Wide-Angle Lenses Wide-Angle Lenses Standard Lenses Telephoto Lenses Macro Lenses
HD PENTAX-DA★11-18mmF2.8ED DC AW
- APS-C
- Zoom
HD PENTAX-DA★11-18mmF2.8ED DC AW
- APS-C
- Zoom
An ultra-wide-angle, Star-series zoom lens, providing exceptional optical performance with a large F2.8 aperture over the entire zoom range
This ultra-wide-angle zoom lens delivers high-resolution, high-contrast images without blurring at the edges, and assures excellent imaging performance in high-grade digital photography, even at open aperture.
It has been developed as the latest model of the new-generation Star (★) series — a lens that provides exceptional image quality to be able to accommodate the super-high-performance digital cameras of the future.
With the introduction of this lens, the high-quality, high-performance Star series now provides a wide angle-of-view coverage —from ultra-wide angle to telephoto — with its compact models featuring a large F2.8 maximum aperture,
which are exclusively designed for use with PENTAX APS-C-format digital SLR cameras.
In addition to an outstanding dustproof, weather-resistant construction, and -10°C cold-resistant construction, the lens provides a Focus Clamp Mechanism to lock focus at the desired focal point.
It also provides useful features to improve performance and dependability in harsh outdoor conditions: a space specifically designed for wrapping a heating device to prevent dew condensation, and a metallic frame structure to more effectively transmit the heat of the heating device to the lens. These devices greatly improve the lens’s operability when shooting landscapes and starry skies.
Black
Included Accessories: Lens Hood PH-RBF82, Lens Cap O-LC82, Lens Case S120-150, Lens Mount Cap K
Sample Images
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Aperture: F8.0, Shutter speed: 1/400sec, Focal length: 13.0mm, White balance: Daylight, ISO sensitivity: 200, Finishing touch/Custom image: Landscape Photo by Yoshiaki Kobayashi
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Aperture: F5.6, Shutter speed: 1/800sec, Focal length: 18.0mm, White balance: Daylight, ISO sensitivity: 200, Finishing touch/Custom image: Bright Photo by Yoshiaki Kobayashi
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Aperture: F4.5, Shutter speed: 1/500sec, Focal length: 18.0mm, White balance: Daylight, ISO sensitivity: 200, Finishing touch/Custom image: Landscape Photo by Yoshiaki Kobayashi
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Aperture: F8.0, Shutter speed: 1/1250sec, Focal length: 11.0mm, White balance: Daylight, ISO sensitivity: 200, Finishing touch/Custom image: Bright Photo by Yoshiaki Kobayashi
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Aperture: F11, Shutter speed: 1/60sec, Focal length: 18.0mm, White balance: CTE, ISO sensitivity: 200, Finishing touch/Custom image: Landscape Photo by Yoshiaki Kobayashi
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Aperture: F8.0, Shutter speed: 1/400sec, Focal length: 11.0mm, White balance: CTE, ISO sensitivity: 800, Finishing touch/Custom image: Muted Photo by Yoshiaki Kobayashi
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Aperture: F7.1, Shutter speed: 1/250sec, Focal length: 11.0mm, White balance: Auto, ISO sensitivity: 200, Finishing touch/Custom image: Bright Photo by Kazutoshi Yoshimura
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Aperture: F16, Shutter speed: 1/20sec, Focal length: 13.0mm, White balance: Auto, ISO sensitivity: 100, Finishing touch/Custom image: Bright Photo by Kazutoshi Yoshimura
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Aperture: F9.0, Shutter speed: 1/1000sec, Focal length: 11.0mm, White balance: Auto, ISO sensitivity: 200, Finishing touch/Custom image: Reversal film Photo by Kazutoshi Yoshimura
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Aperture: F8.0, Shutter speed: 1/125sec, Focal length: 18.0mm, White balance: CTE, ISO sensitivity: 100, Finishing touch/Custom image: Landscape Photo by Ichiro Murata
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Aperture: F8.0, Shutter speed: 1/750sec, Focal length: 11.0mm, White balance: CTE, ISO sensitivity: 100, Finishing touch/Custom image: Landscape Photo by Ichiro Murata
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Aperture: F8.0, Shutter speed: 1/1000sec, Focal length: 18.0mm, White balance: CTE, ISO sensitivity: 100, Finishing touch/Custom image: Landscape Photo by Ichiro Murata
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Aperture: 8.0, Shutter speed: 1/1000sec, Focal length: 11.0mm, White balance: Auto, ISO sensitivity: 200, Finishing touch/Custom image: Natural Photo by Nicolas Claris
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Aperture: 8.0, Shutter speed: 1/500sec, Focal length: 11.0mm, White balance: Auto, ISO sensitivity: 200, Finishing touch/Custom image: Natural Photo by Nicolas Claris
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Aperture: 8.0, Shutter speed: 1/500sec, Focal length: 11.0mm, White balance: Auto, ISO sensitivity: 200, Finishing touch/Custom image: Natural Photo by Nicolas Claris
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Aperture: 6.3, Shutter speed: 1/500sec, Focal length: 12.0mm, White balance: Auto, ISO sensitivity: 200, Finishing touch/Custom image: Natural Photo by Nicolas Claris
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Aperture: 7.1, Shutter speed: 1/320sec, Focal length: 12.0mm, White balance: Auto, ISO sensitivity: 200, Finishing touch/Custom image: Natural Photo by Nicolas Claris
Features / Specifications
- Large F2.8 maximum aperture
- Despite its compact dimensions, this ultra-wide-angle zoom lens provides a focal length of 11 to 18 millimeters (equivalent to 17mm to 27.5mm in 35mm format) to produce magnificent, dynamic images. Since its maximum aperture is fixed at F2.8 over the entire zoom range, it delivers sharp, bright images of scenes with starry skies. Thanks to a minimum focusing distance of 0.3 meters, the lens also lets the photographer capture true-to-life close-up images by emphasizing the depth of field with an effectively defocused background.
