Colour 'banding' in my photos (sometimes)

January 14th, 2017
Hello all,

Anyone else getting these colour bands in their photos...?

Top left where the blue colour from the centre of frame out towards the edges....
Starting to wonder if I am doing something wrong while processing.

I open my RAW files in Adobe Bridge, click on them to open up Adobe CameraRAW to tweak them, then open in Photoshop and save as.......!

I don't think I am doing anything I shouldn't.

Any tips would be good....
This only seems to happen once in a blue moon.

To have a look at the photo look at today;s upload and click on the image to see it on black to see what I mean.

Thanks in advance for any help.
January 14th, 2017
are you editing in PS also or just camera raw.. If you save an image as a JPEG then edit it more this can happen as it is only an 8 bit image if you save as a 16 bit TIFF until you are completely done editing it it will help. Also I have used some aftermarket actions in PS that where really prone to doing this to images.
January 14th, 2017
Yes, the effect is sometimes called "posetization" and can come about from not enough contrasting detail. It will sometimes happen if you adjust the tones of the affected places down too far and then save as jpegs. Nothing much you can do in the jpeg. Is it that way in the psd file or just in the jpeg? On the jpeg you can try to paint over the area affected with the spot healing brush in Photoshop. Nothing much is possible in ACR or LR.
January 14th, 2017
@stevescamera don't know if this helps but I just watched this youtube on this subject!
January 14th, 2017
I thought heard somewhere, from someone a tip about changing the photo to 16-bit temporarily to make the changes in the sky, then saving back at 8 bit? Or I might be totally dreaming. I'll see if I can find my notes....
January 15th, 2017
@houser934 You should always edit in 16 bit mode even if you are saving as 8 bit jpegs eventually. Scott Kelby has said on more than one occasion "Why bother?" But others, Martin Evening for one, suggest that it really does matter in certain situations.
January 15th, 2017
You may not like the effect, and I don't know the cause. But it reminds me of a filter I've seen used before. I like it a lot!
January 16th, 2017
@frankhymus @houser934 @jackies365 @frankhymus @deadschool Thank you all for replying. I did know this but I had clearly forgotten about it. It's not usually a problem but once in a while it it pops up but this was really noticeable so I thought something must have been wrong. But the tutorials make sense so I will try and bear this in mind for future edits :)
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