And here is some scientific evidence that the Foma 100, 200, and 400 are virtually identical tonality wise. The attached file is a comparison of the Foma data sheets of the 100 200, and 400 emulsions. Spectral response curves are almost the same, the 200 sheets and 400 reaches farther into the 600nm spectrum, almost to 700nm, where the 100 and 200 rolls cut a little earlier. This confirms my suspicion above about them tonally looking the same.
So, the 200 is just a happy medium speed wise and grain wise between its two cousins. Perhaps it makes sense for Foma to only have the 100 and 400, and not have too many different products in times like these, where they can reduce inventory and cost of production? I don't know. But it is sad to see films go, that's for sure.
- Thomas