dear all, i'm have two sekonics, which read differently. i'm trying to use a digital slr still camera to find out which of the light meters works. please let me know what the settings should be?

another related issue: i am filming with 650 and 1 k tungsten lights and gelling up some windows nearby. i'd like to know how exactly to set a digital slr white balance in order to be able to judge color from still pictures

thank you so much - - - a quick answer is much appreciated!
best,
sonya