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Sigma DC C 17-70 mm f/ 2.8-4 Macro OS HSM Lens

Pictures

Sigma DC C 17-70 mm f/ 2.8-4 Macro OS HSM lens

Sigma DC C 17-70 mm f/ 2.8-4 Macro OS HSM lens

Sigma DC C 17-70 mm f/ 2.8-4 Macro OS HSM lens

Sigma DC C 17-70 mm f/ 2.8-4 Macro OS HSM lens

MTF-charts

Sigma DC C 17-70 mm f/ 2.8-4 Macro OS HSM MTF Chart

Optical design

Sigma DC C 17-70 mm f/ 2.8-4 Macro OS HSM optical design

Format: APS-C (crop)

Type: Zoom lens

Focusing: Auto Focus (AF)

Lens mounts: Canon EF, EF-S, Sony A / Minolta A, Nikon F (FX, DX), Pentax K, Sigma SA

First year of production: 2012

Optical design: 16 elements in 14 groups (3AS+1SLD+2FLD)

Features: Ultra-Sonic Motor, Optical stabilisation
User reviews (0)

Photos (11)

Tests (0)

Owners (2)

Views (9987)

Average price: $410

Specifications:

Focal lengthMax. apertureMin. apertureBladesMin. Focus (m.)Filter Ø (mm.)Weight (gr/oz)Length (mm/in)
17mm - 70mmf/2.8 - f/4.0f/2270.2272470/16,682/3,2

Additional information:
  • Equivalent focal length: 25-105 mm
  • Angle of view: 79.7 - 22.9°
  • Diameter: 79 mm
  • Max. magnification: 1:2.8
  • Working distance: 55 mm (focal length - 70 mm)
  • HSM is evidently NON-ring-type!
  • Brass bayonet mount
  • Price: $ 500

The Sigma C 17-70mm F2.8-4 DC MacroOS HSM  is a standard zoom lens for digital SLR APS-C cameras. This is the first lens in Sigma's new-concept 'Contemporary' series.

It should not be confused with the identically-named lens released in 2010. This new lens is slightly smaller and lighter. It features a revised optical formula and new design marked ©.

The optical scheme comprises 16 elements in 14 groups, including three aspherical elements (including biconvex), one SLD and two FLD elements (with optical properties close to fluorite). Super multicoating reduces flare and ghosting, and provides sharp and high-contrast images even in backlit conditions.

The lens is equipped with an optical stabilizer claiming a 4-stop benefit. The OS efficiency decreases when used in macro mode. OS is not available for the Sony and Pentax mount.

It is the first time when Sigma has preferred Thermally Stable Composite, which is exceptionally hard and less prone to thermal contraction, to regular polycarbonate for its new lens series.  TSC has similar thermal expansion to aluminum. As compared to regular polycarbonate, containing 20 or 30% of glass, TSC  is meant to have approximately 70 or 25%.  Correspondingly, it is 25% more flexible and resilient than polycarbonate.

USB Dock Station+ Sigma Optimization PRO Software is available for updating the lens firmware and adjusting its parameters (including focus).

LH780-03 petal hood included


Links to online resources:
PDF Files:
Posted by: fiy94yan   Date of publication: 18.09.2012



Photos taken with this lens Sigma DC C 17-70 mm f/ 2.8-4 Macro OS HSM:


Бабье лето .
Autor: fiy94yan
4.33 0 2891

Коробковка .
Autor: fiy94yan
3.78 1 2669

цветы
Autor: fiy94yan
3.67 2 891

пятерочка
Autor: fiy94yan
2.6 0 831

Mechanical quality4.508
Optical quality4.768
Usability4.727
Pricing / Value4.628
Bokeh4.768
Overall lens rating
4.67

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