Sharp enough, shows little linear distortion for a wide lens

Started Nov 26, 2013 | User reviews thread
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Eduardo del Solar
Eduardo del Solar Senior Member • Posts: 1,971
Sharp enough, shows little linear distortion for a wide lens

Works great on 5DII.  My 17-40, an OK lens, has significant linear distortion at the wide range. The Sigma is one or two steps up in this regard even at the 12 mm range. Wide corners at the 17mm are sharper in the Sigma (based on testing 4 Sigma copies) compared to my 17-40. The Sigma has nice construction, fast AF, takes fairly sharp images (vis a vis the 17-40) at 12mm up to 24mm.

Unlike some of my other wide lenses, this lens seems to take more light, thus I find underexposing by two stops gives me better skies. One of the copies I tested was defective on one corner, the other had overall softness from the 12-20mm range. Quality control, however, is not better on the Canon 17-40 based on my experience.  Overall, I am quite pleased with this purchase.

Here are a few images with this lens, mostly at the 12mm many showing linear distortion is well corrected for a lens of this type.

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 Eduardo del Solar's gear list:Eduardo del Solar's gear list
Canon EOS 7D Mark II Sony a7 III Sony a6600 Canon EOS R6 Canon EF 600mm f/4.0L IS II USM +12 more
Sigma 12-24mm F4.5-5.6 EX DG Aspherical HSM
Wideangle zoom lens • Canon EF, Pentax KAF, Sony/Minolta Alpha, Sigma SA Bayonet, Nikon F (FX)
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Canon EOS 5D Mark II Sigma 12-24mm F4.5-5.6 EX DG Aspherical HSM
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