I can only confirm the other comments regarding the Canon EF
17-40L f/4 which I also find an excellent lens and I am 100% happy with it. However, I am looking for an addition to my lens-collection which is even wider and am seriously considering the Sigma EX 12-24. As I want to use the lens on both DSLR as well as analog SLR the Canon EF
-S 10-22 is no option for me. Does anyone have experience with the Sigma 12-24? Can you recommend it?
Thanks for any info! Cheers,
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