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Mamiya Sekor Z 127mm f/3.8 Lens for RZ67 System {77}

Model #235658
  • $150.00

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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.
UG Ugly
$150.00
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Mamiya's standard portrait focal length for the RZ67 system.

The Sekor Z 127mm f/3.8 sits at the heart of the RZ67 lens lineup as the system's go-to normal-to-short-telephoto option on 6x7 medium format. At f/3.8, it offers enough working aperture to separate a subject from its background on the large 6x7 negative, where the shallower depth of field inherent to the format does much of the optical heavy lifting. The 77mm filter thread is a practical detail that aligns with common filter sets.

The RZ67 system itself is a studio and location workhorse built around rotating backs and bellows focusing, and this lens integrates fully with that architecture. For photographers already invested in the RZ67 platform, the 127mm is the focal length that earns permanent residence on the camera body. Buying into this lens on the used market means getting a proven medium format tool at a fraction of what new medium format glass commands today.

Who It's For

Portrait photographers working with the RZ67 in studio will find the 127mm a natural fit, giving subject-flattering perspective on the 6x7 frame with f/3.8 available when backgrounds need to fall away. Film photographers shooting large-format-quality negatives on location benefit from a focal length that handles environmental portraiture and tight editorial framing without excessive working distance. Collectors and hybrid film/digital shooters building out an RZ67 kit treat this lens as an essential system piece, not an optional addition.

Key Features

  • 127mm focal length optimized for portraiture on 6x7 format
  • f/3.8 maximum aperture for subject separation
  • 77mm filter thread aligns with RZ67 lens ecosystem
  • Mamiya RZ bayonet mount integrates with rotating backs
  • Bellows-focusing design matches RZ67 system architecture
  • Proven studio and location medium format tool

FAQ

What aperture does the Sekor Z 127mm offer?
f/3.8 maximum aperture, which provides enough working depth of field control on 6x7 negatives to separate subjects from background without requiring stopped-down shooting in studio conditions.
What filter size do I need for this lens?
77mm. This thread size is standard across much of the RZ67 lens lineup, so filters stack efficiently across multiple focal lengths.
Is this lens compatible with all RZ67 bodies?
Yes. The Sekor Z 127mm mounts via the Mamiya RZ bayonet and integrates with the RZ67's rotating back and bellows-focusing architecture.
What makes 127mm the portrait focal length for RZ67?
On 6x7 format, 127mm sits between true normal and short telephoto, offering flattering perspective compression for headshots and half-body work while maintaining enough working distance in studio setups.
Can I use this lens with the newer RB67 system?
No. This is a Mamiya RZ mount lens only. RB67 bodies use a different bayonet and require RB-mount glass.
What's the typical price range for a used Sekor Z 127mm?
Used examples typically cost a fraction of new medium format telephoto glass, making it an accessible entry point into RZ67 system ownership for photographers who already have a body.
SpecificationValue
Focal Length127mm
Max Aperturef/3.8
MountMamiya RZ
Filter Thread77mm

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 77mm
Focus Type Manual focus (only)
Lens Mount Mamiya RZ
Lens Type Telephoto / Long
Max Focal Length 127mm
Min Focal Length 127mm