Mamiya RB67 Pro-S

Mamiya built the RB67 in 1970 to settle one argument: a studio camera should put the photographer in control of the format itself, not the tripod head. The first body did that with a revolving back and bellows focus. Then in 1974 came the Pro-S, the refinement that turned a clever camera into the studio default. It did not change the optics or the size. It fixed the small ways the original could ruin a frame, and that is why working studios bought it by the thousand and kept it loaded into the digital years.

The changes were unglamorous and exactly right. The Pro-S added a double-exposure interlock so a half-cocked rotation or a forgotten dark slide stopped costing you a frame, and it added an orientation indicator in the finder that told you at a glance whether the back was set to portrait or landscape. A scale on the side of the body shows the extra exposure the bellows extension costs as you rack out, the kind of detail you only appreciate after the original burned you on a close-up. None of it was a headline. All of it kept negatives alive.

It is still a brick. Loaded with a 90mm and a 120 back it runs past four pounds, and you do not walk with it; you set it up. You focus with that bellows, racking the whole front standard on a geared track, so macro is native here when other 6x7 bodies need tubes. The waist-level finder shows a big bright 6x7 ground glass, flipped left to right like every reflex of this breed, and your hands argue with your eyes until they stop. The mirror lands with a mechanical clunk you feel through the legs.

Everything runs without a battery. The shutter is a Seiko leaf shutter inside each lens, from long exposures up to about 1/400, and because it sits between the glass it flash-syncs at every speed. That is the whole reason studio shooters loved this body. Drop your background two stops and fill a daylight portrait with strobe at top speed; the focal-plane crowd cannot. A daylight-fill reading off the Zone Light Meter app pairs straight with that all-speed sync, no sync-ceiling math at all.

The honest weakness is the one Mamiya never touched: there is no meter in the body, not on the original and not on the Pro-S. You clip on a prism finder with a cell or you carry a handheld and learn to love it. The film backs save you elsewhere, self-contained 120 or 220 magazines with their own dark slides, so you swap color for black and white mid-roll without losing a shot.

Today the Pro-S is the cheapest serious 6x7 there is, and the smart buy over the bare 1970 body for those interlocks alone. People cross-shop it against the Pentax 67, faster in the hand but it slaps like a screen door, and against the later electronic RZ67 that film shooters often do not want. For a tripod and controlled light, the Pro-S still wins on dollars per square centimeter of negative.