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Mamiya 500mm f/8 Sekor C Lens for RB67 {105}

Model #235365
  • $559.00

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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.
EX Excellent
With Caps, Case, Hood, Lens Holder, Filter
$559.00
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Mamiya 500mm f/8 Sekor C: medium format reach for RB67 shooters.

A 500mm lens designed for the RB67 system is a specialized tool, and Mamiya built this one to extend the system's reach well beyond typical portrait and landscape focal lengths. At f/8, it's a fixed maximum aperture, so working with a tripod and deliberate technique is part of the deal. That's not a limitation for the photographers who gravitate toward this glass, it's the expected workflow.

The RB67's 6x7cm format produces negatives with substantially more film area than 35mm, which means a 500mm focal length here renders subject isolation and background compression differently than the same number printed on a 35mm-mount lens. Shooting wildlife from a fixed position, or picking out distant architectural details, this lens rewards patience. The Sekor C designation places it within Mamiya's professional RB67 lens family, built to the same optical and mechanical standards as the rest of that system's lineup.

Who It's For

Wildlife photographers who already shoot the RB67 and want reach without abandoning medium format quality will find this lens fits naturally into a tripod-based field setup. Documentary and nature photographers drawn to deliberate, large-format-adjacent workflows benefit from the f/8 Sekor C's focal length when working from a fixed position. Film photographers who scan or darkroom-print their 6x7 negatives get the full advantage of the format's negative size at telephoto distances. Studio or location photographers needing a long lens that stays within the RB67 mount ecosystem round out the likely users.

Key Features

  • 500mm focal length for RB67 medium-format system
  • f/8 fixed maximum aperture
  • Mamiya Sekor C professional lens designation
  • Manual focus operation
  • Designed for 6x7cm negative format
  • Precision optics matching RB67 system standards

FAQ

What mount does this 500mm use?
Mamiya RB67. It's part of Mamiya's professional Sekor C lens lineup for that system.
Is f/8 a dealbreaker for fast film work?
Depends on your workflow. You're shooting medium format on a tripod anyway - f/8 is the aperture Mamiya spec'd for this focal length. Tripod and deliberate technique are the expectation, not a compromise.
How does 500mm perform on the RB67's 6x7 frame?
The RB67 shoots 6x7cm negatives, which are substantially larger than 35mm. A 500mm focal length here delivers the reach and compression you'd expect from that number in medium format - that's the whole point of this lens.
Can I use this for wildlife or distant subjects?
Yes. This lens exists for exactly that purpose - extending the RB67's reach for wildlife from a fixed position, architectural detail work, or any situation where you need long focal length on a large-format negative.
Is this a modern autofocus lens?
No. It's a manual-focus Sekor C lens built to match the mechanical and optical standards of the RB67 system. Manual focus is part of the medium-format workflow with this camera.
What's the difference between Sekor C and earlier Sekor designations?
Sekor C is Mamiya's professional RB67 lens family - it carries the same optical and mechanical build standards as the rest of that lineup.
SpecificationValue
Focal Length500mm
Max Aperturef/8
MountMamiya RB67

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
Focus Type Manual focus (only)
Lens Mount Mamiya RB
Lens Type Telephoto / Long
Max Focal Length 500mm
Min Focal Length 500mm