Archived posting to the Leica Users Group, 2004/01/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The fullest tonality range is reached at a certain ISO, below or above there's no shadow detail or the highs are blocked. This is essentially based on the Zone System, and the 'ranges' of the film are usually tested using a densitometer on the film itself. From there you then adjust Film-Dev-Time-ISO to calibrate to your methods and taste. LB On Lundi, janvier 26, 2004, at 08:49 PM, Adam Bridge wrote: > On 2004-01-26 <feli@creocollective.com (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 > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html