Pentax DA 18-55mm f/3.5-5.6 AL II Lens for Pentax and Samsung Digital SLR Cameras Great wide-angle capability with a standard 3X zoom range. The PENTAX-original SP (Super Protect) coating repels dust, water and grease to keep your lens clean and your image quality at its peak. The focal length is equivalent to 27mm - 82.5mm in the 35mm format. Improved resolution takes full advantage of the high-resolution sensors in modern PENTAX digital SLR cameras. Aspherical elements help to compensate for spherical aberration.