What is this?

[Max EPR]

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This photo was taken with a M11 and Summilux M28mm at f1.4. I have had this combination for a while and have never seen this purple/blue situation. Is it CA? Any ideas what it is? Thanks

 

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Edited November 28, 2022 by Max EPR
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[Guest]

what is the effective color temperature? I have seen strange color artifacts at the boundaries (typically low Kelvin) of the scale ... also depends on raw converter / profile used. I would try the new DXO Photolab 6 which comes with an extended gamut profile by default. HTH.

[Ba Erv]

Looks like the shadow clipping histogram warning in the develop module of LR.

[wda]

Well you do have some unidentified artificial garden lighting in your shot. That could easily contribute the effect you are seeing.

[Max EPR]

2 minutes ago, Ba Erv said:

Looks like the shadow clipping histogram warning in the develop module of LR.

It does look like shadow clipping. It's the same color. The shadow clipping icon does show the location of shadow clipping, however, it the deep blue show does not turn on/off. Thank for the hint.

[Max EPR]

That might be the issue. I just don't remember actually seeing the blue. Thanks for your comments.

[Max EPR]

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22 minutes ago, mzbe said:

what is the effective color temperature? I have seen strange color artifacts at the boundaries (typically low Kelvin) of the scale ... also depends on raw converter / profile used. I would try the new DXO Photolab 6 which comes with an extended gamut profile by default. HTH.

If I understand, Lightroom indicates 2700. That is low on the Kelvin. If that is the case, why does that occur? Thanks for the feedback.

Edited November 28, 2022 by Max EPR
added text.

[Max EPR]

2 minutes ago, Al Brown said:

Were there any UV blue lights in the garden? Thanks for the response.

 

I did not notice any. Other photos in the garden were OK.

Edited November 28, 2022 by Max EPR

[pippy]

There is an artificial light-source somewhere off to the left of image which has been recorded as a strong blue light in your frame.

Philip.

[Max EPR]

I think you are correct about the light source to the right. Thanks

[Guest]

4 hours ago, Max EPR said:

If I understand, Lightroom indicates 2700. That is low on the Kelvin. If that is the case, why does that occur? Thanks for the feedback.

Don't have a solid theory, but familiar with the pattern - low color temperature, which often coincides with high ISO, which reduces dynamic range - leading to areas of exposure problems that also have color anomalies; I have reasons to believe this relates to color gamut as sometimes switching to a. different profile (e.g. 3rd party camera profiles) will increase or reduce the issue.