Pentax HD PENTAX-DA11-18mmF2.8ED DC AW Ultra-Wide-Angle Zoom Lens 17-27.5mm

About Pentax HD PENTAX-DA11-18mmF2.8ED DC AW Ultra-Wide-Angle Zoom Lens 17-27.5mm

• Wide-angle zoom is designed for APS-C-format Pentax K-mount cameras and offers a 17-27.5mm equivalent focal length range.
• Constant f/2.8 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 moisture and grease. Weather-resistant construction incorporates 10 distinct seals about the lens body to prevent the intrusion of moisture or dust.