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Mamiya 55mm f/2.8 AF Lens for Mamiya 645AF, Phase One {58}
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$372.00
Mamiya 55mm f/2.8 AF: autofocus normal prime for 645 medium format.
The 645AF mount connects this lens to both Mamiya 645AF bodies and Phase One digital backs, making it a practical choice across film and digital medium format workflows. The f/2.8 maximum aperture gives you workable light-gathering in a format where fast glass is less common, and autofocus removes one of the traditional friction points of shooting medium format in the field. A 58mm filter thread means standard circular polarizers and ND filters slot right in without an adapter.
Medium format shooting demands lenses built to the platform's expectations, and this one covers the 645 frame without the compromises of adapted glass. For photographers already invested in the Mamiya 645AF or Phase One ecosystem, adding a lens that communicates natively with the body keeps metering and AF performance consistent. At f/2.8, there is enough aperture control to work in lower light or to manage depth of field on subjects where a stopped-down lens would not give you the separation you are after. This is a native mount lens for a serious system, priced well below what the same glass trades for new.
Who It's For
Photographers running Phase One digital backs who want a native AF prime without resorting to manual-focus alternatives will find the autofocus alone justifies the addition. Medium format film shooters using Mamiya 645AF bodies get a lens that meters and focuses correctly without any adaptation. Studio and location portrait photographers benefit from the f/2.8 aperture when shooting in spaces where strobe power is limited. Documentary or editorial photographers who need dependable AF on a medium format system will appreciate the native mount communication this lens provides.
Key Features
- 55mm focal length on 645 film plane
- f/2.8 maximum aperture for medium format
- Autofocus operation on 645AF and Phase One bodies
- Native Mamiya 645AF mount with full lens communication
- 58mm filter thread for standard circular filters
- Built for 645 format without adapted-glass compromises
FAQ
- Does this lens autofocus on Phase One digital backs?
- Yes. The 645AF mount communicates autofocus to both Mamiya 645AF film bodies and Phase One digital backs, so AF performance stays consistent across your system.
- What's the filter thread size?
- 58mm. Standard circular polarizers and ND filters attach directly without an adapter.
- How does f/2.8 perform in lower light on medium format?
- f/2.8 is workable light-gathering for medium format, where faster glass is less common. You get enough aperture to shoot in dim conditions or isolate subjects without stopping down.
- Will this lens mount on my Mamiya 645 film body?
- Only if it's a Mamiya 645AF. This lens requires the AF mount; it won't mount on older manual-focus 645 bodies.
- Is autofocus necessary on a medium format prime?
- For field work, autofocus removes traditional friction points-no hunting with a manual-focus 55mm on film or digital. Some photographers find it faster for handheld shooting.
- How does native-mount glass compare to adapted lenses for 645AF?
- Native mount keeps metering and AF performance consistent with your body. Adapted glass loses that integration and adds mechanical compromises.
| Specification | Value |
|---|---|
| Focal Length | 55mm |
| Max Aperture | f/2.8 |
| Mount | Mamiya 645 AF |
| Filter Thread | 58mm |
This description was generated using AI based on KEH's internal product standards, product expertise, and knowing what customers care about most. While we strive for accuracy, details may vary by individual item.
| Brand Name | Mamiya |
|---|---|
| Filter Size | 58mm |
| Focus Type | Autofocus (camera motor) |
| Lens Mount | Mamiya 645AF & Phase One |
| Lens Type | Standard / Normal |
| Max Focal Length | 55mm |
| Min Focal Length | 55mm |
