Mamiya RB67 150mm f/4 Soft Focus C Lens
The Mamiya 150mm f/4 Soft Focus C is a 150mm f/4 lens designed for Mamiya RB mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Mamiya RB67 150mm f/4 Soft Focus C Lens
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Lens Overview — Mamiya 150mm f/4 Soft Focus C
Key Features — Mamiya 150mm f/4 Soft Focus C
Optical Soft Focus Design: Produces soft focus rendering in-camera through optical means, rather than relying on post-processing filters or diffusion attachments.
Adjustable Soft Focus Effect: Features a dedicated soft focus control ring that lets photographers dial in the degree of diffusion independently of the aperture setting.
150mm Prime Focal Length: A standard medium format focal length well-suited to portrait and editorial work at natural shooting distances on the RB67.
Mamiya RB Mount: Native RB mount compatibility ensures full mechanical integration with the Mamiya RB67 system, including the rotating back.
f/4 Maximum Aperture: Provides usable light transmission for a specialized soft focus lens, supporting studio and controlled-lighting environments.
Manual Focus Only: Fully manual focus operation suits the deliberate, tripod-based shooting style typical of RB67 studio work.
Lens Specifications — Mamiya 150mm f/4 Soft Focus C
| Spec | Detail |
|---|---|
| Use Cases | Portrait, Creative Effects, Studio |
| Lens Type | Special Effect |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 150mm |
| Maximum Aperture | f/4 |
| Camera System | Medium Format |
| Lens Mount | Mamiya RB |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 77mm |
Description — Mamiya 150mm f/4 Soft Focus C
The Mamiya 150mm f/4 Soft Focus C Lens is a Special Effect prime designed exclusively for the Mamiya RB mount, making it a native fit for the RB67 system. With a fixed focal length of 150mm and a maximum aperture of f/4, it occupies the standard focal length range in medium format terms — a range frequently favored for portrait and creative editorial work. The lens is manual focus only, which suits the measured, tripod-based shooting style the RB67 system is known for.
Its 77mm filter thread offers broad compatibility with widely available circular filters. Tipping the scales at 850g, this is a substantial lens befitting the medium format category. As a purpose-built Special Effect lens within the medium format ecosystem, it provides an optical approach to soft focus rendering that is distinct from post-processing techniques — delivering results at the moment of capture rather than in editing.
For RB67 users seeking creative differentiation in their work, this lens represents a dedicated, in-camera tool for that aesthetic.
Pros — Mamiya 150mm f/4 Soft Focus C
- ✓Purpose-built for the Mamiya RB mount — guaranteed native compatibility with the RB67 system
- ✓150mm focal length sits in the standard range for medium format, well-suited to portrait-distance work
- ✓Maximum aperture of f/4 provides usable light transmission for a specialized soft focus design
Cons — Mamiya 150mm f/4 Soft Focus C
- ✗No autofocus capability — manual focus only, which may slow shooting pace in fast-moving situations
- ✗At 850g, this is a hefty lens that adds considerable weight to an already substantial camera system
- ✗No image stabilization, though this is standard for manual medium format glass
Videos — Mamiya 150mm f/4 Soft Focus C
THE BEST MAMIYA RB67 LENS!!! — Brooks Witta