Reviews and Problems with Sigma 10-20mm F4-5.6 EX DC /HSM
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Value for money 8
Picture quality 8
Build quality 8
30 January 2010
Conclusion: The Sigma 10-20mm F4-5.6 EX DC HSM is, on paper at least, a very attractive option for APS-C users looking for an ultra-wideangle zoom. The standout selling points are undoubtedly that 10mm wideangle view and the HSM focusing motor, which when coupled with Sigma's traditionally keen pricing, makes for a compelling overall package.
Pros: Equal widest angle in its class, Very low chromatic aberration, Fast and silent HSM autofocus, Good build quality
Cons: Rather inconsistent sharpness (partially due to curvature of field), Pronounced, complex distortion at 10mm
Summary: Sigma 10-20mm f/4-5.6 EX DC HSM is a great value for your money. The lens is one of the widest zoom lenses for APS-C dSLRs available on the market. Its build quality matches (and some might even claim exceeds) that of a Canon's L lens. Image quality rivals other ultra wide zooms on the market.
Conclusion: With the wide field of view that this lens gives the digital SLR owners that require panoramic style angles, this lens is an answer to their prayers. The performance is excellent and the size and weight is little more than a standard zoom. Aimed at an area where there are no contenders stepping down from the 35mm arena and fulfilling a definite need, Sigma should be onto a winner here.
Pros: Good performance, nudging excellent at the wide end., Ability to use standard filters, Weight, size and handling, Price
Cons: Softish edges in middle of range., Slight pincushion at 20mm end.
Excerpt: The Sigma 10-20mm f/4-5.6 EX DC HSM Lens is a very good quality ultra-wide angle lens with a feature that everyone can love - a relatively affordable price tag. I highly recommend that APS-C sensor format body owners include a 10-20mm (or similar) focal length lens in their kit as such a lens is extremely useful. And the Sigma 10-22mm f/4-5.6 could be a good choice to fill your UWA lens slot in your kit.
Excerpt: With a glance across the spec sheet, the Sigma 10-20mm f/4-5.6 could almost be mistaken for the f/3.5 version. It has the same focal range and features Sigma's Hyper Sonic Motor providing fast and reasonably quiet autofocus as well as functionality on Nikon bodies lacking their own AF motor. Like its cousin, we found the AF to be fairly responsive with only a slight delay while it brought the subject into sharp focus. It was fairly quiet too.
Conclusion: An ultra wideangle lens is, in fact, a must for every landscape or journalistic photography fan. Is the Sigma, presented here, worth our interest then? In our opinion, yes, it is, although its overall score is rather slightly lower than that of the Canon 10-22 mm. The Sigma can boast of better chromatic aberration correction and smaller dimensions but the Canon can offer sharper images, better fastness and a wider focal lengths range.
Cons: very high vignetting in the whole range of focal lengths even on stopping down the aperture,, average image quality at the edge of the field,, slow fastness.
Excerpt: Though this corrected 10-20mm lens from Sigma comes at a relatively cheap price, it doesn't strike you as cheap when you use it. It has a real quality feel, enhanced with the matt finish that's standard with a Sigma EX series lens. The zoom and manual focus rings are virtually identical in size, with the zoom ring placed at the rear of the lens.
Sigma AF 10-20mm f/4-5.6 EX DC HSM - Review / Lab Test Report
28 October 2008
Conclusion: The Sigma AF 10-20mm f/4-5.6 EX DC HSM is a worthy alternative in the ultra-wide arena for APS-C DSLRs. At 10mm it showed some of the highest resolution figures that we've seen so far here whereas at 14mm and 20mm the results are slightly worse than the rest of the gang but still pretty good. On the down-side the lens shows fairly heavy vignetting at large aperture settings.
Sigma AF 10-20mm f/4-5.6 EX DC (Pentax K) - Review / Test Report
27 October 2008
Conclusion: The Sigma AF 10-20mm f/4-5.6 EX DC showed an pretty impressive performance with a few bugs. The resolution characteristic is generally very good to excellent except in the extreme corners at 10mm which are a bit soft at large aperture settings. A weak aspect of the Sigma is very high vignetting at large apertures - to be fair this is relatively normal regarding the extreme ultra-wide focal-length range.