My attention has turned to early light meters, such as extinction meters. How commonly used were they? How accurate--I'm guessing maybe about a stop once you've figured them out? Fairly reliable? What were the better ones 1900-1940? I have a Zeiss Diaphot I've been playing around with. I like its slim form, and so far I seem to be getting a usable reading from it (within a stop) about ~two thirds of the time.
Kent in SD
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