Sigma 70mm F28EX DG Macro for Pentax AF

With specifically digital SLRs in mind, Sigma have employed the very latest optical technology in the production of this medium telephoto macro lens. The 70mm focal length gives an equivalent field of view as a 105mm lens when used on digital SLR cameras with an APS C size image sensor. However, as with other DG series lenses, it is equally suitable for traditional 35mm cameras. The design of this lens makes it suitable for taking pictures in all situations both with natural light conditions or flash. The narrow angle of view is a great aid for simplifying backgrounds and shallow depth of field makes it easier to handle the composition.Superior clarity and colour accuracy Special low dispersion elements SLD give excellent correction of aberration, ensuring crisp results.Reduce Ghosting and Flare Sigma’s super multi layer lens coating reduces flare and ghosting, and helps create a natural color balance.Floating Focus System The floating focus system provides extremely high optical performance from infinity to 11 Macro. Focus Limiter Switch A ‘Focus Limiter Switch’ in incorporated on the lens, improving the speed and accuracy of autofocus by limiting the focus range from 25.7cm to 48cm and 55cm to infinity.Screw in lens hood A screw in lens hood is included for convenient use of circular polarising filters. The included hood LH620 01 is designed so a 77mm lens front cap can be attached whilst the hood is in place.Magnification scale A magnification scale is displayed on the lens barrel, ensuring ease of use.Main SpecificationsLens Construction 10 Elements in 9 Groups Angle of View 34.3 degrees Number of Diaphragm Blades 9 Minimum Aperture F22 Minimum Focusing Distance 25cm Maximum Magnification 11 Dimensions Diameter 76mm X Length 95mm Weight 527g