I haven't tried it out yet, but the early Omega B series like the B8 that I have will do 6x9. It's a bit less massive than a 4x5, a sort of mini-D2. I finally have all the needed accessories for 6x9, including a homemade lens cone to mount the El-Nikkor 105mm I snagged on ePrey, I just haven't produced a 6x9 negative I considered show-worthy, which is about the only stuff I print. I've been working (and enjoying some success) with the square 6x6 format and 80mm mostly.