Quote Originally Posted by EASmithV View Post
http://www.hasselbladhistorical.eu/HT/HTCuC.aspx

there's the calculator thing...

I have a polaroid back, but that pretty much limits me to testing an exposure using 100 or 3200 speed film (unless I want to do some sort of equivalent exposure thing), and i've noticed that the fuji packfilms don't do long exposures gracefully. Also, the 100 looks better shot at 80, so i'm not sure if that's the film or my camera needing a CLA. Negatives look perfectly exposed, slides have yet to be developed.
I have the same "problem" Since early 2012 the Fuji 100 instant packfilm lost its 100 Iso down to 65/80.