Fehler nach kopierten Entwicklungseinstellungen.

[kostein.jpg]

Hallo an die Community,

ich stehe vor folgendem Problem.

Ich habe ein Nachtzeitraffer (Einzelbilder) aufgenommen. Rund 700 stk.

Ein Foto habe ich bearbeitet und wollte wie gewohnt die Entwicklungseinstellungen auf die weiteren Bilder kopieren. Gesagt getan. Nur musste ich leider feststellen, dass einige der Bilder auf die ich die Entwicklungseinstellungen eingefügt habe anders aussehen. Einzelne Bilder sind komischerweise heller.

Testweise habe ich die Bilder exportiert. Doch auch bei den Exportierten JPEG's ist dieser Unterschied zu sehen.

Ich habe absolut keine Erklärung dafür, da ISO, Blende & Verschlusszeit gleich geblieben sind.

Ist bei einem von euch dieses Problem auch shconmal aufgetreten? Ich hoffe auf eure Hilfe.

Danke!

[johnrellis]

If you share the source photo you edited and one of the target photos to which you copied the settings, we can see if the same problem occurs in other LR configurations and hopefully identify a fix or workaround.  To share, select the two photos, do Metadata > Save Metadata To File to capture their develop settings, and upload them (and their .xmp sidecars if they're raw) to Dropbox, Google Drive, or similar and post the sharing link here.

[johnrellis · Accepted solution]

[This post contains formatting and embedded images that don't appear in email. View the post in your Web browser.]

The issue is caused by the design of the Highlights and Shadows sliders, which are "image-adaptive" (more on that below). I provide a workaround at the end.

To demonstrate that it's those two sliders causing the issue: Here are the source and destination photos you uploaded, with no adjustments applied:

They were taken with the same settings just 105 seconds apart, and they look nearly identical, with nearly identical histograms. There are very small differences due to the rotation of the sky and the short streak of a satellite.

Here's the source and destination photo with all your settings applied:

As you observed, the destination photo is much brighter, with a much different histogram.

When you set Highlights and Shadows of the source photo to 0 and then copy all the settings to the destination, the destination photo and its histogram are nearly the same as the source:

Conversely, if you reset all the source settings except Highlights and Shadows and then copy all the settings to the destination, the source and destination photos are much different, including their histograms:

The Lightroom Queen's Missing FAQ explains:

"Lightroom’s Basic panel Tone sliders are image-adaptive (intelligent). The range and effect of the sliders changes based on the content of the photo and the values of the other Basic panel sliders."

The algorithms used by the image-adaptive sliders are usually what mathematicians call "stable" -- small changes in the input photo cause small changes in the resulting output photo. But you've encountered a case where Highlights and Shadows are "unstable" -- a very small change in the input photo causes a large change in the output.  I'm guessing that's because these night-sky photos are atypical compared to most photos, with almost all pixels at the left end of the histogram and a smaller fraction at the right end, with little in between.

A workaround is to use the Tone Curve instead of the Basic panel's Tone sliders. The Tone Curve isn't image-adaptive -- it applies the same transformation to pixel colors regardless of the content of the photo and other settings.  You should be able to get a similar appearance using the Tone Curve, but it might take a lot of trial and error if, like me, you're much more experienced using the Basic Tone sliders.

[kostein.jpg]

Thanks a lot! It seems very reasonable. I tried your workaround, and it works perfectly.