I just bought a motor drive for my Bronica SQ-Ai. It runs at a BLISTERING speed of .7 FPS! Yes, that's not a typo, point seven frames per second...

There was a method to my madness. Some SQ-Ai bodies (mine included) seem to develop a malady where the spring contacts in the battery compartment don't make very good contact when the camera isn't held level. Mine decided that if I pointed up more than about 15 degrees, the camera wasn't going to work. The "repair" would have cost as much as a used motor drive, and I'd still have to use 4 76 size button cells. The motor uses 6 "AA" cells and powers everything... it was a no-brainer.

Now if I can control the urge to get a 250mm...