The three top scorers are from Nikon and Sigma – the Nikon AF Nikkor 50mm f/1.4D, Nikon AF-S Nikkor 50mm f/1.4G and Sigma 50mm f/1.4 EX DG HSM. All three managed 32 on the DxOMark scores putting them at the top of the list for 50mm lenses on the D800. Strangely the Sigma 50mm lens is the most expensive of the trio, but given that the price difference is not much more than $100 between the three, unless budget is a real concern, this and the Nikon 50mm f/1.4G are the two top choices. That said, the performance of the Nikon 50mm f/1.8G makes it a very worthy consideration if budget is a concern.