Mamiya 100mm f/2.8 Sekor Lens
The Mamiya 100mm f/2.8 is a 100mm f/2.8 lens designed for Mamiya 645 mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Mamiya 100mm f/2.8 Sekor Lens
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Lens Overview — Mamiya 100mm f/2.8
Key Features — Mamiya 100mm f/2.8
100mm f/2.8 Prime: A fixed focal length lens optimized for sharpness and consistency, with no zoom compromise.
Mamiya 645 Mount: Designed specifically for the Mamiya 645 medium format system, ensuring full mechanical compatibility with 645 bodies.
Medium Format Coverage: Image circle sized for the Mamiya 645 format, delivering the larger negative area and characteristic rendering that medium format is known for.
f/2.8 Maximum Aperture: Allows meaningful depth-of-field control and workable performance in lower ambient light without supplemental sources.
Portrait-Ready Focal Length: 100mm on the 645 format approximates a short telephoto perspective well suited to portraiture and studio work.
Manual Focus Only: Smooth manual focus ring standard for this era of medium format optics, suited to deliberate, controlled shooting workflows.
Lens Specifications — Mamiya 100mm f/2.8
| Spec | Detail |
|---|---|
| Use Cases | Portrait, Studio, Product |
| Lens Type | Prime |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 100mm |
| Maximum Aperture | f/2.8 |
| Camera System | Medium Format |
| Lens Mount | Mamiya 645 |
| Autofocus | No |
| Focus Type | Manual Focus |
| Image Stabilization | None |
| Filter Thread | 67mm |
Description — Mamiya 100mm f/2.8
The Mamiya 100mm f/2.8 Sekor is a prime lens designed for the Mamiya 645 medium format system. With a 100mm focal length sitting in the standard range and a maximum aperture of f/2.8, it gives medium format photographers a capable option for controlling depth of field and managing varied lighting conditions. The lens is manual focus only, consistent with the operating style of the Mamiya 645 platform, and carries no image stabilization.
At 500g, it is solid without being unwieldy. The 67mm filter thread means adding polarizers or other common filters is straightforward. This is a medium format optic designed for photographers already working within the Mamiya 645 ecosystem who want a dependable standard prime focal length.
Pros — Mamiya 100mm f/2.8
- ✓Maximum aperture of f/2.8 provides useful light-gathering capability for medium format shooting
- ✓Standard 100mm focal length is well-suited to portrait and studio work on the Mamiya 645 system
- ✓67mm filter thread size is widely compatible with common filter accessories
Cons — Mamiya 100mm f/2.8
- ✗Manual focus only — no autofocus support for the Mamiya 645 mount
- ✗No image stabilization, requiring steady technique or support for sharp results
- ✗Compatible exclusively with the Mamiya 645 mount, limiting use to that specific system
Videos — Mamiya 100mm f/2.8
Mamiya Universal | First Impressions — Robbie Maynard