Pentax HD PENTAX-D FA 21mm f/2.4 ED Limited DC WR Lens
The Pentax 21mm f/2.4 ED DC WR is a 21mm f/2.4 lens designed for Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Pentax HD PENTAX-D FA 21mm f/2.4 ED Limited DC WR Lens
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Lens Overview — Pentax 21mm f/2.4 ED DC WR
Key Features — Pentax 21mm f/2.4 ED DC WR
21mm f/2.4 Prime: A fixed ultra-wide focal length with a fast f/2.4 maximum aperture, offering genuine depth-of-field control uncommon at this angle of view.
HD Lens Coating: Pentax's HD coating reduces flare and ghosting, particularly useful when shooting wide-angle scenes with bright light sources in frame.
ED Glass Element: Extra-low dispersion glass minimizes chromatic aberration for cleaner contrast and color accuracy across the full frame.
Full-Frame Coverage: Designed to cover the full 35mm image circle, making it compatible with full-frame Pentax K-mount DSLRs without vignetting.
Weather-Resistant Construction: WR sealing protects against dust and moisture, supporting outdoor use in rain or dusty field conditions.
DC Autofocus Motor: An internal DC motor drives autofocus directly within the lens, enabling quieter and smoother focus operation than screw-drive systems.
Lens Specifications — Pentax 21mm f/2.4 ED DC WR
| Spec | Detail |
|---|---|
| Use Cases | Travel, Astrophotography |
| Lens Type | Prime |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 21mm |
| Maximum Aperture | f/2.4 |
| Camera System | DSLR |
| Lens Mount | Pentax K |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | None |
| Filter Thread | 67mm |
Description — Pentax 21mm f/2.4 ED DC WR
The Pentax HD PENTAX-D FA 21mm f/2.4 ED Limited DC WR is a prime, wide-angle lens built for the Pentax K mount, covering the full-frame format. Its fixed 21mm focal length establishes a broad perspective that suits landscape, architectural, and environmental photography, while the f/2.4 maximum aperture provides meaningful flexibility when shooting in lower light conditions. The lens supports both autofocus and manual focus operation, accommodating a range of shooting styles and subject types.
A 67mm filter thread keeps the lens compatible with widely available filter systems, a practical advantage for photographers who regularly use polarizers or ND filters outdoors. Weighing 416 grams, it is built to be a substantive but portable option in a Pentax shooter's wide-angle kit. Notably, no image stabilization is included in the optical design, so steady technique or a stable platform is recommended when shooting at slower shutter speeds.
As a DSLR-system lens in the Pentax K ecosystem, it is purpose-built for photographers committed to that platform who want a dedicated ultra-wide prime with a fast maximum aperture.
Pros — Pentax 21mm f/2.4 ED DC WR
- ✓Wide f/2.4 maximum aperture offers useful light-gathering capability for a 21mm prime
- ✓Full-frame coverage on the Pentax K mount makes it compatible with full-frame K-mount DSLRs
- ✓Supports both autofocus and manual focus, adding operational flexibility
Cons — Pentax 21mm f/2.4 ED DC WR
- ✗No image stabilization, which can be limiting for handheld shooting in low light
- ✗Exclusive to the Pentax K mount, limiting its use to that specific camera ecosystem
- ✗Fixed 21mm focal length offers no compositional flexibility without physically repositioning
Reviews — Pentax 21mm f/2.4 ED DC WR
Videos — Pentax 21mm f/2.4 ED DC WR
HD Pentax-D FA 21mm f/2.4 ED DC WR Limited Sample Photos, Real-world Use, Specs | Round Glass Review — David Hancock