- HD Coating*1 to enhance imaging power
- This lens features high-grade, multi-layer HD Coating,* which reduces the average reflectance in the visible ray spectrum to less than 50% of conventional multi-layer coatings. It effectively minimizes flare and ghost images even in demanding lighting conditions such as backlighting.
* HD stands for High Definition.
- Ideal design optimized for photography of landscapes and star-lit scenes
- The unique Focus Clamp Mechanism allows the photographer to lock the lens’s focal point, even when the focus ring is rotated. This improves the lens’s operability in photographing such subjects as landscapes and star-lit scenes, which demand high-precision focusing during extended exposures. It also has special features for improved operability and versatility in outdoor shooting, such as a space for wrapping heating wires around the lens barrel to prevent dew condensation, without affecting focus-ring operation; and a metallic frame structure to more effectively transmit the heat of the heating device to the lens.
- Dustproof, weather-resistant and -10 ℃ cold-resistant construction
- Developed as an AW (All Weather) model, this zoom lens features a dustproof, weather-resistant construction to prevent the intrusion of water and dust particles into the lens interior. By pairing it with a PENTAX weather-resistant digital SLR camera body, this assures a highly durable, reliable digital imaging system that performs superbly in demanding shooting settings — even in rain or mist, or at locations prone to water splashes. Anticipating use in cold locations, this lens assures solid, trouble-free operation even at freezing temperatures.
- Other features
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- 1. Smooth, quiet AF operation using a DC motor
- 2. Round-shaped, nine-blade diaphragm to produce a natural, beautiful bokeh (defocus) effect while minimizing the streaking effect of point light sources
- 3. Quick-Shift Focus System to provide an instant shift to manual-focus operation after locking the subject in focus during AF operation by pressing the shutter-release button halfway down; usable at any time during AF operation
- 4. SP (Super Protect) Coating to keep the lens’s front surface free of dust and stains
- 【MTF Chart】
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Geometric optics MTF (MTF calculated without referencing the effects of light diffraction phenomenon)
F2.8
F2.8
Wave optical MTF (MTF calculated referencing the effects of light diffraction phenomenon)
F2.8
F2.8
Spatial Frequencies S:Sagittal M:Meridional 10 lines/mm 
30 lines/mm 
Since it is impossible to avoid light diffraction phenomenon on the actual lens, wave optical MTF is more realistic.
However, geometric MTF is appropriate if you want to compare only the effects of geometric aberration correction on MTF.
| Focal Length | 11-18mm Equivalent to 17-27.5mm in 35mm format(when attached to PENTAX APS-C size DSLR cameras) |
|---|---|
| Maximum Aperture | F2.8 |
| Minimum Aperture | F22 |
| Lens Construction | 16 elements in 11 groups |
| Angle of View (Diagonal) | 104-76° (when attached to PENTAX APS-C size DSLR cameras) |
| Mount | KAF3 |
| Minimum Focusing Distance | 0.3m (0.98ft.) |
| Maximum Magnification | 0.10x |
| Filter Diameter | 82mm |
| Diaphragm Control | Fully automatic |
| Number of Diaphragm Blades | 9 Rounded diaphragm （11mm:F2.8-4.5 18mm:F2.8-5.0） |
| Aperture: Ring | N/A |
| Tripod Mount | N/A |
| Lens Hood | PH-RBF82 (included) |
| Lens Cap | O-LC82 (included) |
| Lens Case | S120-150 (included) |
| Maximum Diameter x Length | approx. 90mm x 100mm (approx. 3.5in. x 3.9in.) |
| Weight | approx. 704g / with hood approx. 739g (approx. 24.8 oz./ with hood approx. 26.1oz.) |
| Temperature | -10°C～40°C (14°F～104°F) |
| Humidity | 85% or less (no condensation) |
| Included Accessories | Lens Hood PH-RBF82, Lens Cap O-LC82, Lens Mount Cap K, Lens Case S120-150 |
| Others | HD Coating SP (Super Protect) Coating AW (All Weather Resistant) Quick-shift Focus System (QFS/M) DC (DC Motor) Focus Clamp Function |
Compatible converters (Click here for details)
A 2x -S
*Please apply the latest updater of Digital Camera Utility to update the version to Digital Camera Utility 5. In case the software version is below Digital Camera Utility 5, this lens might not be displayed correctly.
