Hi @nicholasnicholas and welcome to the forum!
Hmm, I can’t seem to get that download link to the RAW to work, but I should still be able to help you out…
Basically, the initial conversion has just gotten a bit too aggressive here.… this can happen especially with scenes where there isn’t as much information for the analysis to work with, or with negatives that are either very dense or very thin.
Here are a few things to try that should improve your results:
- Try changing the preset setting from “NLP Standard” to “NLP Neutral”
- Adjust the WhiteClip and BlackClip settings to a negative number (like -10) and adjust these until the dynamic range fits more naturally
- Try using “Roll Analysis” to either create an analysis based on the entire roll, or use a “Single Image Calibration” from an image that turned out better and use it on this image. You can learn more about that here: Negative Lab Pro v3.0 - The Next Level of Film Processing
If after trying these things, you still see reverse vignetting in the sky, there may also be some opportunities to improve how these have been scanned. If that is the case, please share information about your film digitization setup, or review some of the best practices for DSLR scanning here.
Hope that helps!
-Nate