I originally used a NN-SPH2L and upgraded about 1.5 yrs ago with the NN5L with RD16. It was large, robust and I figured versitile enough for any situation. Recently I purchased a Nikon D800 amd very much wanted to putting my classic and mint Nikon 8mm circular fisheye to work on a 360 pano. I was told recently that this combination: D800 with the Nikon 8mm Circular Fisheye were incompatible with my NN5L. I'm now left very unhappy? I have not even tied it since it is set for my D300 & Nikon 10.5mm set-up. Any ideas?