>Typically I use Manual mode for portraits, but it also >happens in Aperture priority. > I was actually wondering about what autofocus mode, not exposure mode.
At any rate, my D600 seems impervious to low light issues so far and I leave the illuminator on, as I have on all my bodies, (including my venerable D200). It seems to have to be very dim before it comes on, btw.
"Extraordinary claims require extraordinary proof " - Carl Sagan