HD Pentax DA* 11-18mm F2.8 ED DC AW Lens
High-end Star series lens ▪ K-Mount Lens ▪ APS-C Format ▪ 17-27.5mm (35mm Equivalent) ▪ Aperture Range: F2.8 to F22 ▪ Two Aspherical Elements, Two ED Elements ▪ One ED Aspherical Element ▪ Aero Bright II and SP Coatings ▪ DC Autofocus Motor ▪ Quick-Shift Focus System, Focus Clamp ▪ Weather-Sealed Construction ▪ Rounded 9-Blade Diaphragm ▪ Non-protruded front element for external filter applicaiton.
You can now own a constant F2.8 aperture ultra wide angle zoom lens. Covering a versatile range of wide-angle focal lengths, the HD Pentax DA* 11-18mm f/2.8 ED DC AW from Pentax is a 17-27.5mm-equivalent zoom for APS-C-format cameras.
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.
The optical design incorporates a series of aspherical and low dispersion elements, which help to control distortion and color fringing for improved sharpness and clarity, and an Aero Bright II Coating has been applied to benefit contrast and color accuracy. Additionally, a Super Protect Coating, along with a weather-sealed design, make this lens suitable for use in trying weather conditions.
Wide-angle zoom is designed for APS-C-format Pentax K-mount cameras and offers a 17-27.5mm equivalent focal length range.
HD Coating 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.
Constant F2.8 maximum aperture suits working in difficult lighting conditions and offers consistent illumination throughout the zoom range.
Two aspherical elements, two extra-low dispersion elements, and one aspherical element made from extra-low dispersion glass are used to significantly reduce both spherical and chromatic aberrations throughout the zoom range for improved sharpness, clarity, and color accuracy.
Aero Bright II Coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.
SP (Super Protect) Coating has also been applied to the front element to guard against dust and stain.
DC motor delivers quick and precise autofocus performance and an integrated Focus Clamp mechanism can be used to lock the focusing position in place to prevent accidental adjustments.
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. Weather-resistant construction incorporates 10 distinct seals about the lens body to prevent the intrusion of moisture or dust.
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.
A quick-shift focusing clutch mechanism also affords fast switching between autofocus and manual focus operation.
Dedicated space for wrapping an optional heating device around the lens to prevent freezing and condensation from accumulating when working in cold temperatures.
Focus Clamp Mechanism. When the focus clamp is turned on, it locks focus lens even if the focus ring is rotated. This mechanism also helps when wide width type heater wraps over the focus ring and is moved carelessly because it prevents focus lens from moving.
Rounded nine-blade diaphragm contributes to a pleasing bokeh quality.
Non-protruded front element for external filter applicaiton. This is a critical design for user who extensively uses external filters.
HD Pentax DA* 11-18mm f/2.8 ED DC AW Lens Review
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||11 to 18mm (35mm Equivalent Focal Length: 17 to 27.5mm)
|Angle of View
||104° to 76°
|Minimum Focus Distance
||11.81" / 30 cm
||16 Elements in 11 Groups
||82 mm (Front)
|Dimensions (ø x L)
||3.54 x 3.937" / 90 x 100 mm
||1.6 lb / 704 g
Lens Hood PH-RBF82
Lens Cap O-LC82
Lens Case S120-150
Lens Mount Cap K
1 year warranty coverage