Black Line on Photos at high Shutter - Canon Community

Got this new canon5d markiv on amazon and sometimes at high shutter speed it gives a distinct black line in between the photos. is this ok at high shutter speed assuming light not passing through? but should it not darken all the image instead of just one black strip? shutter speed 1/1600 f7.1 iso400 https://www.flickr.com/photos/156126577@N03/39992084913/in/pool-canondslr/ shutter speed 1/300 f7.1 iso400 works fine https://www.flickr.com/photos/156126577@N03/46042557115/in/dateposted-public/ ‎02-02-2019 06:06 AM Difficult to tell what's happening from the pics because it seems to be a spinning subject, can you make it do it again if you take pictures of a static subject in daylight without using flash or artificial light and then post that on here. ‎02-02-2019 10:25 AM Out of curiosity ... what is the subject in the photo? The black band isn’t a digital artifact ...so this does not appear to be a camera defect. However... due to the way the camera is designed to work at high speed, yo

Got this new canon5d markiv on amazon and sometimes at high shutter speed it gives a distinct black line in between the photos. is this ok at high shutter speed assuming light not passing through? but should it not darken all the image instead of just one black strip? shutter speed 1/1600 f7.1 iso400 https://www.flickr.com/photos/156126577@N03/39992084913/in/pool-canondslr/ shutter speed 1/300 f7.1 iso400 works fine https://www.flickr.com/photos/156126577@N03/46042557115/in/dateposted-public/ ‎02-02-2019 06:06 AM Difficult to tell what's happening from the pics because it seems to be a spinnin