Mamiya 645 80mm f/1.9 Sekor C Lens
The Mamiya 80mm f/1.9 is a 80mm f/1.9 lens designed for Mamiya 645 mount cameras. Used copies start from $225 on GearFocus, with buyer protection on every purchase.
Mamiya 645 80mm f/1.9 Sekor C Lens
Used Mamiya 80mm f/1.9 Listings on GearFocus
Lens Overview — Mamiya 80mm f/1.9
Key Features — Mamiya 80mm f/1.9
f/1.9 Maximum Aperture: Exceptionally fast for a medium format prime, allowing handheld shooting in lower light and precise subject separation with shallow depth of field.
80mm Standard Focal Length: Equivalent to a short telephoto perspective on medium format, making it well-suited to portrait, editorial, and studio work.
Medium Format Image Circle: Designed to cover the 645 format's larger negative area, delivering edge-to-edge sharpness across the full frame.
Manual Focus Only: Smooth manual focus ring supports the precise, deliberate shooting style that medium format workflows typically require.
Mamiya 645 Mount: Purpose-built for the Mamiya 645 system, ensuring full native compatibility with Mamiya 645 film and digital backs.
67mm Filter Thread: Standard 67mm front thread makes it straightforward to use widely available filters for polarizing, ND, or creative effects.
Lens Specifications — Mamiya 80mm f/1.9
| Spec | Detail |
|---|---|
| Use Cases | Portrait, Studio, Product |
| Lens Type | Prime |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 80mm |
| Maximum Aperture | f/1.9 |
| Camera System | Medium Format |
| Lens Mount | Mamiya 645 |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 67mm |
Description — Mamiya 80mm f/1.9
The Mamiya 645 80mm f/1.9 Sekor C is a prime lens designed exclusively for the Mamiya 645 mount system, operating in the medium format lens category. Its standout specification is the f/1.9 maximum aperture, which is notably fast for a medium format standard prime and opens up possibilities for available-light photography and selective focus work. The 80mm focal length places it in the standard range for the format, making it practical for portraits, editorial sessions, and studio use.
Focus is manual only, with no autofocus mechanism, which fits naturally into the measured pace of medium format shooting. The lens features a 67mm filter thread, keeping it compatible with a wide range of common filter accessories. Weighing in at 570g, it has the heft expected of medium format glass while remaining practical for extended use.
There is no image stabilization, so solid technique matters. For Mamiya 645 system shooters looking for a fast, standard prime with full manual control, this lens covers that role directly.
Pros — Mamiya 80mm f/1.9
- ✓Fast f/1.9 maximum aperture for a medium format prime, enabling shooting in lower light and with shallow depth of field
- ✓80mm standard focal length is well-suited to portrait and general-purpose medium format shooting
- ✓67mm filter thread size makes filter accessories straightforward to source and use
Cons — Mamiya 80mm f/1.9
- ✗Manual focus only — no autofocus option for shooters who need faster acquisition
- ✗No image stabilization, requiring careful technique especially at wider apertures
- ✗570g weight adds up during extended handheld sessions
Frequently Asked Questions — Mamiya 80mm f/1.9
What camera system is this lens compatible with?+
This lens is built for the Mamiya 645 mount, making it compatible with Mamiya 645 system cameras. It is not natively compatible with other camera systems.
Does this lens support autofocus?+
No, the Mamiya 645 80mm f/1.9 Sekor C is a manual focus lens. Shooters will need to focus by hand, which is typical for lenses of this era designed for the Mamiya 645 system.
What filter size does this lens use?+
The lens has a 67mm filter thread, so standard 67mm filters for polarizers, ND filters, or UV protection will fit directly on the front element.
How heavy is this lens?+
The lens weighs 570g, which is consistent with medium format prime glass. It is manageable for handheld use but worth accounting for when pairing with a Mamiya 645 body.
Does this lens have image stabilization?+
No, this lens has no image stabilization. Shooters should use appropriate shutter speeds or a tripod to manage camera shake, particularly when shooting at the f/1.9 maximum aperture.