Απάντηση: Canon ef 11-24mm f/4 L η Canon ef 16-35mm f/2.8 L ΜκΙΙΙ
https://www.lensrentals.com/blog/2017/08/sony-fe-16-35mm-f2-8-gm-sharpness-tests
The Canon 16-35mm f/2.8L Mk III is arguably the best 16-35mm f/2.8 lens, and therefore we consider it the standard at this focal length.
16mm
The Canon has an amazingly high resolution right in the center, especially at higher frequencies where the difference between it and the Sony is dramatic. But the Sony’s smooth curves give it better resolution in the outer half of the image, and the Sony has less sag-tan separation (this can be caused by either astigmatism or lateral color) so it’s likely to have a smoother look and could have smoother bokeh (lots of other factors contribute to bokeh).
As an aside, I’ll use this as a good example of why single-number ratings are so silly. If you weight the center of the image, the Canon’s going to have a higher rating. If you rate the entire image evenly, they’re going to be pretty equal. If you rate astigmatism as a huge problem, the Sony will have a better rating. My non-numeric rating is they are both excellent, but I expect they’ll have a very different look, and different people will prefer one over the other.
24mm
At 24mm center resolution is pretty equal. Throughout most of the image the Canon maintains slightly better resolution, although it drops off at the edges.
35mm
The 35mm the Canon has a bit better resolution through most of the image, and the sagittal-tangential difference is now clearly better on the Canon. They’re both good though, and this is not a huge difference by any means. As I mentioned earlier, if you’re carrying a 24-70mm f/2.8 lens you’ll find it’s slightly better at 35mm than either of these, but both are still very acceptable.
Conclusion
The Sony 16-35mm f/2.8 GM lens is an excellent optic at 16mm and 24mm. If you want to shoot wide at f/2.8 on an FE mount camera it’s probably the optic of choice. It’s not better or worse than the Canon 16-35mm f/2.8L Mk III, it’s different, and some people will certainly like it’s look better.