I have a Bessa R and compared to my Nikon S2 it feels really light and maneuverable. All of the Bessas are built well the only differences are the mounts they use and a few features. The L is LTM and has no RF, the R is also an LTM but has the RF, bothhave TTL as far as the other models, all inknow is that they have different mounts, either Cosina, LTM or M. Check out kenrockwell.com for more info.