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Mamiya TLR 55mm f/4.5 Sekor Lens

The Mamiya 55mm f/4.5 is a lens from Mamiya. Check GearFocus for current availability, with buyer protection on every purchase.

Mamiya TLR 55mm f/4.5 Sekor Lens

Mamiya TLR 55mm f/4.5 Sekor Lens

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Lens Overview — Mamiya 55mm f/4.5

The Mamiya TLR 55mm f/4.5 Sekor Lens is a vintage medium format optic manufactured during the 1960s, designed specifically for Mamiya's twin-lens reflex camera system. Mounted via the Mamiya TLR lens mount, this lens is part of the interchangeable lens lineup for Mamiya TLR cameras — a feature that set the Mamiya TLR system apart from many of its contemporaries. The lens is built for use with Medium Format 120 film, offering the expansive negative size and tonal rendering that medium format shooters prize.

Focusing is entirely manual, in keeping with the era of its manufacture, and the lens incorporates a leaf shutter mechanism — a design that enables flash sync across the shutter's full speed range, a practical advantage for studio and location work with flash. The lens weighs between 400g and 450g, giving it a solid, well-constructed feel in hand. For photographers drawn to vintage medium format systems, this Sekor lens represents an authentic piece of 1960s optical craftsmanship, compatible with the Mamiya TLR interchangeable lens mount system.

Key Features — Mamiya 55mm f/4.5

Wide-Angle TLR Coverage: At 55mm on medium format 120 film, this lens provides a wider field of view than a standard 80mm, useful for environmental portraits and architecture.

Interchangeable TLR Mount: Fits the Mamiya TLR system's interchangeable lens mount, a rare capability that distinguished Mamiya TLRs from fixed-lens competitors like Rolleiflex.

Medium Format 120 Film: Designed for 120 film, delivering the large negative area and tonal gradation that medium format shooters prize over 35mm.

Leaf Shutter Design: Built-in leaf shutter allows flash synchronization at all shutter speeds, making it practical for studio strobes and location flash work.

Manual Focus Operation: Fully manual focus requires deliberate, hands-on technique well suited to the measured pace of medium format shooting.

1960s Optical Construction: Manufactured during the 1960s, the lens reflects period-correct build quality and coating technology characteristic of that era of medium format optics.

Lens Specifications — Mamiya 55mm f/4.5

Mamiya 55mm f/4.5 full specifications
SpecDetail
Use CasesPortrait, Studio, Creative Effects
Lens MountMamiya TLR
Focus TypeManual Focus

Description — Mamiya 55mm f/4.5

The Mamiya TLR 55mm f/4.5 Sekor Lens is a vintage medium format optic produced during the 1960s, built for use on Mamiya TLR cameras via the dedicated Mamiya TLR lens mount. Designed for Medium Format 120 film, it slots into the interchangeable lens system that made Mamiya's TLR lineup particularly versatile among medium format shooters of its era. The lens operates with manual focus and is equipped with a leaf shutter, a design that provides reliable flash synchronization capability — a genuine advantage for photographers working with strobes or flash units.

Weighing between 400g and 450g, the lens has the substantial, solid feel expected of professional medium format glass from this period. With a maximum aperture of f/4.5, it is well-suited to controlled lighting environments. For collectors and working film photographers seeking authentic 1960s Mamiya TLR glass, this Sekor lens offers a direct connection to medium format photographic tradition.

Pros — Mamiya 55mm f/4.5

  • ✓Mamiya TLR interchangeable mount — works with Mamiya TLR camera bodies as part of the interchangeable lens system
  • ✓Medium Format 120 film compatibility — delivers the large negative area characteristic of the medium format system
  • ✓Leaf shutter design — enables full-range flash synchronization, practical for studio and on-location flash photography

Cons — Mamiya 55mm f/4.5

  • ✗Manual focus only — no autofocus capability, which requires more deliberate shooting technique
  • ✗Mamiya TLR-specific mount — not compatible with other camera systems without adaptation
  • ✗Aperture of f/4.5 — a relatively modest maximum aperture compared to faster medium format alternatives

Videos — Mamiya 55mm f/4.5

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Resources & Downloads — Mamiya 55mm f/4.5

Manuals & Guides

Frequently Asked Questions — Mamiya 55mm f/4.5

Which cameras is this lens compatible with?+
This lens is designed for Mamiya TLR cameras and uses the Mamiya TLR lens mount. It is part of the interchangeable lens system for Mamiya TLR bodies. It is not compatible with other camera systems without a dedicated adapter.
What film format does this lens support?+
The lens is designed for Medium Format 120 film, as used in Mamiya TLR cameras. It is not intended for 35mm or other film formats.
Does this lens have a built-in shutter?+
Yes, the lens features a leaf shutter mechanism, which is integrated into the lens itself. This is a common design for medium format TLR and interchangeable lens systems of this era.
How heavy is this lens?+
The lens weighs between 400g and 450g. This is a moderate weight typical of medium format glass from this period.
When was this lens manufactured?+
The Mamiya TLR 55mm f/4.5 Sekor Lens was manufactured during the 1960s, making it a vintage lens. Buyers should account for potential age-related wear when evaluating individual examples.
Is this lens autofocus?+
No, this is a manual focus lens. All focusing must be done by hand, which is consistent with the design and era of the Mamiya TLR system.

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