Mamiya RZ67 37mm f/4.5 W Sekor Z Fisheye Lens
The Mamiya 37mm f/4.5 W is a 37mm f/4.5 lens designed for Mamiya RZ mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Mamiya RZ67 37mm f/4.5 W Sekor Z Fisheye Lens
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Lens Overview — Mamiya 37mm f/4.5 W
Key Features — Mamiya 37mm f/4.5 W
37mm Fisheye Prime: Fixed focal length delivers a consistent, dramatic fisheye perspective with no zoom compromise.
Medium Format Coverage: Designed to cover the larger image circle of medium format, producing expansive fisheye images with greater detail than 35mm equivalents.
Mamiya RZ67 Mount: Native fit for the Mamiya RZ67 system ensures full mechanical compatibility with no adapters required.
f/4.5 Maximum Aperture: Provides workable light-gathering capability for a fisheye lens of this size and format.
Manual Focus Operation: Fully manual focus design gives photographers direct, tactile control over focus distance, standard for this type of specialized lens.
No Filter Thread: The pronounced curved front element makes standard screw-on filters incompatible, as is typical for fisheye lens designs.
Lens Specifications — Mamiya 37mm f/4.5 W
| Spec | Detail |
|---|---|
| Use Cases | Landscape, Architecture, Creative Effects |
| Lens Type | Fisheye |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 37mm |
| Maximum Aperture | f/4.5 |
| Camera System | Medium Format |
| Lens Mount | Mamiya RZ |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Weight | 1200g |
Description — Mamiya 37mm f/4.5 W
The Mamiya 37mm f/4.5 W Sekor Z Fisheye is a prime fisheye lens designed exclusively for the Mamiya RZ mount system. Operating within the medium format camera ecosystem, this lens sits firmly in the wide-angle focal length range at a fixed 37mm, delivering a consistent fisheye perspective for creative and architectural work. Focus is entirely manual, placing direct control with the photographer — appropriate for the deliberate, considered pace that medium format shooting encourages.
The lens has a maximum aperture of f/4.5, which provides adequate light-gathering for this type of specialized optic. Weighing in at 1,200g, it is a robust and hefty piece of glass, consistent with the demands of medium format coverage. There is no image stabilization on board, and no filter thread is specified, which is typical of fisheye lens designs with deeply curved front elements.
For Mamiya RZ system photographers seeking to explore dramatic wide perspectives, this prime fisheye is a dedicated, system-native option.
Pros — Mamiya 37mm f/4.5 W
- ✓Dedicated medium format fisheye prime at a fixed 37mm focal length, purpose-built for the Mamiya RZ mount
- ✓Maximum aperture of f/4.5 provides functional light intake for a medium format fisheye design
- ✓Prime lens construction at 37mm ensures a consistent focal length without zoom compromise
Cons — Mamiya 37mm f/4.5 W
- ✗At 1,200g, this is a heavy lens that adds significant weight to an already substantial medium format system
- ✗Manual focus only with no autofocus capability, requiring more deliberate shooting technique
- ✗No image stabilization, which can challenge handheld shooting in lower light at f/4.5
Reviews — Mamiya 37mm f/4.5 W
Videos — Mamiya 37mm f/4.5 W
THE BEST MAMIYA RB67 LENS!!! — Brooks Witta