Sigma 50 500mm f4 63 DG OS Lens for Pentax AF

Ultra Telephoto Zoom lens with optical stabilisation, HSM rear focus and Super Low Dispersion glass to offer a high quality and easy to handle optic.Standard to Ultra TelephotoThis 10x zoom lens covers everything from standard perspective to something more akin to the image size as seen through binoculars. What’s more it’s compatible with digital SLRs with both APS C and full 35mm sized image sensors. An ideal, flexible lens for motor sports, aviation and wildlife photography.Optical StabilisationThe OS system within this lens gives up to four extra stops of motion steadying. You can choose from two modesMode 1 General PhotographyMode 2 Panning such as at motor racesSuperb OpticsThe 50 500mm DG lens features four SLD Super Low Dispersion elements for low levels of chromatic aberration throughout the zoom range, and Super Multi Layer Coating ensures that flare and ghosting are drastically reduced.Hyper Sonic MotorThe HSM Hyper Sonic Motor inside the Sigma 50 500mm lens provides fast and quiet focusing. In addition to this, the Read Focus system also minimises image distortions or aberrations during focusing. The rear focusing system also means that attachments such as petal hoods can be used as the lens barrel does not rotate during focusing.Additional FeaturesOptional 1.4x and 2x Sigma converters available separately to extend to a 70 700mm f6.3 8.8MF or 100 1000mm f9 12.5MF lens13.1 Macro Magnification at 200mm focal length for great close upsZoom Lock to stop lens extending during transit or if mounted at an angleRemovable Tripod Socket supplied plus step down 95 86mm adapter for filters APS C format cameras onlyAdditional SpecificationsLens Construction 22 Elements in 16 GroupsAngle of View 46.8° 5°Diaphragm Blades 9Minimum Aperture f22Minimum Focus 50 180cmMax Image Magnification 13.1