re. zeiss glass...
I tend to find the nicest variety for film making are the early Rollei types. made in West Germany by zeiss themselves in the peak of human/hands on manufacturing, where skilled German engineers were assembling for the premium photographic market the Rollei Zeisses were targeted at. The key with these lenses is that there are HFT versions (multi coated) and single coated versions. The HFT's perform in the same way as Zeisses own T* coatings as found on the Contax's. The single coated ones (without HFT on them) have the same sharpness, but their contrast is slightly less meaning they're smoother and don't impact as punchy look to the image, while still maintaining the sharpness.
attributes like this really help in smoothing out the slightly ragged, clinical and harsh digital look we're used to seeing from anything less than an Alexa. A zingy contrasty lens like the contax zeiss is lush in photographic terms but to me is often a little too clinical and doesnt help matters if a non digital look is desired