Mamiya 150mm f/2.8 Sekor D Lens
The Mamiya 150mm f/2.8 is a 150mm f/2.8 lens designed for Mamiya 645 mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Mamiya 150mm f/2.8 Sekor D Lens
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Lens Overview — Mamiya 150mm f/2.8
Key Features — Mamiya 150mm f/2.8
150mm f/2.8 Prime: A fixed telephoto focal length with a fast maximum aperture, well-suited for portraits and controlled studio work where subject isolation matters.
Medium Format Depth of Field: The f/2.8 aperture on a medium format system produces shallower depth of field than equivalent apertures on smaller formats, giving pronounced background separation.
Mamiya 645 Mount: Native compatibility with the Mamiya 645 camera system, including digital backs and film bodies built around this mount.
Autofocus and Manual Focus: Supports both AF and MF operation, giving photographers flexibility across different shooting scenarios and workflows.
77mm Filter Thread: Standard 77mm front thread accepts a wide range of widely available filters for polarizing, ND, or protective use.
Substantial Build Weight: A substantial lens typical of medium format telephoto optics — tripod or sturdy grip support is recommended for extended use.
Lens Specifications — Mamiya 150mm f/2.8
| Spec | Detail |
|---|---|
| Use Cases | Portrait, Studio, Product |
| Lens Type | Prime |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 150mm |
| Maximum Aperture | f/2.8 |
| Camera System | Medium Format |
| Lens Mount | Mamiya 645 |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | None |
| Filter Thread | 77mm |
Description — Mamiya 150mm f/2.8
The Mamiya 150mm f/2.8 Sekor D is a medium format prime lens built around the Mamiya 645 mount, designed for photographers who need a capable telephoto option in that system. The fixed 150mm focal length places this lens firmly in telephoto territory, making it well-suited to scenarios where subject-to-camera distance and selective focus are priorities. A maximum aperture of f/2.8 provides meaningful control over depth of field and allows for shooting in lower ambient light conditions.
The lens supports both autofocus and manual focus, giving users the flexibility to adapt to different shooting environments and preferences. Physically, the Sekor D 150mm is a weighty optic at 1,180g, reflecting its medium format optical construction — shooters should plan accordingly with appropriate support. A 77mm filter thread makes it straightforward to pair with standard-sized filters.
Notably, the lens has no image stabilization, so technique and stability are important considerations at this focal length.
Pros — Mamiya 150mm f/2.8
- ✓Fast f/2.8 maximum aperture for a medium format telephoto prime, enabling meaningful depth-of-field control
- ✓Supports both autofocus and manual focus (focusType: Auto, Manual), offering flexible operation
- ✓77mm filter thread size accommodates a wide range of widely available standard filters
Cons — Mamiya 150mm f/2.8
- ✗No image stabilization (imageStabilization: None), which at 150mm and 1,180g demands careful shooting technique or mechanical support
- ✗Weight of 1,180g is considerable and may require additional support gear for extended handheld use
- ✗Mamiya 645 mount is a proprietary system, limiting use to that specific camera ecosystem