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pierre rochon

"staircase pixellisation"

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I'm working on an image taken yesterday. It's a picture of  a circus big top with yellow and blue stripes. Raw file, 16 bits. Depending of the angle of the stripes (spiral pattern), the junction between blue and yellow is pixellized in a staircase pattern at some places, on all of the four frames I took.  Those artefacts appear in no other image, in fact I've taken many thousands of pictures with my D700 and 24-70 zoom, and it is the first time I see this. I was using a polarizing filter. The pixels are visible in the raw file without sharpening.

 

 

Anybody knows why this happens and how to get rid of  the artefacts if possible?

 

 

Thanks

Edited by pierre rochon

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You might try clicking on Remove Chromatic Aberration in Basic in Lightroom 5., if you have it. 

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