Response to TMX vs Acros

Actually, straight line response is not "technically correct". Kodak and RIT did studies years ago to find the most pleasing transfer curve. It turns out that it's S shaped, with the midtones at a slope of just under 1, and reduced separation in the shadows and highlights. Also critical was shadow detail- it had to be there for prints to be considered high quality. The info is from Photographic Sensitometry by Hollis N. Todd & Richard D. Zakia. I suspect Kodak has long forgotten those studies...

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