Originally posted by normhead In this case, not a question of handling, but of how much weight and space it occupies in my carrying cases. It's really big lens from what I can tell.
I think what matter for carrying camera + lens is the virtual cube that fits into. For example, if I carry the K1 with DFA28-105, even though the 28-105 is relatively small, the total camera + lens isn't significantly smaller that I could carry it in a smaller bag. That's why if I'd get a Sony Alfa with lenses equivalent to the ones I use on a K1, I would be able to use a smaller bag either. I think, people regarding the Sony MILC are attracted by looking at the camera only, but afterwards in real use conditions don't save the space that would enable to fit in an apsc or u43 compartment.
You are mentioning lenses that were designed for film cameras, those camera were smaller than todays full frame DSLR.