It moves the exposure up, or down, the sensitivity curve. Giving more weight to the shadows, or highlights. Simple as that. It takes a bit of experience to know when to do which.
Most wedding pros shot color negative about 2/3 stop slow (100 v 160) because most of the labs were calibrated to make the best prints at that speed. Of course that was in the old days, BD. --graywolf [EMAIL PROTECTED] wrote: > Can someone please explain to me the reason that people load 50 iso film and > shoot > it with the camera set at 12 iso (numbers just for example). > > What are the benefits of doing this? It doesn't change the speed of the > film...just > the speed the camera's meter thinks the film is. I assume it is so you can > selectively over or under expose a bit, but can't you just do that with your > exposure setting? > > As you can tell, I don't understand why people over or under rate the iso of > their > film deliberately. > > James > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
