Review Sigma 17-70 mm contemporary

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The Sigma 17-70 mm C is the first Sigma lens to be released in the Contemporary series ("High performance, yet compact and lightweight, true all-round lenses"). Since the first lens sets the tone, our expectations are high. Especially since the first lens in the Sigma Art line, the Sigma 35 mm 1.4 A, proved to be an outstanding lens in every review.
The Sigma 17-70mm F2.8-4 DC MACRO (OS) HSM "C" is a fast standard zoom lens for cameras with an APS-C sensor. It is 30% lighter than the old Sigma 17-70mm lens and it is also very compact. The focal length range, the built-in image stabilization and the large f/2.8-4 aperture make the Sigma 17-70 mm C an interesting option for photographers who want something better than their standard kit lens. This lens is also a faster alternative to the Canon 17-85 mm.

Front

Sigma 17-70/2.8-4 DC Macro (OS) HSM "C" review

Specifications
Sigma 17-70 mm F2.8-4 DC MACRO OS HSM 'C'
Image Stabilization:+
lenses/ groups:16/14
length x diameter:82 / 79
filter size:72
Weight:465
Lens hood:+



Sigma-17-70mm-C-reviewSigma-17-70-construction

 

 

 

 

17mmFOV

Review Sigma 17-70 mm contemporary

With a (just over) 4 times zoom range, you will get very different images without having to change your position. The field of view of this lens is equal to the field of view of a 26-105 mm lens attached to a camera with a full frame sensor, which makes it an ideal travel lens. A lens with a focal length of 17-70 mm is more universal than a lens which goes up to a focal length of 50 mm. For portrait photography, 70 mm is a perfect focal length for a camera with an APS-C sensor.

Sigma-website
USBdock
Informative website: The new Sigma global vison website offers a lot of information about the design of the Sigma 17-70 mm contemporary, including MTF values ​​and graphs showing the amount of vignetting and distortion. Usually the data producers provide on their websites, are based on the calculations used for the lens design. Above you can see graphs illustrating distortion.

USB Dock: For Contemporary, Art and Sports SIGMA lenses there's a USB dock with special developed software that allows you to connect to a PC. Then you can update the firmware, adjust the focus position and other parameters to suit your own preference. At the time of testing, the Sigma USB dock was not yet available.

Construction and autofocus

 
The lens consists of a combination of metal and high quality plastic with a beautiful matte look. The lens mount is made of metal. Left of the lens mount you see a silver circle containing a "C", Contemporary, making this lens easily distinguishable from its predecessor. The lens has switches for AF / MF and image stabilization.
The zoom ring is nicely damped and runs very smoothly. If you zoom to 70 mm, the lens is almost twice as long. The front lens element does not rotate when focusing. Attached to a Canon 650D, autofocus is quick and quiet. Not completely silent, but much quieter than its predecessor.

Sigma-17-70mm-C

Image Stabilization

 
Due to the high resolving power of digital cameras, camera shake can be identified easily on-screen at a 100% magnification. If you're out shooting with a hand-held camera with an APS-C sensor, most photographers need a shutter speed at a 70 mm focal length of at least 1/250 second for a sharp image. Thanks to image stabilization, you can use slower shutter speeds.
For camera brands where image stabilization is not built into the camera (Canon / Nikon / Sigma), the Sigma 17-70mm Contemporary lens has built-in Optical Stabilization. The image stabilization does its job well: For images made ​​without the use of a tripod at a focal length of 65 mm, the sharpness of the images drastically reduces at shutter speeds of 1/50 second or longer. But an image shot with a shutter speed of 1/6 second with the image stabilization switched on, is as sharp as an image shot without image stabilization at a 1/50 second shutter speed. That is a profit of at least 3 stops.
Image-Stabilization

Macro

 
Strictly speaking, the Sigma 17-70 mm "C" is no macro lens, because the imaging ratio of 1:1 is not realized. Still, you can shoot nice close-ups with this lens, since the shortest distance at which you can focus, is only 22 cm. You will be so close to your subject, the chances are great that you will throw a shadow on the subject. macro

Resolution

 

At a focal length of 17 mm, the extreme corners are slightly less sharp than the center. It doesn't make much difference when you stop down. The longer the focal length, the smaller the difference in sharpness between the center and the corners. All in all a good performance.


