Mamiya 645 145mm f/4 Sekor SF C Lens
The Mamiya 145mm f/4 is a 145mm f/4 lens designed for Mamiya 645 mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Mamiya 645 145mm f/4 Sekor SF C Lens
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Lens Overview — Mamiya 145mm f/4
Key Features — Mamiya 145mm f/4
Soft-Focus Effect Lens: The SF designation indicates a built-in soft-focus rendering capability, producing a distinctive ethereal quality well-suited to portrait and fine art work.
145mm Telephoto Prime: A single focal length optimized for portraits and subject isolation, providing comfortable working distance in a medium format shooting context.
Mamiya 645 Native Mount: Designed exclusively for the Mamiya 645 system, ensuring full native compatibility without adapters or compromises.
Manual Focus Operation: Full manual focus control encourages a deliberate, considered approach to sharpness placement — particularly relevant when dialing in soft-focus effects.
f/4 Maximum Aperture: Provides a consistent exposure baseline across the aperture range, giving predictable results in controlled lighting conditions.
Medium Format Coverage: Image circle designed to cover the 645 medium format negative, delivering the tonal depth and detail characteristic of the format.
Lens Specifications — Mamiya 145mm f/4
| Spec | Detail |
|---|---|
| Use Cases | Portrait, Studio, Creative Effects |
| Lens Type | Special Effect |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 145mm |
| Maximum Aperture | f/4 |
| Camera System | Medium Format |
| Lens Mount | Mamiya 645 |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 67mm |
Description — Mamiya 145mm f/4
The Mamiya 645 145mm f/4 Sekor SF C is a Special Effect prime lens built for the Mamiya 645 camera system. Operating at a fixed 145mm focal length in the telephoto range, it pairs with a f/4 maximum aperture and is designed for manual focus operation exclusively. The SF designation places this lens in a distinct category within the medium format lineup, separate from conventional telephoto primes.
A 67mm filter thread provides broad compatibility with screw-in filter accessories. The lens weighs 800g, reflecting the build quality expected in the medium format segment. Image stabilization is not included, which aligns with the deliberate, supported shooting approach well-suited to this type of lens. Mount compatibility is native to the Mamiya 645 system, ensuring seamless integration with Mamiya 645 camera bodies.
For photographers already invested in the Mamiya 645 system who want a telephoto prime with a distinctive optical character, this lens offers a focused and purposeful tool.
Pros — Mamiya 145mm f/4
- ✓Dedicated Mamiya 645 mount ensures native compatibility with the Mamiya 645 camera system
- ✓145mm telephoto prime focal length offers a focused, single-purpose optical design
- ✓f/4 maximum aperture provides a solid exposure baseline for a special-effect medium format prime
Cons — Mamiya 145mm f/4
- ✗No autofocus support — manual focus only, which may slow down shooting in dynamic situations
- ✗f/4 maximum aperture is relatively modest and limits use in lower light conditions
- ✗No image stabilization, making careful technique or support essential at 145mm
Videos — Mamiya 145mm f/4
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