Or it might have to do with the development system used by the ISO standard, but maybe that should be a different thread?
For the original poster, the options seem to be.
1. Guess and revise. Shoot some picture rating the film at 1/2 box speed. Develop and print your negative (or scan....) Do you have enough shadow detail? Does the tonality look right? If not, adjust.
2. If you have an incident meter. You can do Phil Davis's "Beyond the Zone System" tests, or Ken's simplified system. Doesn't the View Camera Store offer BTZS testing?
3. If you have a spot meter, and access to a densitometer, you can do traditional zone system testing.
4. ?
A good current book on all of this is Way Beyond Monochrome, 2nd Edition by Ralph Lambrecht and Chris Woodhouse.
Bookmarks