Response to Thin Negatives from Film Speed Test

One more thing. Your setup was not correct. You indicated you had three targets, all in the same light. Wont' work! If you did it that way, you sure didn't measure a complete range of light between Zone I and Zone IX. The only way to do that is put the Zone I subject [preferably dark] in the shade, and the Zone IX subject [preferably white] out in bright light. If you are honest with yourself, that's the only way to get that range of measurements. In the same light, your "black horse, white horse" might work because they aren't normally at the extreme end of the exposure scale, but true Zone I and Zone IX subjects will NEVER meter correctly in that light. It's true. GO DO IT, don't just talk about it.

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