darktable 3.8 and lensfun database

[Peter]

Distortion correction samples:

Create a distortion correction profile for Lensfun

Vignetting correction samples:

Lensfun - take pictures for vignetting correction

Tca correction sample to:

Create lens calibration data for lensfun

For tca correction I found a grey metal fence with white background to be really good. [stangsel_20211120_MG_3721] [uncorrected] Uncorrected [corrected-version1] Source motive for tca correction was what I think this one. [corrected-version2] Fence as a source sample.