|DC||The lens is designed only for APS-C digital cameras.|
|OS||The lens is equipped with optical image stabilizer. The stabilizer allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without stabilizer you will have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.|
|HSM||The lens is equipped with ultrasonic motor to provide very fast and virtually silent autofocus. Learn more|
|MACRO||A lens with better close-up focusing capabilities in comparison with traditional lenses. Not a macro lens though.|
|| C||Belongs to Contemporary series lenses.|
|Position in the lineup|
|Sigma 17-70mm F/2.8-4 DC Macro OS HSM | C||Sep 2012||⊗|
|Sigma 17-70mm F/2.8-4 DC Macro OS HSM||Dec 2009||⊗|
|Sigma 17-70mm F/2.8-4.5 DC Macro||Jan 2006||⊗|
|Diagonal angle of view:||77.3°-22° (Canon APS-C)
|79.5°-22.8° (Sony APS-C)
|79.5°-22.8° (Nikon APS-C)
|79.5°-22.8° (Pentax APS-C)
|72.3°-20.1° (Sigma APS-C)
|Lens construction:||16 elements in 14 groups, including:|
|Number of blades:||7|
|Closest focusing distance:||22 cm|
|Type of autofocus motor:||Hyper Sonic Motor (Canon EF)|
|Hyper Sonic Motor (Minolta/Sony A)|
|Hyper Sonic Motor (Nikon F)|
|Hyper Sonic Motor (Pentax K)|
|Hyper Sonic Motor (Sigma SA)|
|Full-Time Manual Focus:||No|
|Image stabilizer:||Canon EF|
|Stabilizer features:||Mode 1|
|Stabilizer efficiency:||up to 4 stops|
|Weight:||SA: 465 g|
|Maximum diameter x Length:||SA: Ø79 x 82 mm|
|Materials:||High-quality plastic barrel (TSC)|
|Filter size:||72 mm|
Design and Features
For information on history of Sigma and development of Sigma Global Vision line please refer to the article dedicated to Sigma 35mm F/1.4 DG HSM | A.
The lens barrel is of moderate weight, made of high-quality plastic (TSC). The lens mount is metallic. Please refer to the article dedicated to Sigma 35mm F/1.4 DG HSM | A for more information about TSC. In terms of build quality and design Sigma Global Vision line is a new direction for the company: cosmetically the lens differs from the earlier models and looks attractive.
The lens features a zoom lock lever to keep the zoom ring fixed at the shortest focal length of 17 mm. This function is convenient for carrying a camera with the lens on a strap because it prevents the lens from extending.
The lens features AF/MF focus mode switch.
|AF||Autofocus mode without Full-Time Manual Focus.|
|MF||Manual focus mode.|
The lens uses front filters with standard size of 72 mm which are easy to find. However, filters of such size are more expensive and mainly used with professional lenses.
The focusing ring rotates during autofocus which looks pretty anachronistic by today's standards. It is strongly recommended not to touch the ring or manually stop its movement because it might result in damage to the lens and/or camera.
The lens is compatible with Sigma USB dock, an optional accessory which allows to connect the lens to a computer and customize its operation via Sigma Optimization Pro software. The customization for this lens includes updates of firmware via the Internet, autofocus microadjustments for 4 focal lengths and 4 shooting distances and setting the amount of rotation of the focusing ring which triggers FTM focusing.
Sigma also offers paid Mount Conversion Service (MCS) for this lens. With MCS, the mount of the lens can be converted to Canon EF, Nikon F, Pentax K, Sony A or Sigma SA. Teleconverters, USB docks and other accessories for this lens are not eligible for MCS.
Versions of the lens for Canon EF, Nikon F и Sigma SA mounts feature optical image stabilizer, which, according to the manufacturer, compensates up to 4 stops of shutter speed. Theoretically it allows to capture sharp images of static subjects at shutter speeds down to 1/4 second at focal length of 70 mm*).
*) without the need to increase ISO sensitivity and/or use a tripod, at the same lighting conditions and at the same aperture
The image stabilizer does not have any specialized mode of operation and is not capable of automatic detection of panning.
Pentax users are suffering from blurred images when the company’s 17-70mm f/2.8-4 DC Macro HSM Contemporary lens is used on Pentax DSLR bodies with in-camera image stabilization activated. Owners of the Sigma USB Dock will be able to update the firmware themselves, but those without the dock will need to take their lens to an authorized distributor. The problem seems to be a result of the lens not passing on focal length information to the camera’s Shake Reduction system accurately, so that when the lens is used at wider focal lengths the camera works to stabilize for a longer focal length – thus introducing blur via the over-active sensor movement.
|Camera:||Canon EOS 50D|
|Sensor size:||22.3×14.9 mm|
|Distortion at 17 mm:||-3.28 %|
|Distortion at 70 mm:||+0.99 %|
|Vignetting at 17 mm F/2.8:||-1.15 EV|
|Vignetting at 70 mm F/4.0:||-0.90 EV|
|Efficiency of Image Stabilizer:||up to 3 stops|
|Sensor size:||23.6×15.6 mm|
|Distortion at 17 mm:||-3.1 %|
|Distortion at 70 mm:||+1 %|
|Vignetting at 17 mm F/2.8:||-1.2 EV|
|Vignetting at 70 mm F/4.0:||-0.85 EV|
|User Manual. Multilingual, Adobe PDF, 2 MB|
Alternatives (AF, 14-79 mm)
|Sigma 17-70mm F/2.8-4 DC Macro OS HSM||2009||⊗|
|Sigma 17-70mm F/2.8-4.5 DC Macro||2006||⊗|