Response to rating film

David Kachel once wrote that most zone system photographers, after extensive film testing, end up rating most films at about 1/2 the manufacturers rating. So ISO 400 films are usually rated at EI 200. I've found this to be pretty much what I've found with the 3 or 4 films I've tested and use. The exact rating depends on which developer you use of course.

[ Previous | Next ]