What are different ways that one can test for reciprocity failure to determine the increase in either light level or exposure time that's needed for a correct exposure. I've not done this previously.
For example, do all zones experience the same reciprocity failure? Is reciprocity strictly a characteristic of time, or can the level of light also have an effect on the degree of reciprocity failure? If so, would one want to test reciprocity for one of the higher zones like 8, or for one of the lower zones like 2 or 3? I suppose one could accompany the increase in exposure time with a change in development time. But then, what's a good way to test for this as well? (Perhaps, test for reciprocity to get the correct Zone 3, and then alter the development to obtain the correct Zone 8.)
Lots of questions, so any ideas on how to approach this problem would be appreciated.
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