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Sigma 17-70mm F2.8-4.5 DC Macro OS for Canon

Optical Characteristics

With a 35mm equivalent focal length range of 27-112mm, this lens offers a wide to short telephoto perspective.

Macro Lenses

True macro lenses have a magnification ratio of 1:1/ maximum maginification number of 1 or higher

Recommended Applications

*Recommendations are based only on the features necessary to perform the application successfully and do not take into account the relative image quality of different lenses

General use

A basic kit for non-specific photography should cover between 28-300mm

Portraits

Portraits are best shot with focal lengths between 85 and 300mm depending on whether shooting mid-length or close-ups and the amount spacial compression wanted. Depth of field is the most important tool to manipulate and a fast lens will give more scope for creative treatment.

Fashion

Fashion is difficult to define but requires focal lengths of between 28-200mm. Very often capturing movement, a fast focus ultrasonic lens is important.

Technologies

ASP (Aspherical Lens)

The aspherical lens complex allows freedom of design, improved performance, a reduced number of component lenses and a compact size.

HSM (Hyper-Sonic Motor)

This lens uses a motor driven by ultrasonic waves to provide a quiet, highspeed AF.

IF (Inner Focus)

To ensure stability in focusing, this lens moves the inner lens group or groups without changing the lens' physical length.

DC (DC Lens)

These are special lenses designed so that the image circle matches the smaller size of the image sensor of most digital SLR cameras. Their specialized design gives these lenses the ideal properties for digital cameras, the compact and lightweight construction is an added bonus ! including compact and lightweight construction.

Specifications

35mm equivalent focal length range: 27-112mm
Lens perspective: Wide to short telephoto
Minimum aperture: f22
Image stabilisation: Lens stabilisation
Hyper-Sonic motor: Yes
Special lens elements: 2 aspherical and 1 SLD glass
Filter size: 72mm
Weight: 490g
Dimensions: 79 x 82.5
Maximum magnification: 1:2.3
Recommended applications: General use, Portraits, Fashion

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