Actually, meters were being used in the 1800s. They weren't what we think of as meters, but were used. Given that European aperture ranges were quite different from American ranges in the first halfish of the 20th century, that rules doesn't apply. It wouldn't have applied until about the late '30s-'40s. I have a Zeiss pamphlet scan from the '30s based on "Dr Max Leo's System," that lists out a given set of circumstances that together gave a mathematical formula to set your exposure.
Originally Posted by StoneNYC
Also, I'd like to know values for placements and as a reference point for the future. For instance, under sunny 16, I've had blown clouds and dark shadows. I found it good for narrower ranges of values, but I'd like something that allows me to work my way, and give me more usable information for my vision. Since I spend sometimes a longish time making an image, I'd rather stick to something quantified.