Pentax HD FA 31mm f/1.8 Limited Wide Angle Lens - Black
The Pentax 31mm f/1.8 is a 31mm f/1.8 lens designed for Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Pentax HD FA 31mm f/1.8 Limited Wide Angle Lens - Black
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Lens Overview — Pentax 31mm f/1.8
Key Features — Pentax 31mm f/1.8
31mm f/1.8 Prime: A fixed 31mm focal length with a fast f/1.8 maximum aperture suits everyday wide-angle shooting, environmental portraits, and lower-light situations.
HD Lens Coating: Pentax's HD (High Definition) multi-layer coating reduces flare and ghosting for improved contrast and color fidelity in challenging lighting.
Full-Frame Coverage: Designed for full-frame Pentax K-mount bodies, it also works on APS-C DSLRs without vignetting, giving an equivalent 47.5mm field of view.
Pentax K Mount: Compatible with the broad range of Pentax K-mount DSLR bodies, including both full-frame and crop-sensor models.
Autofocus & Manual Focus: Supports both AF and MF operation, allowing shooters to switch between modes depending on the subject and shooting scenario.
Limited Series Build: Part of Pentax's premium Limited lens lineup, featuring a metal barrel construction and refined fit and finish aimed at durability and handling quality.
Lens Specifications — Pentax 31mm f/1.8
| Spec | Detail |
|---|---|
| Use Cases | Travel |
| Lens Type | Prime |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 31mm |
| Maximum Aperture | f/1.8 |
| Camera System | DSLR |
| Lens Mount | Pentax K |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | None |
| Filter Thread | 58mm |
Description — Pentax 31mm f/1.8
The Pentax HD FA 31mm f/1.8 Limited is a full-frame prime lens for the Pentax K mount, offering a fixed 31mm focal length with a fast f/1.8 maximum aperture. It supports both autofocus and manual focus, giving DSLR photographers the flexibility to work in a range of shooting situations. Weighing 341g, it remains a compact and portable option well-suited to everyday carry.
The 58mm filter thread accommodates a wide variety of commonly available filter accessories. As a prime lens with no zoom capability, the 31mm focal length encourages intentional framing and delivers a consistent wide-angle perspective. There is no image stabilization built into this lens, so photographers working in lower-light conditions will want to account for that through shutter speed selection or in-body stabilization.
The lens is categorized as a standard focal length range prime designed for DSLR camera systems, making it a focused, purpose-built optic for Pentax K-mount shooters looking for a fast wide-angle prime.
Pros — Pentax 31mm f/1.8
- ✓Wide f/1.8 maximum aperture enables strong subject separation and low-light capability
- ✓Full-frame coverage on the Pentax K mount makes it versatile across both full-frame and crop-sensor DSLR bodies
- ✓Supports both autofocus and manual focus operation for flexible shooting control
Cons — Pentax 31mm f/1.8
- ✗No image stabilization, which can be a limitation in very low-light or slow-shutter situations
- ✗Compatible only with Pentax K-mount bodies, limiting the potential user base significantly
- ✗31mm focal length may feel too wide for portrait-focused shooters and too short for tighter isolations