Pentax smc FA 645 120mm f/4 Macro
The Pentax 120mm f/4 Macro is a 120mm f/4 lens designed for Pentax 645 mount cameras. Used copies start from $349.18 on GearFocus, with buyer protection on every purchase.
Pentax smc FA 645 120mm f/4 Macro
Used Pentax 120mm f/4 Macro Listings on GearFocus
Lens Overview — Pentax 120mm f/4 Macro
Key Features — Pentax 120mm f/4 Macro
Pentax 645 Mount: Designed specifically for the Pentax 645 medium format system, ensuring full native compatibility with Pentax 645 bodies.
1:1 Macro Capability: Achieves true life-size reproduction, allowing fine detail capture of small subjects at medium format resolution.
120mm Focal Length: Provides a comfortable working distance from the subject at macro distances, reducing the risk of disturbing sensitive subjects or blocking light.
f/4 Maximum Aperture: Maintains a consistent f/4 aperture across the full focus range, giving predictable exposure whether shooting at infinity or at minimum focus distance.
Autofocus and Manual Focus: Supports both AF and MF modes, letting photographers switch to precise manual control when critical focus accuracy is needed at close range.
smc Lens Coating: Pentax's Super Multi-Coating reduces flare and ghosting, preserving contrast and color accuracy in close-up shooting situations.
Lens Specifications — Pentax 120mm f/4 Macro
| Spec | Detail |
|---|---|
| Use Cases | Macro, Studio |
| Lens Type | Macro |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 120mm |
| Maximum Aperture | f/4 |
| Camera System | Medium Format |
| Lens Mount | Pentax 645 |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | None |
| Filter Thread | 67mm |
Description — Pentax 120mm f/4 Macro
The Pentax smc FA 645 120mm f/4 Macro is a prime lens built specifically for the Pentax 645 medium format system. Operating at a fixed 120mm focal length in the telephoto range, it is purpose-designed for macro photography on medium format bodies. The f/4 maximum aperture delivers consistent light transmission, while the support for both autofocus and manual focus gives photographers precise control over critical focus placement — especially important when working at close subject distances.
A 67mm filter thread makes it straightforward to use with a wide variety of standard filter accessories. At 700g, the lens has a solid build quality appropriate for professional medium format use. There is no image stabilization, so tripod use or careful technique is recommended during close-up sessions.
For Pentax 645 system users looking for a dedicated macro prime in the telephoto range, this lens offers a focused, capable tool for detail and close-up work.
Pros — Pentax 120mm f/4 Macro
- ✓Fixed 120mm telephoto focal length optimized for macro work in the medium format range
- ✓Supports both autofocus and manual focus (focusType: Auto, Manual) for flexible shooting control
- ✓Maximum aperture of f/4 provides consistent exposure at all focus distances
Cons — Pentax 120mm f/4 Macro
- ✗No image stabilization (imageStabilization: None), which can be challenging when shooting handheld at macro distances
- ✗f/4 maximum aperture limits light gathering compared to faster medium format primes
- ✗Compatible exclusively with the Pentax 645 mount, limiting the user base to that specific system
Videos — Pentax 120mm f/4 Macro
Canon 100mm f2.8 macro (non-USM) vs Pentax 645 120mm f4 macro lens test on Canon 5D MK II — Fishinglam