Relative speed will be tested within each sensitometer. So, if sensitometer "A" shows 2 stops between two films and sensitometer "B" also shows two stops between those same two films then the response of the two sensitometers will be deemed OK for home darkroom film speed comparisons.
Originally Posted by Photo Engineer
I know a few posters have shown some interest in absolute sensitometer calibration, but only about 5 of us here care about that, and I'm not going to address that. For everyone else, they just need to know how much faster or slower some oddball film from another continent is, compared to their favorite film that was just discontinued.
Ideally we'd test a number of films with different spectral responses, but lets see how just two films compare. It could be that the two films response to the LED units are so different that further testing is not needed. If the first test is close, I can keep going with other films.
Last edited by ic-racer; 10-14-2012 at 09:47 PM. Click to view previous post history.