In reply to jim robertson:
Jim No problem with image quality, I use it on Nikon 20mm 1.8, 85mm 1.8 and 70-200mm f4, not had a problem with auto focus which i have heard is an issue with slow autofocus on some lenses but not something I've experienced. The only problem is forgetting to pack it, this morning I carried my 70-200mm lens up a mountain but the FTZ adaptor was on another lens back home (I have the 14-30mm Z lens so the FTZ doesn't live on the camera body) if you have a few lenses and your going to keep them for a while I would possibly consider two FTZ adapters.