Mixing a useful zoom range with a sophisticated design, the Canon EF-mount Sigma 17-70mm f/2.8-4 DC Macro OS HSM is a Contemporary-series lens, also characterized by its compact, lightweight profile. The bright f/2.8-4 maximum aperture range pairs with the wide-angle to short-telephoto zoom range to create an ideal travel and everyday lens. The optical design uses a series of low dispersion and aspherical elements to control color fringing and distortion in order to realize high clarity and sharpness. A Super Multi-Layer Coating has also been applied to suppress flare and surface reflections for improved contrast in bright conditions. Also, this zoom sports a high 1:2.8 maximum magnification and 8.7" minimum focusing distance to suit working with close-up subjects.
In terms of handling, a Hyper Sonic Motor is incorporated in the design to provide fast, quiet, and precise autofocus performance along with full-time manual focus override. An Optical Stabilizer also minimizes the appearance of camera shake for sharper handheld shooting. Additionally, the 17-70mm f/2.8-4 features a rounded seven-blade diaphragm for smooth bokeh quality and it is compatible with the optional USB Dock for fine-tuning focusing characteristics and updating its firmware.
Focal Length | 17 to 70mm (35mm Equivalent Focal Length: 27.2 to 112mm) |
Maximum Aperture | f/2.8 to 4 |
Minimum Aperture | f/22 |
Lens Mount | Canon EF |
Format Compatibility | APS-C |
Angle of View | 79.7° to 22.9° |
Minimum Focus Distance | 8.66" / 22 cm |
Maximum Magnification | 0.36x |
Macro Reproduction Ratio | 1:2.8 |
Optical Design | 16 Elements in 14 Groups |
Diaphragm Blades | 7, Rounded |
Focus Type | Autofocus |
Image Stabilization | Yes |
Filter Size | 72 mm (Front) |
Dimensions (ø x L) | 3.11 x 3.23" / 79 x 82 mm |
Weight | 1.02 lb / 465 g |
Package Weight | 1.405 lb |
Box Dimensions (LxWxH) | 6.05 x 4.2 x 4.15" |