Ok here is my problem, years back I had done testing with a color chart and each filter by exposing the film with the filter. From the negative of the color chart I picked the best "factor" that gave me a Zone V. So in the move I lost the color chart and I lost the list with the factors I had made. Not having a way to test now I was following the reccommended factors with less than satisfactory results. So unpacking my old issues of View Camera I came accross about an article by Simmons about the filter factors and how Hutchins uses the "meter through the lens and add..." So I am wondering has anybody used this method? I understand that meter cells are not color corrected, but I would like to know how close this method can take you to a correct exposure.