PetaPixel No, Sigma Did Not Make Canon’s New 10-20mm f/4 L IS STM Lens

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Late last night, Canon introduced a new wide-angle zoom lens -- the 10-20mm f/4 L IS STM -- that is unlike any optic it has ever produced. It's unique, and one publication published a story with quite an incendiary accusation: Canon didn't actually make it, Sigma did.

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