I’ve been using Lightroom’s built-in flat-field correction tool to great benefit with my scanned negatives, but I’m having an issue with some of them seemingly developing discoloration when doing so. I generally much prefer the evenness of the light across the frame with the flat-field correction, but I’m really struggling to figure out this discoloration issue.
My issue with this particular example is a blueish green discoloration present in the bottom corners that is not there in a real life, or in a conversion from the RAW file.
I’ve attached a link to Google Photos containing a RAW file, a DNG that has been flat-field corrected and converted using NLP, and the reference frame I used for the flat-field correction. I’m hoping someone can help me figure this out because I feel like I’ve almost perfected my workflow, but this problem is holding me back.