The GX680 is a beast, with three lenses, two backs, compendium hood, light meter, etc, the whole kit weighs in a backpack weights 26 pounds. I use a Ries J100 tripod with a J250 head so add another 13 pounds. The camera itself with a lens is about 10 pound, and physically as big as a 4x5. That being said, I absolutely love the camera, it’s a pleasure to use and I bought it specifically for the perspective control and for the great selection of lenses and accessories.
Roger