I have my new D800 but am travelling and my D300 is only from memmory, but I think there is a change in how auto-ISO works that frankly I do not like.
In (for example) "A" mode, auto-iso, in a dim room with the flash up, my recollection of the D300 is that it did the iTTL measurement and adjusted the ISO only if the flash was inadequate at full power. Did I make that up?
With the D800, the auto-ISO is setting the ISO based on ambient light, and appears to ignore the fact that the flash is going to fire. I've tried both spot meter (which forces BL off) and center. Basically everything came out at 6400 (which is where I had it set) even if the subject was at 2' away.
This means if shooting with a flash, auto-iso is pretty much useless unless you want it just for fill.
I don't have a separate flash to try.
Can anyone confirm? Is my recollection correct on the D300? How about others?
I keep thinking I am missing a setting somewhere, but the only way I have found to get the flash to provide the light instead of the ISO compensating is turn it off -- what I really want is for it to fill in only if the flash is not powerful enough.
I don't think it matters but trying this with a 24-70/2.8 Nikon lens.