analogsnob
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- Oct 22, 2008
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- 112
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Although I have stated it empirically I think we mean the same thing. To restate in different terms my normal is that curve which contains the point where a Zone V exposure intersects with 0.90. N+1 is the curve which contains the point where Zone V exposure intersects 1.10. From a visualization standpoint the Zone moves or transforms is perhaps more precise.
I am choosing only certain of the infinate number of possible curves by defining certain aim points and using only those curves that meet at those points. When standing infrount of the subject I am making a choice of which value is placed and another for the developing strategy. I could look at the problem from the perspective of a luminance value which"falls" on zoneX being processed to yield a zone VIII density in the print but it was always easier to think of it "moving". So to put it in curve terms I am choosing to process the film using the time that yields the curve where a Zone VII exposure yields a density of 1.10 which is also (in this example) the curve which contains the point where a Zone X exposure (luminance value) yields a density in the negative of 1.50 which I call (arbitrarily) N-1.
You are right the Zones donot move along the same curve but that also is not what I have been trying to say.
I always found that a curve set without the zone system definitions and the short hand associated with it virtually useless in the field. The concepts of "place" "fall" and of Zones "moving" with development may be scientifically imprecise but they are practical and intuitive in use.
I am choosing only certain of the infinate number of possible curves by defining certain aim points and using only those curves that meet at those points. When standing infrount of the subject I am making a choice of which value is placed and another for the developing strategy. I could look at the problem from the perspective of a luminance value which"falls" on zoneX being processed to yield a zone VIII density in the print but it was always easier to think of it "moving". So to put it in curve terms I am choosing to process the film using the time that yields the curve where a Zone VII exposure yields a density of 1.10 which is also (in this example) the curve which contains the point where a Zone X exposure (luminance value) yields a density in the negative of 1.50 which I call (arbitrarily) N-1.
You are right the Zones donot move along the same curve but that also is not what I have been trying to say.
I always found that a curve set without the zone system definitions and the short hand associated with it virtually useless in the field. The concepts of "place" "fall" and of Zones "moving" with development may be scientifically imprecise but they are practical and intuitive in use.