I normally shoot color film but decided to try B&W. I just picked up filters and Tmax 100 film to use with my landscape pictures. What are the recommended stop adjustments for each filter below? Here are the factors given by the manufacturer. All filters are B+W MRC F-Pro's. Yellow 022M filter factor is 2. f/stop ______? Orange 040M filter factor is 4. f/stop _______? Light Red 090M filter factor is 5. f/stop ______? There's another darker red that has a factor of 8. What's its f/stop? ________? Is this one overkill? ___________? If I add a polarizing lens, are the f/stop adjustments additive or do you multiply them? ____________? Beside the recommended f/stops, any other recommendations you'd like to pass on that would help me? ______________? Thanks Alan.