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Mamiya Sekor C 55-110mm f/4.5 N Manual Focus Lens for 645 {67}

Model #292305
  • $270.00

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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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With Caps
$270.00
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Mamiya Sekor C 55-110mm f/4.5 N, the native zoom built for 645 film.

The 55-110mm focal range gives Mamiya 645 shooters practical coverage in a single lens, running from moderate wide-angle into short telephoto territory without swapping glass. The f/4.5 maximum aperture keeps exposure options open in mixed light. A 67mm filter thread means standard circular polarizers and ND filters drop straight in without adapters or step rings.

Manual focus on medium format is not a limitation, it is a working method. With a ground glass finder and the 645's deliberate shooting pace, manual control over focus placement is a natural fit. This lens integrates with that workflow without friction.

For anyone building or working within a Mamiya 645 system, this is the zoom that covers the most-used focal range without reaching for a bag full of primes. At the price points these trade for on the used market, the value relative to the format is straightforward.

Who It's For

Studio and location portrait photographers using the Mamiya 645 system get a lens that covers the classic flattering focal lengths, from 55mm for environmental context to 110mm for tighter headshots, without swapping mounts. Analog landscape shooters benefit from the 67mm filter thread, which accepts common graduated ND and polarizer sizes directly. Documentary and travel photographers working on medium format film will find the zoom range reduces the number of lens changes in variable shooting conditions. Anyone scanning 645 negatives for high-resolution digital output gets the full benefit of medium format optical quality from a native, purpose-built zoom.

Key Features

  • Mamiya 645 mount, native zoom lens for 645 system
  • 55-110mm focal range covers moderate wide-angle to short telephoto
  • f/4.5 maximum aperture
  • 67mm filter thread for standard accessories
  • Manual focus operation
  • Integrates with deliberate medium-format workflow

FAQ

What mount does this lens use?
Mamiya 645. It integrates directly into the 645 system without adapters.
Is manual focus a practical workflow on medium format?
Yes. Medium format's deliberate pace and ground glass finder make manual focus a natural working method, not a workaround. Focus placement control sits at the center of how these cameras operate.
What filter size does this lens take?
67mm. Standard circular polarizers and ND filters thread directly onto the lens without step rings or adapters.
Does the 55-110mm range cover typical shooting scenarios?
It covers moderate wide-angle through short telephoto in one lens, eliminating the need to swap glass for most general work. For specialized focal lengths outside this span, you'd reach for dedicated primes.
How does manual focus handling compare to autofocus lenses?
On a Mamiya 645, manual focus is direct and tactile. The rangefinder patch or split-screen in the ground glass gives clear focus confirmation without electronic delay or hunting.
What is the maximum aperture?
f/4.5. This keeps exposure flexibility in mixed and lower light without requiring extreme ISO or longer shutter speeds.
SpecificationValue
Focal Length55-110mm
Max Aperturef/4.5
MountMamiya 645

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 Manual focus (only)
Lens Mount Mamiya M645
Lens Type Wide-Angle, Standard / Normal
Max Focal Length 110mm
Min Focal Length 55mm