>One feature of the D800 that will have wedding photographers >raving is not being talked about much. Imagine being able, in >varying light and harsh backlight, being able to have >perfectly exposed faces every time with no compensation. The >face tracking 3D metering does that. Works with iTTL flash as >well.
I can imagine that...before digital...or right now...using color negative film. Perhaps with the D800, we will finally be back to the lattitude of color negative film and the accuracy of the old Nikon 3D multi-sensor balanced fill flash on those cameras. That flash system was/is phenomenally accurate, even with slide film. The first generation of iTTL always seemed to leave a little to be desired (too much flash power at times). But the samples make it look like Nikon has caught up to their older flash system finally.
Perhaps the only negative with the new iTTL will be the shutter lag due to the preflashes...it's still longer than when using a non-flash exposure. The older 3D multisensor balanced fill flash had no such shutter delay, because it used a shorter preflash duration, and primarily measured off the film during exposure. But you can't do that with a digital sensor.