OK someone explain to me the difference between BTZS and the Zone system.
I understand the Zone System conceptually - expose for the (relevant) shadows by metering the shadows and setting them as Zone V and figure out the luminance range by metering highlights, develop for the (relevant) highlights by adjusting development time for the corresponding luminance range. So how is that different from BTZS?
Also, somethign else I am having problems understanding conceptually: incident light meters and reflected lightmeters are both calibrated to the 18% gray standard. Thus, the meter reading on an incident light meter should result in gray subjects, right? A white cat in the snow would come out ...gray? There are people who claim that you don't have to worry about that when using incident light meters, only with reflected lightmeters.
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