in my experience with scanning, any transparancy or negative that is dye based scans reasonably well. that's why scala negatives get good reviews. it's the black and white silver negs that are hardest to render. the grain blocks, reflects and scatters light and creates all manner of headaches compared to dye-base material. still, it's possible to get perfectly presentable scans for web use with silver based negatives since the resolution is so basic and minimal. beyond that, to even begin to pretend to imitate the beauty of a wet darkroom print, the scans need to be done on drum scanners costing....well...ahelluvalot.