter to mount a Nikon 50mm f/1.2 or f/1.4 lens to the GH1.

Because I am so far unable to mount the f/1.2 Nikon lens to the GH1 using Novoflex MFT/NIK adapter.

Is the back of the Nikon 50mm f/1.4 lens different to the back of the Nikon 50mm f/1.2?

Thanks very much in advance,

- Nick