Your example is extreme, but most films seem to be slightly overrated in regard to ISO. I always shot Portra 400 at 320 and Portra 160 at 100. I shot Delta 3200 at 1600. I shot TMax 400 at 200 then processed it gently in a d-76 1:1 soup. It's all in determining what works for you with the processing that is available. ISO numbers are only a guide. On Oct 18, 2006, at 9:37 PM, [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 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
