Hi. I'm working on producing some good TCA correction numbers for the Olympus XZ-2 (which I presume will also be adaptable to the XZ-1) to add to the existing profile. My first attempt involved feeding five images to hugin's tca_correct tool. Using the numbers generated produced some improvement in four of the five, and overshot to an equal-but-opposite misalignment in the fifth. In all cases I was able to improve the results by using the "tca red/blue" sliders in darktable's lensfun module for fine adjustment. Would it be reasonable to feed those adjustments back into the generated data, and if so, what would be the correct way to do that? Otherwise I'll try tca_correct again with a better batch of images when I can get some. For a 4X zoom range, is it reasonable to take only five samples and rely on interpolation, or is it better to sample at smaller zoom intervals? Thanks for any help.
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