Mamiya 645 Pro

Hold a 645 Pro to your eye and it handles like an oversized 35mm SLR, not a box you cradle at your waist. That was always the point. Mamiya built the 645 line for working photographers who wanted the bigger negative without the bulk and the Hasselblad price tag, and the Pro, which arrived in 1992, refined the modular system the 645 Super had introduced back in 1985. The Super was the camera that brought removable film backs to the line. The Pro polished that already-modular body: interchangeable film backs with inserts inside, swappable finders, a motor drive option, fifteen frames of 6x4.5 on a roll of 120. Portrait and event shooters bought in for exactly that flexibility.

The focal-plane shutter is the part you notice first. It fires with a solid mechanical thunk, quieter and far less violent than the mirror crash on a Pentax 67. Manually it runs from about 4 seconds up to roughly 1/1000, with flash sync at 1/60; the long 8-second end only opens up in aperture-priority mode with the metered AE prism on top. The standard prism finder is bright, shows the full frame at decent magnification, and focusing on the ground glass is easy in daylight. Build is plastic-skinned over a metal chassis, lighter in the hand than you expect, which also means it is not the tank a Hasselblad is.

Metering depends entirely on which finder you bolt on, and this is where you have to know what you actually bought. The plain prism is a dumb pentaprism with no meter at all. The metered AE prism gives center-weighted readings and aperture-priority auto, genuinely useful when you are moving fast through a portrait session. If your body wears the basic finder, an incident or spot reading from the Zone Light Meter app is how you place exposure. It becomes the meter the body shipped without.

The modular trick people love is the film back, and it is worth getting the mechanism right. The removable back carries a dark slide, so you can pull a half-shot magazine off mid-roll and clip on a fresh one, jumping between color and black-and-white without burning frames. The insert is the spool carrier that loads film inside a back. It is not light-tight on its own and is not the part you swap in the open. Treat the whole back as the unit you change, and you are fine. Mamiya 645 lenses are plentiful and cheap for what they are, and the 80mm f/1.9 and 110mm f/2.8 are the portrait glass people chase.

The honest weakness is the electronics. The Pro depends on a battery for the shutter, so a dead cell or corroded contacts means a dead camera, and the metered AE prisms are the parts most likely to fail and the hardest to replace cleanly. A body that has sat in a closet for a decade usually needs the seals redone and the prism contacts cleaned. People cross-shop it against the Pentax 645 and the Bronica ETRS, and the Mamiya tends to win on lens selection and the convenience of those swappable backs. Buy one that has been recently serviced, feed it good batteries, and it earns its keep.