Response to Acros in Microphen - and why are ISO ratings inflated?

True, but ISO rating is supposed to be a standard. It's not based on "getting plenty of shadow detail". That's a subjective opinion. ISO standards are supposed to be objective. Pretty much every book and article I've read on film testing, from Ansel Adams to [insert your favorite film tester] has reached the conclusion that if you 1/2 the marked ISO rating you'll be about right when it comes to exposure.

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