don't have a clue what any of mine weigh...should find out sometime. But the 8x10 Korona feels lighter than the 5x7 (4x5) B&J, but that is really not the problem..it would be the film holders, tripod, head that start to add weight - IMO. Jeremy and I spent the better part of a day lugging the B&J (his and mine) around a state park not so long ago. Had mine in a LowePro backpak, plus a seperate bag with film holders, and the tripod on a sling. After a few hours I know I was wish it all weighed a bit less...but then would not say I was in the best shape. That said, I would not hesitate to do the same thing with the 8x10 if I had a pack it would fit in. The question should be do you want to contact print or enlarge...I find that for me all 3 formats fit, it just depends on what I am doing and how I see the final image (I know that does not help - but now you can see why I have all 3 formats)