With the release of the new 35mm f/1.4L II USM, however, Canon appears to be taking direct aim at Sigma. to the EF 16-35mm f/2.8L II, along came the Tamron with a lower price, great sharpness
The Canon EF 35mm f/1.4 USM L II is certainly an improvement over its predecessor but it's not a new world wonder either. Resolution-wise it is tack sharp in the image center. At f/2-f/2.8 it is pushing the 50mp sensor of Canon EOS 5Ds R to its limits. However, the borders aren't quite so hot especially at large apertures.
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