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Mamiya Sekor C 645 80mm f/2.8 N Lens

The Mamiya 645 80mm f/2.8 N is a 80mm f/2.8 lens designed for Mamiya 645 mount cameras. Used copies start from $234.64 on GearFocus, with buyer protection on every purchase.

Mamiya Sekor C 645 80mm f/2.8 N Lens

Mamiya Sekor C 645 80mm f/2.8 N Lens

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Mamiya 645 80mm f2.8 Sekor C N Lens
Mamiya 645 80mm f2.8 Sekor C N Lens

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Lens OverviewMamiya 645 80mm f/2.8 N

The Mamiya Sekor C 645 80mm f/2.8 N is a manual focus prime lens built for the Mamiya 645 camera system. Designed specifically for medium format photography, it offers a standard focal length of 80mm and a maximum aperture of f/2.8, making it a well-rounded option for photographers who want both reach and light-gathering capability in a single, dedicated optic. The lens mounts exclusively via the Mamiya 645 mount, ensuring a native fit with compatible bodies in that system.

At 310g, it sits in a relatively manageable weight class for a medium format prime, which can be a practical consideration when shooting handheld or working in the studio for extended sessions. The 58mm filter thread gives photographers a common filter size to work with for polarizers, ND filters, and other accessories. As a manual focus lens, it demands deliberate, hands-on control over focus, which suits methodical shooting workflows such as studio portraiture, still life, and controlled environment work.

There is no image stabilization, so users will need to account for shutter speed and support accordingly. Overall, this lens represents a straightforward, capable standard prime for the Mamiya 645 system.

Key FeaturesMamiya 645 80mm f/2.8 N

80mm Standard Prime: Equivalent to a standard field of view on the medium format 645 system, making it versatile for portraiture, travel, and general photography.

f/2.8 Maximum Aperture: Allows for solid light gathering and subject separation in a medium format context, where depth of field is naturally shallower than smaller formats.

Mamiya 645 Mount: Native mount ensures direct, proper fit with Mamiya 645 bodies including the M645, 645 Pro, and 645 Super.

Medium Format Coverage: Designed to cover the 645 medium format frame, delivering the characteristic detail and tonal rendering associated with larger film or sensor formats.

Manual Focus Design: Hands-on focus control suits deliberate shooting workflows such as studio portraiture, still life, and landscape photography.

310g Compact Weight: Relatively light for a medium format prime, making extended handheld or studio sessions more comfortable.

Lens SpecificationsMamiya 645 80mm f/2.8 N

Mamiya 645 80mm f/2.8 N full specifications
SpecDetail
Use CasesPortrait, Studio, Product
Lens TypePrime
FormatMedium Format
Zoom/PrimePrime
Focal Length80mm
Maximum Aperturef/2.8
Camera SystemMedium Format
Lens MountMamiya 645
AutofocusNo
Focus TypeManual
Image StabilizationNone
Filter Thread58mm

DescriptionMamiya 645 80mm f/2.8 N

The Mamiya Sekor C 645 80mm f/2.8 N is a prime lens built for the Mamiya 645 camera system, operating in the medium format space. With a maximum aperture of f/2.8 and a focal length of 80mm, it covers the standard focal length range and offers a useful degree of light-gathering performance. The lens is manual focus only, putting full control of focus in the photographer's hands — a workflow that pairs naturally with methodical studio and controlled-environment shooting.

Weighing in at 310g, it is a practical option for a medium format prime, avoiding the bulk that some longer or faster lenses in this format carry. The 58mm filter thread opens up a broad range of compatible filter accessories. There is no image stabilization, so technique and support equipment become important factors when shooting at lower shutter speeds.

With its native Mamiya 645 mount, this lens fits directly onto compatible bodies without adapters or compromises.

ProsMamiya 645 80mm f/2.8 N

  • Maximum aperture of f/2.8 provides solid light-gathering capability for a medium format prime
  • 80mm focal length sits in the standard range, making it versatile across multiple shooting scenarios
  • Compact weight of 310g is manageable for a medium format lens

ConsMamiya 645 80mm f/2.8 N

  • Manual focus only — no autofocus support, requiring deliberate technique and practice
  • No image stabilization, which places greater demands on shooting technique or support equipment
  • Mamiya 645 mount limits compatibility to that specific camera system without adaptation

ReviewsMamiya 645 80mm f/2.8 N

VideosMamiya 645 80mm f/2.8 N

Mamiya 645 Review - Shooting with the CameraWillem Verbeeck

Resources & DownloadsMamiya 645 80mm f/2.8 N

Manuals & Guides

Frequently Asked QuestionsMamiya 645 80mm f/2.8 N

What camera system is this lens compatible with?+
The Mamiya Sekor C 645 80mm f/2.8 N is designed for the Mamiya 645 mount. It is built specifically for that system and will mount natively on compatible Mamiya 645 bodies.
Does this lens support autofocus?+
No, this lens is manual focus only. Photographers need to adjust focus by hand, which suits deliberate, controlled shooting environments.
What filter size does this lens use?+
The lens features a 58mm filter thread, which is a common size that makes it straightforward to find compatible filters such as polarizers or ND filters.
How heavy is this lens?+
The lens weighs 310g, which is relatively light for a medium format prime and makes it practical for extended handheld or studio use.
Does this lens have image stabilization?+
No, the Mamiya Sekor C 645 80mm f/2.8 N has no image stabilization. Users should factor this into their shutter speed and support choices when shooting.

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