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Message: <blockquote data-quote="hark" data-source="post: 764497" data-attributes="member: 13196"><p>When I was out testing this lens again today, I noticed something. I hold the back button (only using the center focus point as single point focus), and press the shutter button. As the camera takes the image, immediately before the mirror closes in the viewfinder, I see the image jumping slightly within the frame - making my subject no longer exactly in the center. And since I have the focus point enabled on my rear screen, quite often the focus point isn't on top of my subject because of the image moving. And that is more of a VR issue than anything. And it's possible with me holding down the back button, the camera might refocus in that moment and focus on whatever the focus point lands on. I'll see if I can take a photo of the rear display showing how the focus point is no longer on a subject. At least that might be one reason.</p></blockquote><p></p>