Sigma 18 250mm f35 63 DC OS Lens for Pentax

13.8x Zoom Lens which features Optical Stabilisation, fast focusing, aspherical and SLD elements for sharp picture quality.13.8x Zoom RangeThe focal length range of 18 250mm covers every perspective from true wideangle to long telephoto, so this lens may be the only one you'll need to carry.Optical StabilisationThe OS system on the Sigma 18 250mm lens gives the equivalent of an extra four stops in shake reduction, allowing you to set much slower shutter speeds than would otherwise be possible, especially useful in low light.Optical FeaturesThis lens contains four SLD Super Low Dispersion elements and three aspherical elements to counteract just about every aberration, making for sharp images throughout the zoom range. Also featured is Sigma's Super Multi Layer Coating which acts to eliminate both ghosting and flare, even for backlit subjects.Hyper Sonic MotorThe HSM included in this lens allows it to focus quickly and accurately on your subject. All focus is internal so fitting filters is easy.Great for CloseupsThe Sigma 18 250mm OS lens has a minimum focusing distance of 45cm 17.7 throughout the zoom range, which gives a macro magnification of up to 13.4 which is great for closeup photography.Additional SpecificationsLens Construction 18 Elements in 14 GroupsAngle of View 69.3° 5.7°Minimum Aperture f22Supplied Accessories Petal Lens Hood, Front and Rear Caps, Manual, Warranty CardNB. This lens is for digital SLR cameras only with an APS C sized image sensor.