Quote Originally Posted by Thilo Schmid
If I were using a spot meter for my exposures, it would be a simple matter of metering through the filter. However when I am using incident metering I am not able to meter through the filter and must assign some exposure factor to the filter effects.
I did recognise that point. But what keeps you from using a spot- or normal reflective meter for determining filter factors "at home" as you would do with your densitometer? I can't belive that you do not even own one.