Sigma 17-70mm f/2.8-4 DC Macro HSM Contemporary Lens
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Overview:
Mixing a useful zoom range with a sophisticated design, Sigma 17-70mm f/2.8-4 DC Macro 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. 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.
- As part of the Contemporary line within Sigma's Global Vision series, this lens is designed to achieve a balance between convenience and performance, and meshes a compact, lightweight build and versatile handling with notable optical attributes.
- Wide-angle to short-telephoto zoom is designed for APS-C-format Sony A-mount cameras and provides a 25.5-105mm equivalent focal length range.
- Bright f/2.8-4 maximum aperture range is suitable for working in available light conditions and also benefits depth of field control for isolating subject matter.
- One Special Low Dispersion (SLD) and two F Low Dispersion (FLD) elements are featured in the optical design and help to reduce color fringing and chromatic aberrations for improved clarity and color accuracy.
- Three aspherical elements are used to help limit distortion and spherical aberrations and also contribute to greater overall sharpness and accurate rendering.
- A Super Multi-Layer Coating has been applied to lens elements in order to minimize lens flare and ghosting and contribute to producing contrast-rich and color-neutral imagery, even in backlit conditions.
- Ideal for close-up shooting, this lens offers a 1:2.8 maximum magnification along with a minimum focusing distance of 8.7" to suit working with nearby subjects.
- Integrated HSM (Hyper Sonic Motor), along with a rear focus system, realizes quick and quiet autofocus, which is further complemented by an optimized AF algorithm to produce smoother focusing performance. The HSM also permits full-time manual focus control simply by rotating the focus ring at any time.
- Rounded seven-blade diaphragm contributes to a smooth and pleasing bokeh quality.
- Constructed using a Thermally Stable Composite (TSC) material for greater precision and use in wide temperature variations. Additionally, a brass bayonet affords improved mounting accuracy and rigidity.
- This lens is compatible with the optional Sigma USB Dock for fine-tuning different lens characteristics and updating its firmware.
Technical Specifications:
|
Focal Length |
17 to 70mm (35mm Equivalent Focal Length: 25.5 to 105mm) |
|
Maximum Aperture |
f/2.8 to 4 |
|
Minimum Aperture |
f/22 |
|
Lens Mount |
Canon EF/Nikon F/Pentax K/Sigma SA/Sony A |
|
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 |
None |
|
Filter Size |
72 mm (Front) |
|
Dimensions (ø x L) |
3.11 x 3.23" / 79 x 82 mm |
|
Weight |
1.02 lb / 465 g |
Packaging Info:
|
Package Weight |
0.8 kg |
|
Box Dimensions (LxWxH) |
6.1 x 4.35 x 4.2" |
In the Box:
