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My DSLR is having an issue. What's the cause of this black thing on taking pictures? What solution probably can I do? Please help. Thanks.

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    Are you using flash? What is your shutter time? – Michael C Feb 4 '17 at 9:36
  • I'm voting to close the question as too unclear – Janardan S Feb 4 '17 at 12:04
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    Why are you posting a photo of your camera instead of the actual photo with the problem? Is this only visible on the cameras lcd screen? – ths Feb 4 '17 at 13:42
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It is a failing shutter.

http://digital-photography-school.com/wp-content/uploads/2009/03/shutteranimation2.gif

If one of the curtains (or the mirror which blocks the light too) is moving badly you will get this problem (unless you are using flash of course which does not seem to be the case).

Unless you want to take a risk of replacing the shutter yourself take it to the service. In the best case it would only require cleaning the shutter but do not count on it.

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    It could also be using a Tv shorter than X-sync with a flash. The shutter could be perfectly fine. – Michael C Feb 4 '17 at 13:36
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    I agree it's probably a failing shutter. But your animation is very wrong. (The curtains move in the same direction. Your mechanical arrangement has no way to generate a shutter speed faster than the sync speed.) And yeah, you could be busting X-Sync, but cameras mostly make that impossible with flashes built for that system. – Roger Krueger Feb 4 '17 at 23:27
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    Unless I'm missing something, the curtains are moving in the same direction during the exposure portion of that animation. They just happen to both be fully open at the same time, which is not necessarily the case. – dgatwood Feb 5 '17 at 4:35
  • @RogerKrueger the curtains are moving in the same direction right before and right after exposure. This is not even my animation. – Euri Pinhollow Feb 5 '17 at 18:51
  • @MichaelClark of course it could be sync issue and that's why I mentioned it. However after years of photography I can clearly see that there is no popup flash used for taking the OP photograph (deep shadows in front of objects) and it is not bounced flash either (check out reflections on the sofa which tell that the most powerful source of light is not on the camera at all). Those who downvoted do not get it. – Euri Pinhollow Feb 5 '17 at 18:53

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