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Mamiya 45mm f/2.8 AF Lens for Mamiya 645AF, Phase One {67}

Model #229107
  • $186.00

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New in box complete with manufacturer's USA warranty. Not previously owned or used.
Essentially new with no signs of use. “Open box.” In manufacturer's packaging with original accessories and instructions. 180-day warranty.
Barely used with virtually no traces of wear. Only the closest inspections will reveal slight use. Lens glass could contain light dust or debris. Excellent picture quality. Accessories usually not included, unless noted in listing. 180-day warranty.
Lightly used with limited signs of wear. Exceptionally nice but may have slight wear on finish visible. Lens glass could contain light dust or debris. Excellent picture quality. Accessories usually not included, unless noted in listing. 180-day warranty.
Noticeably used with average signs of wear. Shows moderate wear for the age of the item, with the possibility of blemishes and/or minimal dings. Lens glass may have average dust and zoom/focus ring tension may have slight looseness or tightness overall, but will not affect picture quality. Accessories usually not included, unless noted in listing. 180-day warranty.
Frequently used with above-average wear. May have dents, dings, or finish loss. Lens glass may have small scratches, dust, and blemishes, and zoom/focus ring tension may have moderate looseness or tightness overall, but should not affect picture quality. Accessories usually not included, unless noted in listing. 180-day warranty.
Heavily used with extensive visible wear. Equipment is rough, with multiple impressions in the finish, excessive finish loss and brassing. Glass will have marks, fungus and/or heavy/cloudy haze which could affect picture quality. Accessories usually not included, unless noted in listing. Not covered under KEH warranty.
Non-functional or damaged. Equipment will not work. Usable for parts. Not covered under KEH warranty and non-returnable.
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Mamiya 45mm f/2.8 AF: native wide-angle for the 645 system

The Mamiya 645 system has always been a working photographer's medium format platform, and the 45mm f/2.8 AF is one of its core native lenses. Autofocus support means you're not sacrificing speed for format size, and the f/2.8 maximum aperture gives you meaningful subject separation at medium format scale. The 67mm filter thread keeps your existing polarizer and ND kit in play.

Compatibility runs across both Mamiya 645AF bodies and Phase One 645-mount digital backs, so this lens follows you whether you're shooting on a film body or a current digital system. That cross-platform reach is what makes native 645-mount glass worth holding onto. A 45mm lens in this system gives you a genuinely wide perspective for the format, well-suited to work where you need to include environment alongside subject.

Who It's For

Architectural and interior photographers who need a wide field of view with autofocus on a medium format body will find the 45mm f/2.8 AF a direct fit. Phase One 645-body shooters looking to round out a native lens kit benefit from the confirmed cross-platform compatibility. Portrait photographers who want environmental context in the frame than tight compression can use the f/2.8 aperture for subject-background separation. Film shooters working with Mamiya 645AF bodies get autofocus at a focal length that covers landscapes and editorial work with equal ease.

Key Features

  • 45mm focal length with f/2.8 maximum aperture
  • Autofocus support on Mamiya 645AF and Phase One bodies
  • 67mm filter thread for standard accessories
  • Native 645-mount glass compatible across film and digital systems

FAQ

Does the Mamiya 45mm f/2.8 AF work with Phase One digital backs?
Yes. The lens is compatible with both Mamiya 645AF film bodies and Phase One 645-mount digital backs, so you can use it across film and digital systems on the same platform.
What autofocus system does this lens use?
The lens has integrated autofocus for the Mamiya 645AF mount. It operates within the native AF system of compatible 645AF bodies.
What filter size does the 45mm f/2.8 AF use?
67mm. That means you can use existing 67mm polarizers, NDs, and other filters without purchasing new glass.
Is this lens weather-sealed?
The verified specifications don't include weather-sealing information, so check the original product documentation or condition notes if that's a requirement for your work.
How does the 45mm focal length perform for environmental portraiture or architectural work?
At 45mm on the 645 frame, you get a genuinely wide perspective suited to work where you need to include environment alongside subject. The f/2.8 aperture provides meaningful subject separation at medium format scale.
Can I use this lens on Mamiya 645 bodies without autofocus?
No. This is an AF-mount lens designed specifically for Mamiya 645AF bodies and Phase One 645 digital backs. It is not compatible with older manual-focus 645 film bodies.
What's the minimum focusing distance?
The verified specifications don't include minimum focus distance. Check the original product manual or contact the manufacturer for that detail.
SpecificationValue
Focal Length45mm
Max Aperturef/2.8
MountMamiya 645 AF
Filter Thread67mm

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 67mm
Focus Type Autofocus (camera motor)
Lens Mount Mamiya 645AF & Phase One
Lens Type Wide-Angle
Max Focal Length 45mm
Min Focal Length 45mm