I have been looking semi-seriously at a medium format system. 6x6 preferably. Rb67 seems a little heavy for what it is, and all the other brands need batteries. Is there a medium format system, besides Hasselblad and Kiev, that doesn't use batteries? I don't what to be out in the field and suddenly have a non functioning camera. Or if batteries are it, then what is the most robust of all the systems? Cameras I have been looking at, Bronica SQ series, Mamiya RB67. Thanks for the help.
Drew