New Canon 6D, potential shutter issue, opinion needed

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lighthunter80
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New Canon 6D, potential shutter issue, opinion needed
3 months ago

I got my brand new 6D last Thursday and had now some time to test it out. I went here in Sydney to the "Winter Wonder Land" after 5pm so it was already dark. I took some pictures of a light installation and found something I never saw with my 5d2 before.

When I shoot at high shutter speeds many images seem to show a shadow from the shutter. The first example was one of the few where the image looked fine. Then I took a series of about 10 more and almost all of them showed this shadow (see below).

1/2000s | f2.8 | ISO1600

1/2000s | f3.5 | ISO1600

1/2000s | f3.2 | ISO1600

1/2000s | f2.8 | ISO1600

I did some tests with much slower shutter speeds like 1/320 or 1/200 and lower ISO and they all were fine. So my theory is that the lights installed 'blink' at a specific frequency like 60hz and with my super fast shutter speeds I simply didn't sync the shutter with the light source frequency. Only longer exposures have enough time to render a fully exposed picture without this half dark frame (?).

I then went back to the train and shot some fast shutter speeds there just to check if I can replicate it. I shot at least 20 images at 1/4000 and ISO6400 but I could not a single time replicate the problem. See below one example (I could add many more but they all looked fine).

1/4000s | f1.4 | ISO6400

Could it be that in the train station are so many different light sources that they all mix up to a very homogeneous light source that would not show the effect from above caused by the flickering frequency?

Again, art slower shutter speeds I have never seen any problem. Pretty much only high shutter speeds and artificial light causes my problem. I haven't noticed this ever with my 5D2 but perhaps simple because I never shot it with 1/2000 at night.... now the 6D has such good high ISO capabilities that lets me choose these ludicrous settings.

Please let me know your opinion if I should let my cam check or if the described above is within normal behaviour.

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Canon EOS 5D Mark II Canon EOS 6D Olympus PEN E-P5 Canon EF 16-35mm f/2.8L II USM Canon EF 70-200mm f/2.8L IS II USM +7 more
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Canon EOS 5D Mark II Canon EOS 6D
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