It would not surprise us that the 18 megapixel test camera, a Canon 650D, is still the limiting factor in terms of sharpness. A Sigma SD1 Merrill has a special Foveon sensor, which provides a higher resolution than the Canon 650D. On the site of Sigma, several Sigma 17-70 mm C sample images, taken with the Sigma 17-70 mm C on an SD1 Merrill, are shown. Here you can appreciate the sharpness of this lens to its fullest.

Resolution

Vignetting

 
With a focal length of 17 mm, the vignetting at full aperture is clearly visible. At f/4 it will depend on your subject whether you will still recognize some vignetting: in photos with a clear blue sky taken with aperture 4 you could recognize it. But in practice, you will usually do not have to worry about vignetting with this lens. Vignetting is easily corrected with software correction, if need arise. Vignetting

Distortion

 

The measured distortion of the Sigma 17-70mm OS 'C' shows the character of a typical standard zoom lens with a relatively large zoom range. The distortion ranges from clear barrel at focal lengths under 24 mm just into pincushion at focal lengths above 50 mm.

 

Sigma delivers beautiful correction profiles to Adobe, which enable you to correct distortion in Lightroom or Photoshop. At the time of this review such a profile was not yet available, but it probably will be after the first update of Lightroom or the ACR converter.

Distortion

Bokeh

 
All-round zoom lenses for cameras with an APS-C sensor usually don't excel with bokeh. With the aperture wide open, this lens produces a relatively quiet background blur / OOF (Out of focus) rendering. A bright light source in the background becomes a beautiful circle, but in the bokeh rings are clearly recognizable. All in all, a marked improvement if you have a kit lens on a camera with an APS-C sensor (or an even smaller sensor), but the bokeh remains less beautiful than the bokeh of a fast lens on a camera with a full frame sensor. 70mmbokeh

Flare

 
The previous version of the Sigma 17-70 mm OS was prone to flare. At this point, the Sigma 17-70 mm Contemporary really improved significantly. Even in the studio, we managed to induce a limited amount of flare only with a bright light shining directly into the lens. No images with ghosts were encountered during the test. Top performance. Flare

Chromatic aberration

 

In order to prevent shifting of colors ("chromatic aberration") as much as possible, Sigma used multiple types of high-quality glass (a-spherical, FLD and SLD). Chromatic aberration is so low at all focal lengths, that in practice you don't have to bother about it. Relatively speaking, the chromatic aberration is - not surprisingly - highest at a focal length of 17mm, but even then you will only see it when you blow up the image up to 300%.

miniCA

Conclusion Sigma 17-70 mm Contemporary review

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See our overview of tested lenses or our overview of tested lenses with a Canon mount to compare the performances of this lens with other lenses.

 

ECWYSIWYG score: This table shows the performance of this lens if you store the files in the camera as jpg, where you have all available in-camera lens corrections applied. This score gives you for this lens/test camera combination: "What you see is what you get".
70
112
7.3
7.2
8.2
8.5
7.0
17
28
6.6
6.7
8.5
7.1
5.6
22
35
7.1
7.0
8.9
8.5
5.9
31
50
8.0
7.4
9.1
8.5
9.4
53
85
7.7
7.4
8.8
8.6
7.5
Overall
Overall
7.3
7.3
8.5
8.2
6.2

Pros

  • Good optical performance
  • Light, compact and fast
  • No flare
  • Very effective built-in image stabilization
  • Attractively priced

Cons

  • Visible barrel distortion below 24 mm
  • Vignetting at 17mm f/2.8
The Sigma 17-70 mm C is the first Sigma lens in the Contemporary series, which Sigma is described by Sigma as: "High performance, yet compact and lightweight, true all-round lenses". If you take a look at the results of our Sigma 17-70 mm C review, this description certainly applies for this lens. This is actually an inexpensive fast all-round zoom lens with high optical quality and a good built-in image stabilization. The visible distortion at focal lengths below 24mm is simply corrected afterwards using software, if necessary. Compared to its predecessor, the Sigma 17-70 mm Contemporary is not only 30% lighter, but also much less prone to flare. The AF is also more silent.
When you are not completely satisfied with the performance of your kit lens, then you should definitely consider buying this lens. In terms of optical performance, the Sigma 17-70 mm f/2.8-4 'C'  proved to be a bit better in our reviews than the more expensive Canon EF-S 17-85mm f/4-5.6 IS USM. And the Sigma lens offers a faster aperture too.
Ivo Freriks
Author: Ivo Freriks
With Camera Review Stuff I hope to make a modest contribution to the pleasure that you get from photography. By testing cameras and lenses in the same way, evluating the results and weighing up the pros and cons, I hope to help you find the right camera or lens.

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  • Ivo

    COM_KOMENTO_COMMENT_IN_REPLY_TO_NAME

    Hi Hans,<br /><br />I really appreciate your contributions and I am very curious about your findings. <br />From what I've heard, the USB dock will arrive in the Netherlands at the and of May. And Sigma's USB dock has many more useful functions than focus adjustments. If you can't wait that long, take a look at the videos made by Sigma America.<br /><br />http://vimeo.com/64665246<br />http://vimeo.com/64678241<br /><br />Regards,<br /><br />Ivo

  • Just forgot. The price and delivery was in UK. And the USB Dock will not be able to work on older lenses, only on C, A and Sport Line lenses. And that`s a paradox, since the new lenses doesn`t seems to need any focus adjustment like the older lenses did.<br /><br />Hans

  • Can we adjust for any front/back focus with the USB Dock if a lens needs it?

  • Hans M. Øvre

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    Yes, you can adjust for front/back focus, if you got a Mac or a PC. Sigma says this about The USB dock:<br />Focus Settings:<br />4 categories of customization for fixed focal lenght. 16 categories of customization for zoom lenses(4 options for focal lenght)x(4 options for shooting distance).<br />Sport Line:<br />AF Speed: 3 adjustment modes.<br />Focus Limiter: Customize autofocus range.<br />OS: 3 adjustment modes.<br />To day I saw that Sigma would start delivery of the USB Dock sometimes in May, With a price of 39.99 pound. Hope this was helpfull. Again: Hopeless english....

  • Ivo

    COM_KOMENTO_COMMENT_IN_REPLY_TO_NAME

    Thanx for your detailed reply. I think your English is better than mine.<br /><br />Apparently I missed photographer's question. I was / am busy testing (among others: Sigma 35 mm ART f/1.4 @ Nikon D800E and the new Nikon 80-400 mm VR, also at a Nikon D800E). <br />Especially large telephoto lenses are difficult to test! <br /><br />I will do my best to report something about the latest version of Sigma Photo Pro 5 software and about the Sigma USB dock, as soon as I can get my hands on a copy.<br /><br />Regards,<br /><br />Ivo

  • How would you compare this lens to the Nikon 24-120 3.5-5.6. I understand the focal lengths are different. I'm referring to sharpness, particuarly edge sharpness.

  • Ivo

    COM_KOMENTO_COMMENT_IN_REPLY_TO_NAME

    Hi Joe,<br /><br />We haven't tested the Nikon 24-120mm, and the Sigma 17-70mm on a Nikon mount, so I'm afraid I can't help you with this question.<br /><br />Regards,<br /><br />Ivo

  • Dear Hans,<br /><br />Thanks for sharing your experiences with us. On the internet a lot of discussion can be found about front focus and back focus. Not only for Sigma / Canon combinations, but for other combinations as well.<br /><br />For the 100+ lenses we tested so far, we didn't observe any serious front or backfocus. It could be that we missed front or backfocus when the MTF was slightly lower than it should be (5 - 10 %). If we do find front focus or back focus, we'll report it.<br /><br />Regards<br /><br />Ivo

  • Hans M. Øvre

    COM_KOMENTO_COMMENT_IN_REPLY_TO_NAME

    Thanks for Your answer! With my Canon EOS 550D, I notice huge frontfocus with my Sigma 150-500 and 105/2.8 macro. Both worked fine after service and focus adjust. :D Also my new Sigma 10/2.8 fisheye had a huge frontfocus problem on 550D, so i bought a used EOS 50D with microadjust to use it on. It works great with a microadjust about +13, but had to be focused manually on 550D. This experiences was my reason to ask of any front or backfocus problems on the new 17-70 lens, cause I don`t want to deal with just another lens with focus problems. I don`t see this problems with my original lenses. The reasons why I found the new Sigma 17-70 interesting was that I need to fill the gap between 40 and 70 mm. in my lens range, and that I need a good standard zoom in my lens park. :P

  • Hello! This seems like an interesting lens, but how about front or back focus problems? I have had three Sigma lenses on my two Canon camera houses, and all of them had a huge front focus problem. A lot of You test people did not tell us about this problem, even if it`s well known behind Canon owners. So come on,- let us know! :-*