Problems in the sky

Started Sep 6, 2012 | Discussions thread
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Re: Problems in the sky
In reply to Lensjoy, Sep 7, 2012

Also, I looked at a histogram of the sky for the Jpeg you posted in Photoshop. The sky area definitely shows combing of the color data. This could be from a variety of sources (raw converter, LR, in-camera settings, etc.) To chase it down you'll need to supply the NEF file. If you're concerned about privacy, shoot another scene with sky and no people in it. The EXIF data could be helpful in diagnosing the trouble, so go into your D800 settings and briefly remove any personal data in the copyright section if that's a concern to you.

The nature of the combing suggests something related to exposure adjustment artifacts or compression rather than accidental 8-bit conversion somewhere along the way, but it's tough to say anything definitive without the raw file.

As far as fixing the problem in the image you have, selecting the sky in Photoshop and applying a Gaussian blur in the range of 24 pixel radius helps greatly. The lens blur filter at about double that radius also works fairly well but I liked Gaussian better. Keep the selection away from the clouds and people and feather it at about the radius of the blur filter you use.

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