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Just to give people an idea of the numbers we're working with here: According to The Internets and Google (who know everything and are NEVER WRONG), Kodachrome
by fennecfoxen 12y ago
Just to give people an idea of the numbers we're working with here:
According to The Internets and Google (who know everything and are NEVER WRONG), Kodachrome's dynamic range was about 7.3 stops (so your whitest white is 2^(7.3) ~= 157 times brighter than your blackest black). Kodachrome was a color positive film (i.e. slides). Slide film is notorious for being tricky to expose right.
For comparison, a nice modern black-and-white negative film like Kodak Tri-X 400 has a range of about 13.5 stops (white is 11,585x brighter than black). It's also 2-8 times as sensitive overall as Kodachrome (which came from ISO 25 to ISO 200) and probably has comparable or smaller grain size.
(Of course, black and white is easier, and a better comparison would be Kodak Portra, but I couldn't Google up the numbers readily enough to present here.)
- briandear 12y agoThanks for those numbers! I couldn't remember the exacts.. Another difficulty of Chrome films where that the color would shift badly if you pushed or pulled it. You could push and pull, but not as much as negative film. The crazy thing is that Nat Geo shot almost entirely on Kodachrome and their photos remain some of the most amazing ever created. They'd often shoot with just available light as well. Incredible stuff.