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.
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.
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.
This lens has a rounded 9 blade diaphragm which creates an attractive bokeh to the out of focus area.
Hood Adapter HA850-01 (Supplied)
Hood adapter extends the length of the lens hood and provides more effective shading when used with digital cameras with an APS-C size images sensor.
Maximum aperture: 2.8.
Minimum aperture: 22.
Lens Construction: 17 groups, 22 elements.
Blades in Diaphragm: 9.
Angle of View: 34.3-12.3 degrees.
Minimum Focusing Distance: 140cm.
Dimensions (Length x Diameter): 197mm x 86.4mm.
Filter size: 77mm.