Mamiya 645AF Medium Format Camera
The Mamiya 645AF is a Medium Format medium format camera — known for its Medium Format Film SLR and Phase Detection Autofocus. Check GearFocus for current availability, with buyer protection on every purchase.
Mamiya 645AF Medium Format Camera
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Overview — Mamiya 645AF
Key Features — Mamiya 645AF
Medium Format Film SLR: Shoots on 120/220 roll film in the 645 format (6x4.5cm frames), delivering significantly more detail and tonal depth than 35mm film.
Phase Detection Autofocus: 3-point phase detection AF system provides reliable, fast focus acquisition — a notable capability for a medium format film camera.
Mamiya 645 Lens Mount: Compatible with the full range of Mamiya 645 AF and manual lenses, giving access to a mature ecosystem of high-quality medium format glass.
ISO 25–6400 Range: Wide ISO range accommodates slow, fine-grain films in bright light through fast films for low-light or indoor shooting.
Optical Pentaprism Viewfinder: Eye-level optical viewing provides a bright, natural composition experience for a medium format SLR.
Aluminum Alloy Chassis: Die-cast aluminum and magnesium construction gives the body professional-grade rigidity and durability.
Specifications — Mamiya 645AF
| Spec | Detail |
|---|---|
| Use Cases | Studio |
| Type | Medium Format |
| Sensor | Medium Format |
| ISO Range | 25 – 6400 |
| AF System | Phase Detection |
| AF Points | 3 points |
| Burst Rate | 1.2 fps |
| Image Stabilization | None |
| Display | Top LCD panel |
| Viewfinder | Optical Pentaprism |
| Storage Media | Other |
| Battery | 6x AA batteries |
Description — Mamiya 645AF
The Mamiya 645AF is a film medium format SLR built around a die-cast aluminum chassis with magnesium and plastic panels, measuring 153 x 128 x 184 mm and weighing 1730g. It uses the Mamiya 645 lens mount and features an optical pentaprism viewfinder for direct, high-fidelity framing. Autofocus is handled by a phase detection system with 3 focus points, making it practical for a broad range of shooting scenarios without manual focus intervention.
The supported ISO range of 25 to 6400 allows use with a wide variety of film stocks. Burst shooting reaches 1.2 frames per second with burst mode enabled. The integrated flash system provides dedicated Mamiya TTL metering with X-sync at 1/125s and a standard ISO hot shoe.
Camera status is monitored via a top LCD panel. Power comes from 6x AA batteries, rated for approximately 100 rolls of film per set. Weather sealing is not present, and the camera has no digital connectivity of any kind.
Pros — Mamiya 645AF
- ✓Phase detection autofocus with 3 focus points — a significant feature for a medium format film SLR
- ✓Wide ISO range of 25 to 6400 provides flexibility across varied lighting conditions and film stocks
- ✓Rugged die-cast aluminum chassis with magnesium panels delivers a professional-grade build
Cons — Mamiya 645AF
- ✗No weather sealing — the bodyDesign.weatherSealing field explicitly lists 'None', limiting use in adverse conditions
- ✗Body weight of 1730g and dimensions of 153 x 128 x 184 mm make this a bulky, less portable system
- ✗Only 3 AF points — modest coverage compared to more modern AF systems