Rating 160 speed portrait film started long ago with Kodak Vericolor (VPS) a film with so little underexposure latitude that the shadows to the lower mid-tones would go muddy. So people started rating it at 125, or 100, or even 80 to get rid of the muddies. Yes it did increase contrast SLIGHTLY, but it was still much less contrasty then the non-portrait film. Fuji NPS was similar. Where you are shooting the more contrasty NPC, you may or may not need to adjust the ISO. I would shoot a test roll bracketing normal, + 1/2 stop, + 1 stop ( or 1/3, 2/3, 1 stop if your camera allows) look for both detail in shadow and detail in dark and light clothing, and choose the highest ISO that you are happy with.
BUTCH "Each man had only one genuine vocation - to find the way to himself" Hermann Hesse (Demian) - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
