Sigma 18-250mm f3.5-6.3 DC MACRO HSM for Pentax Digital SLR Cameras

A compact, lightweight super-zoom designed exclusively for digital SLR cameras with APS-C size sensors
Includes Sigma’s OS (Optical Stabiliser) technology
HSM (Hyper Sonic Motor) ensures very fast and quiet auto focusing
An ideal alternative to a standard zoom
Four SLD (Special Low Dispersion) glass elements and three aspherical lenses produce superior image quality
Multi-layer coating optimises quality for digital photography
Compact and lightweight
Non rotating front element makes it suitable for use with polarising filters and the included petal type lens hood