Archived posting to the Leica Users Group, 2003/12/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Here's a quickie excel file that will calculate it for you. It is small enough to put on a pocket pc if you'd like to use it in the darkroom. Just put in the value that you want to change in A1: http://www.Sleepytom.com/fstop.xls Tom > -----Original Message----- > > Does someone have a quickie formula from going from % of light > transmitted to stops difference from 100% > > e.g., 50% transmission = -1 f/stop? (that's an easy one but > you get the > idea) - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html