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Author Topic: a7r banding issue with lightroom 5.3 RC  (Read 1446 times)
larkis
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« on: December 07, 2013, 01:28:46 AM »
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Can anyone confirm they get a similar issue with the a7r raw files using the "adobe standard" profile ? (open the link in a new window for a bigger image)



Dragging the tint slider creates banding in the image which does not show up in the "camera neutral" profile.
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JRSmit
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« Reply #1 on: December 07, 2013, 03:55:15 AM »
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Would like to see the histogram in both cases. Looks like clipping in a color channel.
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larkis
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« Reply #2 on: December 07, 2013, 09:08:09 AM »
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I will upload a raw file when I get back home, but the histogram in this file is no where near to clipping. I have observed this effect in a lot of the a7r raw files. I will build a custom dng profile for the camera  to check if it will behave like the adobe standard profile.
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Tim Lookingbill
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« Reply #3 on: December 07, 2013, 10:33:41 PM »
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I get the same exaggerated redness in skin tones using Adobe Standard with my 2006 Pentax K100D's Raw PEFs. From past discussions and similar color effects I've seen on a wide range of scenes AdobeStd acts or is designed to neutralize the entire color scale of an image that changes its color constancy (overall color DNA for lack of a better description) in combination with WB appearance which this profile assumes quite a bit of green to get rid of the red blooming that can crop up as you've demonstrated.

Surprisingly in my experience using AdobeStd it has the added advantage of reducing clipping in scenes with extreme WB shifts away from D50 such as sunsets and tungsten.

I even conducted a test of sorts noticing this bluing neutralization induced redness by shifting the green tint slider from its normal +6 to 0>-6 give or take and got the same rendering as if I applied my custom DNG profile on most normally lit scenes leaving "As Shot" WB.

Not sure why you need to use AdobeStd seeing the other image you posted as an inset doesn't show the redness.
« Last Edit: December 07, 2013, 10:35:31 PM by Tim Lookingbill » Logged
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