Quote Originally Posted by Sirius Glass View Post
i would not go that far. I have found that box speed give the best results because the exposure range is balanced around it. Most of the testing for the elusive EI is based on the result that the camera, lens, light meter or darkroom technique are not properly calibrated. Typically people shooting at half the box speed are merely compensating for aiming the light meter to include too much of the sky. It is much easier to blame problems on the film manufacturers than accept that they are systematically making the same mistake or that the camera and/or the light meter is not properly calibrated.
Actually by studying the data sheet from Kodak http://www.kodak.com/global/en/profe...4050/e4050.pdf referring to the section judging negative exposures for the gray card and the characteristic curves they would suggest setting the meter at ISO 200 would give you a closer result.