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using the btz system in flash photography, i have the following situation.
the flash hi aperture reading is f90, and the low flash aperture reading is f22 for a sbr of 9. using 100 tmax and consulting my tables, this gives me a efs of about 50 which i double to efs 100. this is my low exposure efs for
the image. here are my two questions.
1. is it okay to set the efs to 80 for more exposure?
2. i wish to make the white background i am using very white. i have been decreasing the sbr to 8 and consulting the tables for my development time. is this correct?
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