Pentax SMC 100mm f/4 Macro Lens
The Pentax 100mm f/4 Macro is a 100mm f/4 lens designed for Pentax K mount cameras. Used copies start from $102 on GearFocus, with buyer protection on every purchase.
Pentax SMC 100mm f/4 Macro Lens
Used Pentax 100mm f/4 Macro Listings on GearFocus
Lens Overview — Pentax 100mm f/4 Macro
Key Features — Pentax 100mm f/4 Macro
100mm Prime Focal Length: Fixed 100mm provides a comfortable working distance between the lens and subject, reducing the risk of disturbing small or sensitive subjects during macro shooting.
1:1 Macro Capability: Designed specifically for close-up work, allowing life-size reproduction of subjects on the sensor.
Manual Focus Only: No autofocus motor means focus is fully under the photographer's control, which is well-suited to macro work where depth of field is extremely shallow.
f/4 Maximum Aperture: A dedicated macro aperture that balances usable depth of field with adequate light gathering for close-up subjects.
Full-Frame Coverage: Designed for full-frame sensors, so it can be used on both full-frame and APS-C Pentax K-mount bodies without vignetting.
Pentax K Mount: Native K-mount compatibility makes this lens a straightforward fit for a wide range of Pentax DSLR bodies.
Lens Specifications — Pentax 100mm f/4 Macro
| Spec | Detail |
|---|---|
| Use Cases | Macro, Product, Creative Effects |
| Lens Type | Macro |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 100mm |
| Maximum Aperture | f/4 |
| Camera System | DSLR |
| Lens Mount | Pentax K |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 49mm |
Description — Pentax 100mm f/4 Macro
The Pentax SMC 100mm f/4 Macro is a prime lens built around the Pentax K mount, offering full-frame sensor coverage for use on DSLR camera systems. With a fixed 100mm focal length and a maximum aperture of f/4, it is purpose-designed for macro and close-up photography. The lens is manual focus only, with no autofocus capability — a setup that suits macro photographers who value exact, hands-on control over their focal plane.
Image stabilization is not present, so a steady hand or support is recommended when shooting at close distances. Accepting 49mm screw-in filters, this lens keeps your filter investment minimal, and its 290g weight ensures it remains a light, manageable option in the field. Straightforward and uncluttered in its feature set, the SMC 100mm f/4 Macro is a dedicated close-up tool for the Pentax K-mount shooter.
Pros — Pentax 100mm f/4 Macro
- ✓Lightweight at 290g, making it easy to handle during close-up shooting sessions
- ✓Full-frame coverage via Pentax K mount ensures compatibility across both full-frame and crop-sensor DSLR bodies
- ✓100mm prime focal length provides a useful working distance for macro subjects
Cons — Pentax 100mm f/4 Macro
- ✗No autofocus — manual focus only, which may slow down shooting for some users
- ✗Maximum aperture of f/4 is relatively modest, limiting light-gathering in low-light macro situations
- ✗No image stabilization, which can be a challenge when shooting handheld at close focusing distances
Videos — Pentax 100mm f/4 Macro
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