I have not done LF with the D800 specifically, but have in the past with other DSLR's (Canon IDs2) and even the Phase DF. Your biggest issue if accurate focus, and with the small pixels of the D800 you will most certainly need to use LV @ 100% with a loupe to get the best results. The second thing is being able to perfectly center/zero the assembly -- again the small sensor and diminutive pixels work significantly against you as compared to film. Then I suspect after that, perfect technical captures (difficult) even with the latest generation of LF film lenses, the results will be less than stella because the glass simply isn't up to the sensor. Now, if you mount the current crop of Schneider or Rodenstock Digital tech lenses, you should get stellar results. At least when the camera movements are perfectly adjusted and you nail focus