On Aug 18, 2013, at 3:00 PM, Ben Goren wrote:
Instead of shooting your white balance target today, you'd shoot a chart such as a ColorChecker or QPcard or whatever your favorite field target is. (And, as I mentioned, I can't sing the praises of the ColorChecker Passport highly enough.)
When you get back to the studio, instead of doing a click white balance, you use a RPP preset to develop the shot... feed the image to a script that automatically does everything behind the scenes and spits out the numbers that you paste back into RPP.
And that's it -- you're done; white balance _and_exposure_ are now perfectly normalized.
Experience tells me that small changes in the angle of the chart in relation to the camera and the light source make very large changes in the relative exposure/light intensity on the chart in relation to the scene. I don't see how one could expect to hold the chart at exactly the right angle to the rest of the scene to get a "perfectly normalized" exposure even five times out of ten. Given that natural light is as agreed subject to interpretation, this quest for an automated "perfection" seems a chimera to me, at least regarding exposure. respectfully, Jeff Stevensen Jeff Stevensen Photography 82 Gilman Street Portland, ME 04102 207-773-5175 207-807-6961 mobile http://www.jstevensen.com http://photosightlines.com