In a message dated 97-04-16 15:45:52 EDT, Gregg wrote: << I'm not a chemist, but I play one on the net, so take all of this with the standard grain of net-salt. On the otherhand, I am an amateur photographer, and have dealt with reciprocity failure in a number of settings. >> ----------- Gregg, I have a pretty good idea what all you are saying...thanks for the additional insight. George Zay