The Sigma 17-50mm f2.8 EX DC OS HSM is a compact large aperture standard zoom lens equipped with optical stabilisation. This large aperture standard zoom lens is designed for digital SLR cameras with APS-C size sensors. Two FLD (“F” Low Dispersion) glass elements, plus two glass mold and one hybrid aspherical lens, provide excellent correction for all type of aberrations. The inner focusing system eliminates front lens rotation, making the Sigma 17-50mm f2.8 particularly suitable for use with the supplied petal-type lens hood and circular polarising filters.
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Key Features:
• OS (Optical Stabilizer)
• Two FLD (“F” Low Dispersion) glass elements
• Super Multi-Layer Coating reduces flare and ghost
• HSM (Hyper Sonic Motor)
• inner focusing system
Specifications:
Focal length: 17-50mm
Maximum aperture: f/2.8
Minimum aperture: f/22Lens construction:
• 13 groups 17 elements
• 2 FLD glass elementsAngle of view: 72.4°-27.9°
Closest focus distance: 28cm / 11in
Maximum reproduction ratio: 1:5
Aperture blades: 7 (rounded)Filter attachment size: 77 mm
AF motor: HSM motor
Dimensions: 83.5mm x 91.8.8mm (3.3in × 3.6in)
Weight: TBC
Supplied accessories:
• Case
• Petal-type Hood (LH825-03)Mounts: Sigma, Sony, Nikon, Pentax, Canon