Sigma 17-70mm f/2.8-4 DC Macro OS HSM Lens ( Art Version ) for Pentax

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Item: 319815
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Sigma 17-70mm f/2.8 - 4 Contemporary DC MACRO HSM for Pentax

The 17-70mm F2.8-4 DC Macro HSM is the first lens in the Contemporary line of Sigma’s Global Vision. The Sigma 17-70mm F2.8-4 was designed to be the ideal all-purpose lens for APS-C DSLRs. With a versatile focal length and macro capability, the 17-70mm F2.8-4 is also equipped with a Hyper Sonic Motor (HSM) for superior image quality and ensures quiet, accurate, and fast autofocusing. The design of the 17-70mm includes state-of-the-art TSC material (Thermally Stable Composite), which allows for a durable construction as well a reduction in size by 30% compared to conventional models. Two FLD glass elements (with performance equal to fluorite) are incorporated along with one SLD element to reduce color aberration at the highest degree and obtain unmatched image quality. The 17-70mm F2.8-4 Macro DC HSM is compatible with the Sigma USB dock for an increased level of customization, including firmware updates as well as focus parameter adjustment changes. The perfect all-purpose travel lens, the 17-70mm F2.8 Macro DC HSM is a must have for any camera bag.

ASP – Aspherical

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

C - Contemporary lens

This lens is part of the Contemporary category of Sigma's Global Vision. Sigma's Contemporary lenses combine modern techniques and materials in order to deliver a concept which combines a streamlined, lightweight construction with best-in-class optical quality and performance.  This compact lens is one you trust for a variety of everyday applications.

DC – DC for Digital

These are special lenses designed for APS-C size sensors 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!

HSM - Quiet and Fast Autofocusing

HSM lenses employ a motor powered by ultrasonic waves that produce a quiet, yet high-speed AutoFocus. You can enjoy high performance with low noise in a variety of shooting situations.

IF – Inner Focus

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

Smooth Zooming

The specially designed cam makes possible smooth and rhythmical zooming, allowing photographers to find the right focus instantly and shoot with perfect timing.

True Macro Photography

Being able to shoot close to the subject is a crucial element in photography. This lens features a minimum focusing distance of 22cm and a maximum magnification ratio of 1:2.8, producing results that rival those of macro lenses. At 70mm, its working distance is 5.52cm. When used as a telephoto lens, it's so close to a dedicated macro lens in performance the lens hood seems to touch the subject. Since its range extends from the 35mm equivalent of 25.5mm to 105mm, the lens is perfect for shooting close-ups of fashion accessories, cuisine, flower arrangements and much more. Uncompromising in every aspect of lens design, SIGMA has even chosen not to place the product name on the front of the lens to prevent reflection of the letters during close-up photography.


  • Filter Thread: 72mm
  • Dimensions (D x L): 3.11 x 3.23-inches
  • Weight: 16.4 ounces 

Lens Performance

  • Focal Length: 17 - 70mm
  • Aperture: f/2.8 to 4 - f/22
  • Camera Mount Type: Pentax K
  • Format Compatibility: DSLR (APS-C Sensor)
  • Lens Construction: 16 elements in 14 groups
  • Angle of View: 79.7 - 22.9 degrees
  • Maximum Magnifications: 1:2.8
  • Number of Diaphragm Blades: 7 (Rounded diaphragm)
  • Minimum Focusing Distance: 8.6-inches


  • Autofocus: Yes

• Lens Hood LH780-03
• Front Lens Cap
• Rear Lens Cap