Response to How do YOU determine EI?

I just take a bunch of pictures of the kinds of things that I usually shoot, exposing at plus/minus one stop from the rated ISO at 1/3 stop intervals. Look at the negatives to see which has the minimun acceptable shadow detail. And then use that EI. Anything else is too complicated for (my) practical use. That's for B&W (and color slides purchased several bricks with the same emulsion number). For color negative I just use one stop more exposure than rated ISO.

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