jd40, look at the Mamiya RB67. Its a horse of a camera, and so you dont turn the camera to take protraits the film back revolves. Hence RB (revolving back). Also, what it is worth, its a 6cm x 7cm. Nearly the same ratio as a 35mm. Look at the used section of auction sites on the web. I believe the Hasseys are 6 x 6.