Mamiya 645 300mm f/5.6 Sekor C Lens
The Mamiya 300mm f/5.6 is a 300mm f/5.6 lens designed for Mamiya 645 mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Mamiya 645 300mm f/5.6 Sekor C Lens
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Lens Overview — Mamiya 300mm f/5.6
Key Features — Mamiya 300mm f/5.6
300mm Medium Format Prime: A fixed 300mm focal length on medium format delivers a longer effective reach and larger image circle than equivalent 35mm telephoto lenses.
Mamiya 645 Native Mount: Designed specifically for the Mamiya 645 system, ensuring full optical and mechanical compatibility with Mamiya 645 film bodies.
f/5.6 Maximum Aperture: A maximum aperture of f/5.6 is typical for long telephoto primes of this format, balancing light transmission with manageable size and weight.
Manual Focus Design: Direct focus ring control gives photographers precise, repeatable focus suited to deliberate shooting workflows on a tripod.
67mm Filter Thread: A common 67mm screw-thread diameter makes it straightforward to source compatible UV, polarizing, or neutral density filters.
1200g Solid Build: At 1200g, the lens reflects the robust construction expected of professional medium format glass, though tripod or monopod support is advisable at this focal length.
Lens Specifications — Mamiya 300mm f/5.6
| Spec | Detail |
|---|---|
| Use Cases | Wildlife, Sports, Portrait |
| Lens Type | Prime |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 300mm |
| Maximum Aperture | f/5.6 |
| Camera System | Medium Format |
| Lens Mount | Mamiya 645 |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 67mm |
Description — Mamiya 300mm f/5.6
The Mamiya 645 300mm f/5.6 Sekor C is a telephoto prime lens built natively for the Mamiya 645 mount and designed for use within the medium format camera system. Its 300mm focal length makes it well-suited for photographing subjects at a distance, while the f/5.6 maximum aperture defines the amount of light the lens can gather at its widest setting. Focusing is entirely manual, giving the photographer hands-on control without any autofocus mechanism.
The lens features a 67mm filter thread, compatible with a broad range of commonly available screw-on filters. With a weight of 1200g, this is a solid, substantial lens that benefits from proper support during use. There is no image stabilization, so shooting handheld at this focal length will require attention to shutter speed and camera stability.
Pros — Mamiya 300mm f/5.6
- ✓300mm telephoto prime focal length suited for distant subject photography
- ✓Medium format lens designed natively for the Mamiya 645 mount system
- ✓67mm filter thread provides access to a widely available filter size
Cons — Mamiya 300mm f/5.6
- ✗Maximum aperture of f/5.6 limits light gathering capability, particularly in lower light conditions
- ✗No image stabilization, making stable support essential at 300mm
- ✗Manual focus only — no autofocus option for fast-moving subjects
Videos — Mamiya 300mm f/5.6
Mamiya 645 – Legendary cine lenses on a budget – Epic Episode #8 — Media Division