Pentax Macro 50mm f/4 SMCP-M Manual Focus Lens
The Pentax Macro 50mm f/4 is a 50mm f/4 lens designed for Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Pentax Macro 50mm f/4 SMCP-M Manual Focus Lens
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Lens Overview — Pentax Macro 50mm f/4
Key Features — Pentax Macro 50mm f/4
50mm Macro Prime: A fixed 50mm focal length delivers a natural, standard perspective well-suited to close-up and detail work.
1:2 Macro Capability: Achieves 1:2 (half life-size) reproduction ratio, enabling detailed close-up work of small subjects without extension tubes.
Manual Focus Only: Smooth manual focus ring gives precise, repeatable focus placement at close distances where autofocus systems typically struggle.
Full-Frame Coverage: Covers a full-frame image circle with no vignetting on any Pentax K-mount body, film or digital.
Pentax K Mount: Mounts natively to Pentax K-mount cameras and can be adapted to mirrorless systems for fully manual use.
f/4 Maximum Aperture: A workable baseline for controlled macro shooting environments such as studio tabletop or natural light setups.
Lens Specifications — Pentax Macro 50mm f/4
| Spec | Detail |
|---|---|
| Use Cases | Macro, Portrait, Product |
| Lens Type | Macro |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 50mm |
| Maximum Aperture | f/4 |
| Camera System | DSLR |
| Lens Mount | Pentax K |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 49mm |
Description — Pentax Macro 50mm f/4
The Pentax Macro 50mm f/4 SMCP-M is a manual focus, prime lens designed for macro and close-up photography. Built for the Pentax K mount, it provides full-frame coverage and a standard 50mm focal length. The maximum aperture of f/4 is well-suited to controlled shooting environments where light can be managed with flash or continuous sources.
At just 215g, this lens is easy to handle during detailed work at a desk or in the field. The 49mm filter thread allows the use of a wide variety of screw-on filters. With no image stabilization and manual focus only, this lens rewards photographers who appreciate deliberate, hands-on technique — a hallmark of the SMCP-M lens family.
It is an accessible vintage option for Pentax K-mount shooters looking to explore macro photography with a lightweight, purpose-built prime.
Pros — Pentax Macro 50mm f/4
- ✓Lightweight at only 215g, making it comfortable for extended macro shooting sessions
- ✓Full-frame coverage means no image circle limitations on any Pentax K-mount body
- ✓Prime 50mm focal length provides a consistent, standard perspective for macro work
Cons — Pentax Macro 50mm f/4
- ✗Manual focus only — no autofocus option for photographers who prefer or require AF
- ✗Maximum aperture of f/4 is relatively modest, limiting light gathering in dim conditions
- ✗No image stabilization, which can make handheld macro shooting at close distances more challenging
Videos — Pentax Macro 50mm f/4
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