Currently Luminar 2018 does an inadequate job of removing lateral CA. This is particularly so with lenses that have complex, non-linear, lateral CA where different levels of CA correction are required across the image frame. Generally I find that Luminar 2018 only partially removes lateral CA. Because of this weakness I now actually disable Luminar's CA removal tool when rendering RAW's to TIFF and then open the TIFF in Adobe Camera Raw to let ACR remove the CA more thoroughly. Awkward.
I really wish Luminar would invest some time improving their CA algorithm because it is a core conversion function and it is much better to do CA removal on the RAW before demosaic rather than afterwards on a fully rendered TIFF. The reason why is explained best by Photo Ninja:
"Photo Ninja includes a highly effective solution for removing color fringing due to lateral chromatic aberration (LCA). In most cases, Photo Ninja can accurately measure and correct LCA without user intervention and with excellent results. Significantly, for RAW images, Photo Ninja corrects LCA prior to demosaicing, before the aberration is smeared across channels by demosaicing, color correction, and other processing. The resulting improvement is striking compared to post-demosaicing correction. The technology is powerful enough to remove complex, nonlinear LCA that is exhibited by some modern lenses."
Although Photo Ninja pioneered this advanced CA removal method many years ago, Lightroom, C1 Pro, and DxO Optics Pro quickly follow suit. Now essentially everyone has good CA removal except Luminar.
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