Skip to product overview

Mamiya 127mm f/3.8 Sekor C Lens

The Mamiya 127mm f/3.8 is a 127mm f/3.8 lens designed for Mamiya 645 mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Mamiya 127mm f/3.8 Sekor C Lens

Mamiya 127mm f/3.8 Sekor C Lens

Get notified when one lists.

We'll text or email you the moment a Mamiya 127mm f/3.8 is listed on GearFocus.

Have a Mamiya 127mm f/3.8 sitting in your bag?

You'd be the first listing for this model.
Serious buyers are already watching — list yours in minutes.

Sell your Mamiya 127mm f/3.8 on GearFocus

Lens Overview — Mamiya 127mm f/3.8

The Mamiya 127mm f/3.8 Sekor C is a prime lens built for the Mamiya 645 medium format system. With a fixed focal length of 127mm and a maximum aperture of f/3.8, this manual focus lens sits comfortably in the standard-to-short-telephoto range for medium format shooting, making it a natural choice for portrait work and controlled studio environments where precise, deliberate focusing is part of the workflow. As a prime lens, it offers a fixed perspective that encourages thoughtful composition rather than casual zooming, a quality that many medium format shooters actively prefer.

The Mamiya 645 mount ensures direct, native compatibility with Mamiya 645 system camera bodies, meaning there are no adapters required and the lens couples mechanically as intended. Focus is entirely manual, which suits the measured pace of medium format photography well — whether you are working on a tripod in a studio or composing carefully in the field. The lens carries no image stabilization, which is consistent with the manual, tripod-friendly shooting style typical of medium format prime lenses.

For photographers already invested in the Mamiya 645 ecosystem, the Sekor C 127mm f/3.8 represents a straightforward, dedicated optic for this versatile system.

Key Features — Mamiya 127mm f/3.8

127mm Prime Focal Length: Sits in the standard-to-short-telephoto range on Mamiya 645 bodies, making it a natural fit for portraits and controlled studio work.

f/3.8 Maximum Aperture: Provides meaningful subject-to-background separation, a notable advantage when shooting on a medium format sensor.

Mamiya 645 Native Mount: Designed specifically for the Mamiya 645 system, offering direct mechanical coupling with compatible bodies and no adapters required.

Manual Focus Design: Fully manual focusing suits the deliberate, measured pace of medium format photography, whether on a tripod or in the field.

Medium Format Coverage: Image circle is designed to cover the 645 format frame, taking full advantage of the larger negative or sensor area.

Sekor C Optical Design: Part of Mamiya's Sekor C lens line, built to deliver consistent sharpness and rendering across the 645 system lineup.

Lens Specifications — Mamiya 127mm f/3.8

Mamiya 127mm f/3.8 full specifications
SpecDetail
Use CasesPortrait, Product, Studio
Lens TypePrime
FormatMedium Format
Zoom/PrimePrime
Focal Length127mm
Maximum Aperturef/3.8
Camera SystemMedium Format
Lens MountMamiya 645
AutofocusNo
Focus TypeManual Focus
Image StabilizationNone

Description — Mamiya 127mm f/3.8

The Mamiya 127mm f/3.8 Sekor C is a prime lens designed exclusively for the Mamiya 645 mount system, placing it firmly within the medium format camera ecosystem. Its fixed 127mm focal length and f/3.8 maximum aperture make it a capable choice for photographers who value a measured, manual approach to image-making. As a manual focus lens with no image stabilization, it is best paired with a stable shooting platform, rewarding the kind of deliberate, tripod-assisted technique that medium format photography naturally encourages.

The Mamiya 645 mount provides native, adapter-free compatibility with Mamiya 645 system bodies, ensuring reliable mechanical coupling. Whether used in a studio setting or for carefully composed location work, this medium format prime offers a straightforward optical tool for Mamiya 645 system users seeking a dedicated lens at this focal length.

Pros — Mamiya 127mm f/3.8

  • ✓Native Mamiya 645 mount ensures direct compatibility with Mamiya 645 system bodies
  • ✓127mm focal length provides a standard-to-short-telephoto perspective well-suited to controlled shooting scenarios
  • ✓Maximum aperture of f/3.8 offers meaningful background separation for a medium format prime

Cons — Mamiya 127mm f/3.8

  • ✗Manual focus only — no autofocus capability for fast-moving or spontaneous shooting
  • ✗No image stabilization, making a tripod or stable support advisable in lower light
  • ✗Compatibility is limited to the Mamiya 645 mount system

Videos — Mamiya 127mm f/3.8

Mamiya RB67 Pro SD - Long Term Review — Kyle McDougall

Resources & Downloads — Mamiya 127mm f/3.8

Manuals & Guides

Frequently Asked Questions — Mamiya 127mm f/3.8

Which camera bodies is this lens compatible with?+
The Mamiya 127mm f/3.8 Sekor C is designed for the Mamiya 645 mount system. It is intended for use with Mamiya 645 camera bodies and does not require an adapter when used with compatible cameras in that system.
Does this lens support autofocus?+
No, this lens is manual focus only. It does not offer any autofocus functionality, so focusing must be performed by hand. This is a common characteristic of lenses designed for medium format systems of this era.
Does the lens have image stabilization?+
No, the specifications confirm that image stabilization is not present on this lens. Shooters are advised to use a tripod or other stable support, particularly in lower-light conditions.
What is the maximum aperture of this lens?+
The maximum aperture is f/3.8. This provides a degree of background separation and light-gathering capability that is useful for portrait and studio work with the Mamiya 645 system.
Is this lens a zoom or a prime?+
This is a prime lens with a fixed focal length of 127mm. It does not zoom, offering a single, fixed perspective that suits deliberate, composed shooting styles.

Similar to Mamiya 127mm f/3.8

Loading similar products...