Sigma APO 120-400mm zoom lens - Hyper sonic motor
The minimum focusing distance of 150cm (59.1”) throughout the entire zoom range and has a maximum magnification of 1:4.2 make it useful for close-up photography. This lens incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed AF as well as full-time manual focusing capability. The addition of the optical 1.4x EX DG APO or 2x EX DG APO Tele Converters produce a 168-560mm F6.3-8 MF ultra-telephoto zoom lens or a 240-800mm F9-11 MF ultra-telephoto zoom lens respectively.
Sigma APO 120-400mm F4.5-5.6 DG OS HSM - Features
● Three SLD glass elements and a rear focus system provide optimum image quality
● Super multi-layer coating reduces flare and ghosting
● The minimum focusing distance of 150cm (59.1”) makes it useful for close-up photography
● HSM ensures quiet and high speed autofocus
● Compatible with Sigma’s APO Tele Converters
● Sigma OS (Optical Stabilizer) function
Sigma APO 120-400mm DG OS HSM lens - Specifications
● Lens Construction 15 groups 21 elements
● Maximum Magnification 1:4.2
● Angle of view 20.4°-6.2°
● Filter Size Φ77mm
● Number of blades 9pcs
● Lens Hood Bayonet type
● Minimum aperture (W) F22
● Dimensions Φ92.5mm×203.5mm / 3.6in.×8in.
● Minimum Focusing Distance 150cm / 59.1in
● Weight 1,750g / 61.7oz.
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Sigma APO 120-400mm telephoto zoom lens : Sigma is pleased to announce the launch of the Sigma APO 120-400mm F4.5-5.6 DG OS HSM. The Sigma APO 120-400mm telephoto zoom lens incorporates Sigma’s original OS (Optical Stabilizer). It offers the equivalent of using a shutter speed approximately 4 stops faster. Three SLD (Special Low Dispersion) glass elements provide excellent correction for chromatic aberration. The Sigma telephoto zoom lens is equipped with the rear focus system that minimizes fluctuation of aberration caused by focusing. It provides optimum image quality throughout the entire zoom range. The super multi-layer lens coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range. 
