Quote Originally Posted by markbarendt View Post
Why?
If you use a #2 filter to start then the next filter is the next grade.

If you use no filter, then find you need to go up or down a grade, what filter do you pick, and what is the exposure change?

(If you know the answer to that - or have worked it out - great. But this used to bug me... I didn't really know how far the next step or what exposure it would take.)