SPECIFICATIONS:

This large aperture telephoto zoom lens, incorporating Sigma's original Optical Stabiliser function, covers focal lengths from 70mm to 200mm and offers a constant aperture of F2.8 over the entire zoom range. The OS function offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. It makes shooting easy for many types of photography such as portraits and sports. Two FLD (“F” Low Dispersion) glass elements, which have performance equal to fluorite glass, and three SLD (Special Low Dispersion) glass elements provide excellent correction of colour aberration. The lens incorporates HSM (Hyper Sonic Motor), ensuring a quiet and high speed AF as well as full-time manual focus capability. It is also possible to attach Sigma’s optional APO Tele Converters.

• Ideal for handheld photography
  The lens is equipped with Sigma's own unique OS (Optical Stabiliser) function. This system offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible, making telephoto shooting easy. Mode 1 is ideal for general photography and Mode 2 is designed for panning subjects such as racing cars. For Sony and Pentax mount, the built-in OS function of this lens can be used even if the camera body is equipped with an anti-shake function. As compensation for camera shake is visible in the view finder, the photographer can easily check for accurate focus and ensure there is no subject movement
• Compact construction
  This lens has a compact construction with a diameter of 86.4mm (3.4in.), overall length of 197.6mm (7.8in.) and weight of 1,430g (50.4oz.). This compact and lightweight construction makes it ideal for many types of photography such as portraits, landscapes and sports.
• Excellent Optical Performance
  This lens features two FLD (“F” Low Dispersion) glass elements, which have the performance equal to fluorite glass, and three SLD (Special Low Dispersion) glass elements providing excellent correction of colour aberration. The Super Multi-Layer Coating reduces flare and ghosting and ensures high contrast images. High image quality is assured throughout the entire zoom range.
  FLD glass is the highest level low dispersion glass available with extremely high light transmission. This optical glass has a performance equal to fluorite glass which has a low refractive index and low dispersion compared to current optical glass. It also benefits from high anomalous dispersion.
  These characteristics give excellent correction for residual chromatic aberration (secondary spectrum) which cannot be corrected by ordinary optical glass and ensures high definition and high contrast images.
• High speed and quiet AF
  The lens incorporates HSM (Hyper Sonic Motor), ensuring high speed and quiet AF as well as full time manual focus capability.
  * For Sony and Pentax mount, AF will not function with DSLR cameras that do not support HSM.
• Inner focusing and inner zooming system
  The lens design incorporates an inner focusing and inner zooming systems. The overall length of the lens does not change during focusing and zooming, ensuring convenient handling. The inner focusing system also eliminates front lens rotation, making the lens particularly suitable for using circular polarising filters and the supplied petal-type lens hood. A removable tripod collar (TS-21) is included as a standard component
• Close focusing capability
  This lens has a minimum focusing distance of 140cm (55.1in.) throughout the entire zoom range and a maximum magnification ratio of 1:8.
• Rounded diaphragm
  This lens has a rounded 9 blade diaphragm which creates an attractive bokeh to the out of focus area.
• APO Tele-Converter (Optional)
  The addition of the optical 1.4x EX DG APO or 2x EX DG APO Tele Converters* produce a 98-280mm F4 AF telephoto zoom lens or a 140-400mm F5.6 AF telephoto zoom lens respectively.
  

• Lens Construction 22 Elements in 17 Groups
  
• Angle of View 34.3 - 12.3 degrees
  
• Number of Diaphragm Blades 9 Blades
  
• Minimum Aperture F22
  
• Minimum Focusing Distance 140cm
  
• Maximum Magnification 1:8
  
• Filter Size 77mm
  
• Dimensions Diameter 86.4mm X Length 197mm
  
• Weight 1430g
  
  
  

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