Quote Originally Posted by Mark Feldstein View Post
I avoid using polarizing filters in any portraiture. ND filters at ISO 250 probably won't help you out much.
Mark, how do you figure that? If I shoot Tri-X at EI 250 in broad daylight, so that f/11 or f/16 would be 'normal' apertures for portraits for 1/250th shutter speed.
Now, I want to shoot at f/4 instead. The difference from f/16 to f/4 in terms of stops is four stops. Put a four stop ND filter on the lens and shoot at the same shutter speed, but a four stop wider aperture.
How is that NOT helpful?