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- #61
Yes you are exactly right. But they also were color balanced to the light you should be using them in.... I left that off cause it wasn’t really talked about. But absolutely the ISO is specific to the speed of the film and it’s sensitivity to light only and doesn’t have anything to do with color.I always thought those numbers were associated more with ISO. You'd need a higher ISO (400) for inside because the lighting is usually much darker, and a lower ISO (100) for outside because usually it's brighter outside? I could totally be wrong though as I didn't do much film photography other than with disposables as a kid, and one class in college. It's totally possible they were also color tinted some since you would generally use one outside, and one inside? Digital has been a thing since I was in junior high at least so I have much more experience with that over film.
it also happens that the iso films were typically color balanced to tungsten (indoor) and sunlight (outdoor). You could always choose between them but the average was tungsten at 400 and higher and sunlight under 400.
the color temperature of the film was also printed on the box but people really only paid attention to indoor outdoor ISO. I should have clarified!