Iv shot with 100 ISO and below (lo1, lo2, lo3) with my D3 several times. Im trying some ring light flash work with the SB-29 and even at F32 some times at minium focus the captures will somtimes will be over exposed. And since there TTL dosnt work with this flash on the D3. So using the low ISO is a really good feature IMO
Another time I use this feature is when shooting outside with the 85 1.4 or the 200 f2 and want to keep the lens wide open and the shutter speed needs to be higher than 1/8000.
If I had a Noct(and some day I will) this feature keep you from having to use ND filters over the naked front element.
Ok, so it's basically just a way of EV compensation? That's what I was wondering. I couldn't imagine it was for reduced noise like I used to use Velvia 50 for the absolute least amount of grain possible.
Thanks for the explanation!
I just checked I guess(now understand) the low 123 stands for (160 ISO , 140 ISO, 100 ISO) Sorry about that. Ill blame my error on the flu medicine. Why dont they just say what ISO. Its hard for us old timers that used to have to lift the shutter speed dials on are F2 and set are ASA or Din.