I have 2 D800s and unfortunately they only work in studio....

rayman 2 wrote:

you have to learn how to use them... they are different to D3 and D700..

I very often use the method that Hasselblad uses with its true focus..

Set the AF to exposure priority at the AF-s setting.... use the middle af field

and point the af field to the eyes.... keep the finger on the trigger on halfpressed and recompose

then shoot the series..... that works 99 % of the cases in low light and with very high precision

even with 36MP...

Peter