Exposure difference between raw (NEF) and DNG

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FirstName LastName

• January 21, 2021 16:46

I've been noticing a considerable difference in exposure between the raw file and when I convert it to DNG. I have reset all adjustments to neutral thinking it might have been a previous adjustment. Still having the same issue.

Please advice.

The top image is the DNG. The bottom image is how I shot it (raw)

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  Claude CAUWE

  • January 21, 2021 17:10

  Have something almost similar when exporting to JPG.

  The JPG (sRGB) is much darker than the RAW/NEF

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  CSP

  • January 21, 2021 17:49

  by convert to dng do you mean in fact export ? 

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  FirstName LastName

  • January 21, 2021 18:43

  Yes, by converting it to DNG and exporting to photoshop. As per example, the photo on top is the DNG in photo shop, the photo on the bottom is the raw file in Capture One.

  Subsequently, I processed the file to Tiff, and I get exactly the correct exposure (meaning no change in exposure). 

  So, something is happening when converting to DNG.

   

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  CSP

  • January 21, 2021 19:05
  • Edited

  most settings you have applied to the raw file are ignored when you export a dng. c1 has in fact no real dng support ! 

   

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  FirstName LastName

  • January 21, 2021 19:42

  I typically make no adjustments in C1, and export the files as DNG to my editor (who edits in photoshop).  He came to me today to and said the picture was darker than normal.  That's when I noticed the exposure difference between C1 and Photoshop.  I am curious to figure out why I see the difference.  

  We have determined that it is not the camera because this exposure difference never happened in Lightroom when transferring (DNG) to photoshop.  It makes me wonder if there is a proprietary setting in C1 that auto adjust the image while tethered?

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  CSP

  • January 21, 2021 20:11
  • Edited

  the default tone curves applied are different, c1 uses an outdated dng version. played a little and it seems exif data written by c1 is not dng conform so arc does not apply the correct lens correction and uses a generic color profile, very strange but no surprise !  I would strongly recommend you use the free dng converter or other adobe software instead c1 but also in this case the image will always be slightly darker with arc !  

   

   

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  FirstName LastName

  • January 21, 2021 21:25
  • Edited

  Thanks! Thats good to know, do you think they will update the DNG version sometime soon? Or are we stuck for awhile... we chose to use C1 because It was able to use live view, ability to have three cameras connected, and familiarity.   Is there one specific DNG converter that you would recommend besides Adobe?  Thank you so much for your help!

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  CSP

  • January 21, 2021 21:52

  don't think c1 is very interested in helping adobe user and what they deliver as DNG support since a while now is a jock so guess things will not change much. to see for yourself what they guy which is working with your images sees adobe is absolute the best option so the combination of bridge and the adobe dng converter is probably the easiest solution think both are free too. c1 does read so generated dng files similar to the original raw but will display it different compared to photoshop because of the different processing engines and tone curves. 

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