Hi gang, OK, so I'm really enjoying a nice leisurely read of Ansel Adams' "The Negative". For those who haven't had the pleasure of reading it yet, I'll mention that this is a REALLY GREAT BOOK. All that talk about the Zone System being complicated? Why not at all! Adams makes it all quite straightforward.
Now for my question.... I'm quite familiar with the concept of long-duration reciprocity failure when making extremely long exposures, and I understand the physics behind it as well. What I wasn't familiar with was the fact -- apparently -- that when using electronic flash, flash duration can be sufficiently short that one needs to worry about short-duration reciprocity failure. Is this only a problem with older emulsions with poorer reciprocity characteristics? (For example, Tri-X.) Anyone have experiences in which they needed to make exposure corrections when shooting with flash using such an emulsion? Thanks in advance, Bill Peifer Rochester, NY - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
