Response to How do YOU determine EI?

I had a photo teacher that always told his students to take the original EI and cut it in half. Of course that works for some people, but I used "The Negative" and a densitometer. Another thing people do is to shoot a roll of film, or in my case 2 or 3 sheets of film. Shoot with the original EI and then the same with the next slower speed and then the next slower speed. (ex: 100, 80, 64) Then I just picked which one appealed to me. Magically, it was the same speed I had gotten from the textbook procedures. Happy shooting!

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