Sigma Lenses

Bob mentioned to me that Sigma has some good alternative lenses to Canon, the folks at “Lightrules”: have some reviews of these lenses comparing them with Canon. Interesting results , but as Bob also mentioned, quality control is much nore of a factor with these lenses, so caveat emptor

* “Sigma 24-70 F2.8 EX DG”: This is comparable to the very good Canon 24-70 L, but it costs $365 vs. $600 for the 24-70.

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