Archived posting to the Leica Users Group, 2006/01/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]between 11 and 12. I think :-) Op 16-jan-06, om 23:07 heeft brad daly het volgende geschreven: > esteemed optical knowledgees, > > i need to know how to convert EV readings to lux. i have found the > formula > > lux = 2.5 x 2^EV > > siting here at my desk, i have an EV reading of 8, so > > lux = 2.5 x 2^8 > > or > > lux = 640 > > what i really need to know is this, if the original formula is > indeed the correct one. that is, i need to be able to solve for x > in this equation: > > 10,000 lux = 2.5 x 2^x > > i need to know what EV reading equals 10,000 lux. > > the problem is that i can't remember how to solve for x as an > exponent. fairly simple math, i realize, but something i've > completely forgotten how to do. > > > > -- > brad daly > brad@bradbrad.com > http://www.bradbrad.com > > What Would Bill Hicks Say? > > All photographs are accurate. None of them is the truth. > --Richard Avedon > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >