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- SDM (Supersonic Direct Drive Motor) :Shoot discreetly with in lens, auto focus motor operation for quick, smooth and quiet performance
- HD (High Definition): Treated with state of the art HD technology; a high grade, multi-layer coating, allowing the user to capture crisp, high-contrast images free of flare and ghosting, even under demanding lighting conditions
- ED (Extra Low Dispersion) glass lens elements deliver clear, high resolution imagery with outstanding edge to edge sharpness throughout the entire zoom range
A large-aperture ultra-wide-angle zoom lens providing sharp high-resolution images and a large F2 8 maximum aperture When mounted on the PENTAX 35mm full-frame digital SLR camera body this zoom lens covers a focal-length range from 15mm ultrawide angle to 30mm wide-angle * Thanks to its exaggerated perspective typical of an ultrawide angle lens and high-resolution imaging power it captures dynamic sweeping views of subjects especially in landscape photography