I'll be heading for Berlin in a few weeks time. For the trip I'll be carrying some Tri-x for the b&w stuff and I would also like to take a few rolls of Provia 400F slide- film. Since I never shot on Provia, my question is as follows: How does the grain in Provia 400F compare to the grain in colour negative film like Portra 400NC? I know slides are extremely grainless at 100 iso or below, but how about Provia 400? Anyone had some uploads to show?