





more

See Options
Need help? Ask our experts.
The lens features an ultra-wide 21mm angle, allowing you to approach your subject to a distance of just seven centimeters from the lens front. This feature enables you to capture images with exaggerated perspective, making it ideal for both close-range and distant photography.
The lens incorporates four ED and one Super ED glass optical elements to minimize chromatic aberration and color bleeding. It also features a large-aperture negative meniscus optical element and a biconvex aspherical glass-mold optical element, ensuring sharp, crisp images without any fuzziness.
The lens boasts a high-grade texture and a solid appearance made possible by the use of metallic material. The machined aluminum lens barrel assures precision, while the anodized exterior parts project an image of quality and brilliance.
Yes, the lens features a dependable, weather-resistant construction. The mount section to the camera body and other movable parts, such as the focus ring, are all designed to resist the intrusion of rain and water into the lens interior.
Review Summary
Accidents happen where life happens. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failure, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for purchase Internationally or in U.S. Territories.
Browse our FAQ
Pentax K
Full Frame
Ultra-Wide Angle
Pentax K-01, Pentax K-1, Pentax K-1 Mark II, Pentax K-3, Pentax K-3 II, Pentax K-30, Pentax K-5 IIs, Pentax K-50, Pentax K-500, Pentax K-70, Pentax K-R, Pentax K-S1, Pentax K-S2, Pentax KP, Pentax KZ922
Pentax FA, Pentax HD
Base
28040
Black
Electromagnetic diaphragm
Fully automatic
Fixed
O-LW74A (included)
P80-150 (included)
14 - 104 Degree F (-10 - 40 Degree C)
85% or less (no condensation)
Auto Focus
7.1" / 18cm
21mm
f/2.4
67mm
92°
f/22
0.26x
HD Coating
SP (Super Protect) Coating
No
Yes
11 Elements in 8 Groups
8
14.7oz / 416g
2.9 x 3.5" / 74 x 89mm
027075302976











* If using a APS-C Lens on a Full Frame Camera OR Full-Frame Lens on a APS-C Camera then Image sensor will be narrowed down to APS-C size.
For any questions about compatibility with this product, call us at 800-223-2500 or you can email us any time.
| Models | SKU: PX2124B MFR: 28040 $1,296.95 $1,546.95 Save:$250.00 (16%) In Stock | $399.95 $549.95 Save:$150.00 (27%) In Stock | $446.95 $496.95 Save:$50.00 (10%) In Stock |
|---|---|---|---|
| Compatibility | Pentax K-1, Pentax K-1 Mark II | - | - |
| Kit Style | Base | Base | Base |
| Lens Type | Ultra-Wide Angle | Ultra-Wide Angle | Ultra-Wide Angle |
| Filter Size | 67mm | 49mm | 43mm, 49mm |
| Fixed Focal Length | 21mm | 15mm | 21mm |
| Lens Mount | Pentax K | Pentax K | Pentax K |
| Maximum Aperture | f/2.4 | f/4 | f/3.2 |
| Zoom Focal Length | NA | NA | NA |




Designed for use with: Pentax K-1 Mark II,Pentax K-1
Join VIP PRO
Earn 2X Points + Exclusive Perks!
Request a Callback
Chat one-on-one with an expert
Sell or Trade your Gear
Get started in 3 easy steps