70D Dark spot corner of image at high shutter speeds

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Williamsonj New Member • Posts: 5
70D Dark spot corner of image at high shutter speeds

I've recently started having an issue with my 70D where I'm getting a dark patch in the bottom left corner of the image. It's a bit intermittent, it's not the lens hood and it happens with different lenses. It seems to happen at faster shutter speeds with the same aperture. For example I took 5 pictures of the same thing 1/1250 f4 , 1/1250 f3.5 and 1/1250 f7.1 all had it, 1/100 f 3.5 and 1/160 f20 did not (see images below, in order they are 1/1250 f4 - 1/1250 f3.5 - 1/100 f 3.5 - 1/1250 f7.1 - 1/160 f20)

If anyone has any ideas it would be much appreciated!

Canon EOS 70D
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