Capture one underexposing

NN635615662767872138UL

• 13. Juni 2015 11:04

Hi guys, I've been having an issue with the contrast & darkness on my Digi back & capture one.

when viewing the image on the lcd, the image is properly exposed with correct tonal contrast showing all details in the shadows. However once uploaded in Capture one, once the preview has finished generating, the image becomes significantly darker and i loose all the details in the shadows.
Please help. Any suggestions?
much appreciated guys

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  Keith Reeder

  • 13. Juni 2015 11:12

  Turn down the brightness on the LCD?

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  HansB

  • 13. Juni 2015 11:17

  1st) Compare histograms between DB and CO, to make sure they are significantly different.
  2nd) Check your CO settings. Do you apply settings like presets or styles, including camera profile, film curve, exposure, etc, automatically on upload/import? Do you have the correct settings there? For example, linear curve makes your image look up to 2 stops darker.
  
  
  Regards,
  Hans

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  NN635615662767872138UL

  • 2. August 2015 04:11

  Hi Guys a big THANK YOU for the kind feedback and help. Ive spent the last few weeks trying to nail this problem. I followed your advice, and My Credo DB's Histogram is identical to CO.
  So Ive come to the conclusion that the visual tonal differences has to do with the generation of the preview in CO. The credo processed thumbnails are based upon the camera defaults, and the CO interpretation of the same image data is different once imported. Been going through he settings to rectify this, Any advice guys?
  cheers

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  Ian Wilson

  Moderator

  • 2. August 2015 13:31

  

  Is this affected by the ICC profile selected in your output recipe? If I change it from SRGB Color Space Profile to say Embed Camera Profile or Adobe RGB (1998) I see the histogram in C1 change.
  
  Ian

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  dee jjjaaaa

  • 3. August 2015 16:21

  [quote="Ian3" wrote:
  Is this affected by the ICC profile selected in your output recipe?

  
  
  my $0.02
  
  "brightness" of the resulting output might be affected by
  
  1) LUT/curves in "camera profile" (icc/icm container)
  
  and/or
  
  2) curve from .fcrv files from P1 (linear, linear scientific, film, etc, etc), there also might be some additional instructions stored in .fcrv file that tell converter what to do for example with clipped highlights or data close to clipping - compare how linear curve behave vs linear scientific or may be even to apply some hidden exposure correction too.
  
  and/or
  
  3) your own corrections that you do through C1 user interface
  
  and/or
  
  4) hidden corrections that C1 code might do for a specific camera model (for example Adobe products ACR/LR do that) in addition to #1, #2, #3
  
  ---
  
  change of brightness through the icc/icm profile selected to designate the output colorspace is not the reason

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