Originally Posted by
Nathan Potter
It doesn't matter what the DSLR is calibrated to, or if it is calibrated at all. If you want perfect film exposures you need to use the film to calibrate the DSLR meter. The simplest way I use is to attach a logD 3.0 step tablet to the LF film then use the DSLR to meter an 18% grey card. Then over expose the LF film by about 5 stops so the grey card exposure falls at about log D 1.5 on the log D 3.0 step tablet. Use your normal development for the film/DSLR you have chosen to calibrate. The image of the step tablet on the film will show exactly where zone II or zone VIII falls if that is your choice for shadow and highlight texture values. There are other procedures that amount to the same thing and as I said previously check a number of publications describing such techniques.
Nate Potter, Austin TX., Steuben ME.
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