Overview: The Sigma 17-70mm F2.8-4 DC HSM Macro (Model #884) is a
high quality wide angle zoom and macro lens. It is the first lens in the
Contemporary line of Sigma's Global Vision. Typical uses include closeup
photography, travel, weddings &
events, and family photography. The
lens has the Canon EF-mount, and comes with a lens hood, and front and rear caps.
Sigma DC Lenses: This Sigma DC lens is designed for use with
digital SLRs with APS-C-sized image sensors. The image circle matches the
smaller size of the image sensor of most digital cameras.
Construction: The lens is made of durable TSC (Thermally
Stable Composite), which allows the lens size to be reduced by approximately
30%, compared to conventional models.
Optics: The lens features 16 elements in 14 groups,
including two FLD glass elements, with performance equal to fluorite, and one
SLD element to reduce color aberration and superb image quality.
Lens Hood: The lens includes a bayonet-type
detachable lens hood to help
prevent stray light from entering the lens, causing flare, and to protect the
lens from rain, snow, and dust. When not in use, the lens hood can be inverted
and mounted onto the lens backwards for storage. The lens hood adds
approximately 1" to the overall length of the lens when mounted.
HSM: The lens has a hyper-sonic motor (HSM) that provides a
quiet, high-speed auto focusing mechanism.
Optical Stabilizer (OS): The 17-70mm lens has an Optical
Stabilizer, which compensates for camera shake when shooting handheld. The
Optical Stabilizer can be turned on/off with a two-way switch on the lens
Focus Mode Switch: The lens features a two-way switch for
setting the focus mode: AF (auto focus) or M (manual focus). Even in AF mode,
you can focus manually by rotating the focus ring.
Firmware Updates: With the optional Sigma USB dock (sold
separately by the manufacturer), you can update the lens firmware via USB. In
addition, you can adjust the focus parameters with an online update.
- Lens Construction: 16 Elements in 14 Groups
- Angle of View: 79.7°-22.9°
- Number of Diaphragm Blades: 7 (rounded)
- Maximum Aperture: f/2.8 (W) - f/4 (T)
- Minimum Aperture: f/22 (W-T)
- Minimum Focusing Distance: 8.6"
- Filter Size: 72mm
- Maximum Magnifications: 1:2.9
- Dimensions: Diameter 3.111", Length=3.469"-5.082" (4.006"-5.583" w/lens
- Weight: 16.4 ounces
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