Archived posting to the Leica Users Group, 2004/01/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> (Feli di Giorgio)> thoughtfully wrote: > >I have read that the true speed of TMX3200 is about 800-900asa, Delta > >3200 is 1200asa and Neopan1600 is really about 640asa. > > > > Now what does this mean? I'm never clear on just what a films "real" speed is. > How do you test it? How do you know? > > Thanks > > Adam > -- I'm hoping that Richard Knoppow jumps in here and saves the day, since I can only give you an amateur answer to that question. I picked up the information from various people who dwell in the dark art of measuring the density of their negatives etc. Take it away Richard... Feli - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html