I am digitising 35mm slides, 120 & 127 black & white negs and some glass negs of strange format taken by my grandmother when she was a girl c.1885. I am using a CanoScan D2400U with the OEM software and getting some very good results. The film carriers are pretty versatile and you could probably make your own to a specific size if necessary. It is, however, as incredibly tedious as others have remarked.