HD Pentax DA 21mm f/3.2 AL Limited
The Pentax 21mm f/3.2 AL is a 21mm f/3.2 lens designed for Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
HD Pentax DA 21mm f/3.2 AL Limited
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Lens Overview — Pentax 21mm f/3.2 AL
Key Features — Pentax 21mm f/3.2 AL
21mm Wide-Angle Prime: Fixed 21mm focal length equivalent to approximately 32mm in full-frame terms on APS-C, well-suited for street, landscape, and interior shooting.
f/3.2 Maximum Aperture: Moderately wide aperture provides usable depth-of-field separation and adequate light gathering for everyday shooting conditions.
HD Multi-Layer Coating: Pentax's HD coating reduces flare and ghosting for improved contrast and color rendition compared to earlier SMC-coated versions.
Autofocus & Manual Focus: Supports both AF and MF operation, giving shooters flexibility to switch modes depending on the subject or shooting situation.
Compact 140g Build: One of the lightest wide-angle primes in the Pentax lineup, making it easy to carry all day without adding meaningful weight to the kit.
Limited Series Construction: Part of Pentax's premium Limited lens family, featuring an all-metal barrel with precise build quality and a distinctive tactile finish.
Lens Specifications — Pentax 21mm f/3.2 AL
| Spec | Detail |
|---|---|
| Use Cases | Travel |
| Lens Type | Wide-Angle |
| Format | APS-C |
| Zoom/Prime | Prime |
| Focal Length | 21mm |
| Maximum Aperture | f/3.2 |
| Camera System | DSLR |
| Lens Mount | Pentax K |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | None |
| Filter Thread | 49mm |
Description — Pentax 21mm f/3.2 AL
The HD Pentax DA 21mm f/3.2 AL Limited is a prime wide-angle lens built for APS-C format Pentax DSLR cameras, using the Pentax K lens mount. Its fixed 21mm focal length places it squarely in the wide-angle range, suitable for landscapes, interiors, and street photography. The maximum aperture of f/3.2 provides a solid baseline for controlled-light shooting scenarios.
Weighing just 140g, this lens is remarkably lightweight and easy to carry for extended shooting sessions without fatigue. It accepts 49mm filter thread accessories, keeping the cost of circular polarizers, ND filters, and protective filters very accessible. The lens supports both autofocus and manual focus, offering flexibility across different shooting situations.
There is no image stabilization built into the lens, so shooters relying on this lens in dim conditions should be mindful of shutter speed. Overall, the HD Pentax DA 21mm f/3.2 AL Limited is a compact, lightweight wide-angle prime purpose-built for the Pentax K mount APS-C DSLR system.
Pros — Pentax 21mm f/3.2 AL
- ✓Extremely lightweight at just 140g, making it highly portable for everyday carry
- ✓Prime 21mm wide-angle focal length delivers a dedicated wide perspective for landscapes and interiors
- ✓Supports both autofocus and manual focus for versatile shooting flexibility
Cons — Pentax 21mm f/3.2 AL
- ✗No image stabilization, which can be a challenge in low-light or slow-shutter scenarios
- ✗Maximum aperture of f/3.2 is relatively modest for a prime lens in low-light situations
- ✗APS-C-only format limits compatibility — not suitable for full-frame Pentax bodies
Reviews — Pentax 21mm f/3.2 AL
Videos — Pentax 21mm f/3.2 AL
Pentax DA 21mm Limited Review — PHOTO UNIVERSE
Frequently Asked Questions — Pentax 21mm f/3.2 AL
What camera mount does this lens use?+
The HD Pentax DA 21mm f/3.2 AL Limited uses the Pentax K lens mount. It is designed for Pentax DSLR cameras within the K mount ecosystem.
Does this lens support autofocus?+
Yes, the lens supports both autofocus and manual focus operation. Shooters can switch between the two modes depending on their preferences and shooting conditions.
What sensor format is this lens designed for?+
This lens is designed for APS-C format cameras. It is not intended for full-frame sensor bodies within the Pentax system.
Does the lens have image stabilization?+
No, this lens does not include built-in image stabilization. Shooters should account for this when working in low-light or when using slower shutter speeds.
What filter size does the HD Pentax DA 21mm f/3.2 AL Limited accept?+
The lens has a 49mm filter thread, which is a compact and widely available filter size that keeps accessory costs reasonable.
How heavy is this lens?+
The lens weighs just 140g, making it one of the lighter wide-angle prime options available for the Pentax K mount system and well-suited for travel and everyday use.