I'm curious about the various "traditional" films like FP4, Efke 100 or perhaps Tri-x and their use for increased development. Would like to maintain smooth skin tones and not too much grain, by underexposure and the expanded development of zones III - VI. Is it possible to "open up" these tonal areas beyond what a "normal" development would yield in a typical scene, as long as I don't get too near the shoulder?
I'm currently using Efke 25 to expand these zones, because it can build so much contrast. It means careful metering and development to keep track of tonality in tungsten light. The down-side is with the slow shutter speeds and shallow dof I end up with using the 25. My concern is that when I go up to the 8x10, I won't have a realistic shutter speed and dof will end up paper thin due to bellows extension. I'm running into a wall now with how far I can push things realistically. Does anyone have any experience with this same procedure and the other films I've listed above? How much expansion can I squeeze out of FP4, for example, to expand these zones? I would prefer to work with slower films for the tight grain they have. Tri-x would be fine with an 8x10, but M/F or 4x5 might start to look too gritty with the very long development times I'm working with.
How much expansion can the middle zones deal with, typically, to open up a "traditional" film for this application?
thanks for your input, tim
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