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Changing white balance causes different results on nearly identical images

New Here ,
Jul 29, 2020

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I shoot long exposure time lapses of the night sky, never encountered this problem before.  Shot with a Canon 6D all settings in manual, including white balance.

 

After importing a batch of RAW images I adjusted the color temp from 3000 to 4500 and synched to apply the change to all photos.  Most of the images look correct, however random images throughout the batch have a totally different color to the sky, almost turquoise instead of blue.

 

Can't wrap my head around what is happening... the images are essentially identical in every way.  Why am I getting such different results?

 

thanks in advance for any help.

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Bug, Problem or error, Sync

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Changing white balance causes different results on nearly identical images

New Here ,
Jul 29, 2020

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I shoot long exposure time lapses of the night sky, never encountered this problem before.  Shot with a Canon 6D all settings in manual, including white balance.

 

After importing a batch of RAW images I adjusted the color temp from 3000 to 4500 and synched to apply the change to all photos.  Most of the images look correct, however random images throughout the batch have a totally different color to the sky, almost turquoise instead of blue.

 

Can't wrap my head around what is happening... the images are essentially identical in every way.  Why am I getting such different results?

 

thanks in advance for any help.

TOPICS
Bug, Problem or error, Sync

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53

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Jul 29, 2020 0
Adobe Community Professional ,
Jul 29, 2020

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Be useful to have access to download one of each to examine. 

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Jul 29, 2020 0
New Here ,
Jul 29, 2020

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Sure thing:

 

https://www.dropbox.com/sh/mwi1zr31t1n3twr/AAAN0wEd1U_ynS6Yteaweo2ya?dl=0

 

After playing around a bit I noticed the color differences really become apperent when I raise the exposure, drop the blacks, and apply a little dehaze.  But if I don't change the color temp, I can change all other perameters without getting the unusual color differences.  Also realized these were shot on a Canon M6, not a 6D, if that matters.

 

thanks again!

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Jul 29, 2020 0
Adobe Community Professional ,
Jul 29, 2020

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Tough image to WB due to the lack of anything that's not very light but not a specular highlight. But I did zoom in to 11:1 (massive enlargement) and tried WB on one of the stars for each. I got the same results. 

Try picking exactly the same spot, with a big zoom ratio otherwise the WB tool may be sampling differing areas and producing differing results. Anyway:

Screen Shot 2020-07-29 at 5.00.35 PM.jpgScreen Shot 2020-07-29 at 5.00.48 PM.jpg

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Jul 29, 2020 0
New Here ,
Jul 29, 2020

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Interesting.  If I'm not using the white balance tool and manually setting the temp value, would this still cause lightroom to sample the image differently?

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Jul 29, 2020 0
Adobe Community Professional ,
Jul 29, 2020

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Not sure, sorry. 

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Jul 29, 2020 0
New Here ,
Jul 29, 2020

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Ok, thanks for trying.

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