I've lately been taken with Graflex RB cameras and now have three, in all the sizes up to the 4x5, my latest addition. The 4x5 has a petzval projection lens on it at the moment. I got tired of the way the very short DOF of this lens would screw me up when I had to exchange the GG for the holder on the Speed. With the RB, I just compose and shoot. I now have to rig a sort of harness for these beasts that lets me carry some of the weight on my shoulders–– my arms are getting tired. I imagine the old-time sports photographers (let alone Dorothea Lange) developed some serious arms carrying the 5x7 around (before the advent of the "Big Bertha").