M
mike_nunan
Kodakchrome 64 and 200 are still available in 135 at least:
Regarding the difference between XP2 and Portra BW (or T400CN which is very similar) I think it is a key point that XP2 has a very softly curved shoulder which makes it very hard to block up the highlights even with very major overexposure. ISTR that Ilford state that it can be exposed anywhere between 100 and 800 without any change in processing, although I wouldn't fancy trying to get decent scans off it at 100 as it will be very dense.
-= mike =-
Regarding the difference between XP2 and Portra BW (or T400CN which is very similar) I think it is a key point that XP2 has a very softly curved shoulder which makes it very hard to block up the highlights even with very major overexposure. ISTR that Ilford state that it can be exposed anywhere between 100 and 800 without any change in processing, although I wouldn't fancy trying to get decent scans off it at 100 as it will be very dense.
-= mike =-