相机不带触屏就是耍牛氓

https://www.dpreview.com/reviews/canon-eos-6d-mark-ii-review/7

Dual Pixel Autofocus
Having seen the results of some of Canon's recent cameras, like the EOS 77D, we were fairly hopeful that the 6D II would turn in a similar performance. Unfortunately, we were sorely disappointed.


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We've found that Dual Pixel can struggle with focus on distant subjects, and the 6D II is no different. It was rare that we began the run with the camera acquiring perfect focus on Dan, and though it was capable of better results once he was closer to the camera, autofocus performance was still inconsistent.

We should note that we ran this straight-on test in the Continuous H burst speed on the 6D II, which the camera refers to as 'speed priority' once you select it in live view. Setting the camera to a Continuous L is described as 'focus priority,' and drops the burst rate significantly. At this point, this exercise is not particularly challenging, even for some of Canon's other DSLRs. But then we had Dan start the weave, and...oh dear.


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Shooting in 'Speed Priority' in live view was just downright bad. As soon as the first turn, the autofocus box would stray off of our rider and just sit somewhere, with the camera occasionally attempting to re-acquire him near the end of the run. This is a setting that's best avoided. However, the slower, 'focus priority' burst setting in live view that we tried next, which drops the burst shooting speed to between one and two frames per second.


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Here we see a much more impressive hit rate, with Dual Pixel taking time to acquire accurate focus as best it can before firing the shutter. Unfortunately, this just isn't very practical for moving subjects: the burst rate averaged 1-2 fps with little consistency, so if you're hoping to capture a burst of images that will allow you to select just the right moment, you're out of luck.