Great, but there is a but...

Started Sep 28, 2019 | User reviews thread
AnthonyL Veteran Member • Posts: 3,533
Re: Great, but there is a but...

47872Mike wrote:

This review relates only to my use of the lens on a 6D full-frame camera.
Sharpness and contrast are excellent right from f2.8, with the exception of very extreme corners. It's well-made and doesn't have that annoying play found in the focusing mechanism of many cheaper Canons, so it is capable of focusing consistently where the camera wants it to...unlike, for example, the 50/1.8 II I used.
It doesn't acquire focus particularly quickly, but it isn't slow enough for that to be a massive issue.
What is looking like it might be a massive issue is the curved field. Not because in itself it affects most real-world images (although it does presumably contribute to the unsharpness of extreme corners), but specifically because if you use centre focus and recompose, as many 6D owners do, you are likely to get a lot of very blurred shots.

Are you sure that this is down to lens design and not due to the distance to subject changing when recomposing?

eg: https://fstoppers.com/education/heres-why-focusing-and-recomposing-photographs-fails-168567

 AnthonyL's gear list:AnthonyL's gear list
Canon EOS 700D Canon EF-S 10-22mm F3.5-4.5 USM Canon EF-S 55-250mm f/4-5.6 IS Canon EF 40mm f/2.8 STM Canon EF-S 18-55mm f/3.5-5.6 IS STM +5 more
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