Maybe not surprisingly, I have a Pentax 645D in my bag with four lenses--35mm, 55mm, 120mm, and 300mm. I also have an RX-1. Only one lens for that, 35mm. I am not thinking of getting another. Then things like a right-angle finder, cable releases, a bunch of ND filters, batteries, gloves, etc. A carbon fiber tripod with a P0 head--not in the bag. Also a portable tracking mount for star photography, but I recently changed that and have not been out with it, but it does fit in a small belt bag.