I would use a slow slide film and bracket with your Aero and a known lens. Compare the two and you should have an idea. I have a 7 inch (2 actually) Aero E. and I doubt it the darkening is a half a stop. I think the real slowing might come from trying to use a color correction filter. I've never tried one with color, but my guess is a moderate warming.
Gene ----- Original Message ----- From: "Uptown Gallery" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, April 30, 2002 8:07 PM Subject: [Cameramakers] guesses on how to estimate reduction of light thru radiation-darkened lens elements > Hello: > > Post WWII aerial lenses like Aero-Ektar's have radioactive components that > darken some of the elements over the decades. > > Aside from warnings that color will be affected (I only intend to use these > lenses for b/w), I read that light output will be reduced...any idea how to > determine this? (Looking for 'filter factor' of discoloration) > > I think maybe exposing for expected results and comparing exposure of > negative is only thing I can think of. Can one discern fractions of an > f-stop of exposure shift? > > Murray > > _______________________________________________ > Cameramakers mailing list > [EMAIL PROTECTED] > http://rmp.opusis.com/mailman/listinfo/cameramakers > _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
