yes you are right, that's why I was thinking that maybe using electronic flash with correct filtration close to morning or afternoon daylight temperature can be used for film speed / development test. I used reference to the sunlight bc I'm going to use film under sunlight, only test would be performed using flash.
Originally Posted by Gerald C Koch
I'm trying to do the film test as described in Way Beyond Monochrome book using stouffer step wedge. I was trying to use sunlight but always light changes (or I'm too slow) all the time at my location and I was not able to get the consistent results. That's why I was thinking to use flash with gel on it to be close to the sunlight.