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5 Days Ago   #1
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Color problems with 645z and Lightoom

Hey guys, been trying to figure this one out for a while, but hitting a wall. Maybe someone else have encountered this issue as well.

After exporting images in Lightoom and applying exactly the same preset images have a different color cast. I tried everything I could - updating Lightroom, looking at different computers, different screens, resetting permissions etc etc. Even spent couple hours with Adobe and they did a remote session, nothing seems to be working. Here is a sample, of two images that look exactly the same in untouched RAW and look very differently after the same preset is applied. Have anyone encountered that?

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5 Days Ago   #2
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I'm not a 645z shooter - but I have seen oddities in how color balance comes out on my K-3 with Auto-WB enabled during a set of photos. I also don't use Adobe I use DXO - so my point is simply that I have seen Auto-WB fooled during what seems like pretty consistent lighting. Have you set the WB in the camera or in the PP tool to a specific Kelvin value so that the two are using the exact same value (that may be part of your preset for example.)?

Also what is the lighting? I know fluorescent and led can cause weird effects for consistency based on the shutter speed and timing since they tend to cycle not provide true continuous light.
5 Days Ago   #3
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I cannot see full exif data in your images but I can see that it says color space-uncalibrated. What color space are you using for these images when you process the raw file ?
5 Days Ago   #4
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I am assuming that you mean after importing raw images into Lightroom you applied the same preset?

I have not seen this in any version of Lightroom so I can only try and guess by elimination what may have happened. So a few questions:

Which Lightroom version?

If a standard preset which one?

As the images looked exactly the same in raw are you sure you did not apply any edits prior to or after presets and if you did, did you sync images?

I notice that your screenshot shows you to be viewing in the Library module using Select and Candidate for comparison.
How do the images compare in the Develop mode using Reference and Active?

---------- Post added 11-08-18 at 10:19 AM ----------

QuoteOriginally posted by pschlute Quote
I cannot see full exif data in your images but I can see that it says color space-uncalibrated. What color space are you using for these images when you process the raw file ?
Lightroom does not apply a colour space to images until export. Internally it uses its own wide gamut version for calculations similar to Prophoto and output similar to sRGB for display, you cannot change the internal workings


Last edited by TonyW; 5 Days Ago at 11:17 AM.
5 Days Ago   #5
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What is that preset doing to WB? If it is setting it to auto, that might be the problem. Try 'as shot'.
4 Days Ago   #6
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QuoteOriginally posted by TonyW Quote
I have not seen this in any version of Lightroom so I can only try and guess by elimination what may have happened. So a few questions:
Ditto...

QuoteOriginally posted by victormeldrew Quote
What is that preset doing to WB? If it is setting it to auto, that might be the problem. Try 'as shot'.
I too am wondering if there is a white balance or lighting issue. I doubt that gamut is to blame since LR manages its own color space for the develop module using a variant of ProPhoto RGB called something like "Melissa". Assuming one is shooting RAW, the following are common causes for stuff like this:
  • Mixed lighting, especially if fluorescent sources are part of the mix
  • LED lighting...yes, even photo-balanced LED lighting be problematic
  • Strobes/flash of different color balance
  • Auto WB misreading the subject
  • Lightroom being creative with its interpretation of the camera-supplied WB settings in the image metadata
  • User accidental user error with camera WB settings
  • Different camera profiles being applied
Starting at the bottom and working up:
  1. The so-called DNG camera profiles affect how the sliders affect image tones even if initial rendering is similar. This is a long-shot cause for your problem, but best to get it out of the way first.
  2. I have not used a 645Z, but accidental change to WB settings during a session does happen with other models courtesy of the base of the thumb and the 4-way controller
  3. RAW capture data, by itself, has no notion of WB. That being said, the camera does store its WB analysis or user-set WB in the file as metadata for use by the RAW processor. Lightroom will use this information if available, but in a creative fashion. Even a straightforward setting such as 5500K may be translated to something higher or lower, but modified with a tint tweak. If two exposures differ by a few degrees K auto WB, LR may amplify that change on import. Pinning down the WB at both exposure and/or later in PP is often helpful.
  4. Lighting problems are beyond my area of expertise except that I am familiar with how they can cause problems. Sleuthing it out is not my bailiwick except that if the model turns such that light is mostly from a different source than that of a previous frame, the two might be treated quite differently by LR.
I suspect lighting variation, auto-WB fail, and/or WB meddling by LR.

BTW...what was the nature of the preset being used?


Steve
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