I'm going to start getting a little more serious about black and white studio portraiture with flash, and I want to make sure that I'm going about exposure/development testing in the proper way. For outside use, I find what film speed will give a Zone I reading of an evenly lit black card in shade of at least .1 above film base plus fog. I determine development by using the previously determined EI and photographing an evenly lit white card in direct sunlight and placing it on Zone VIII. The development time that gives the appropriate relative density for zone 8 for my output process gives me my N development. That's all standard enough. Exposure determines shadow values primarily and development mainly determines the lighter values. With studio portraiture, though, the shadows are primarily determined by exposure plus fill light, and since fill varies... Is the proper way to go about this is to use the same exposure and development times for studio flash portraits that are used for outside photos, adjusting the fill level to taste, or should there be an EI/development testing procedure specific to the studio work used, and, if so, what should the process be?
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