Is there a way to correct this using Aperture 3? It's not 'lateral chromatic aberration'.
https://en.wikipedia.org/wiki/Purple_fringing
https://en.wikipedia.org/wiki/Purple_fringing
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Axial Chromatic Aberration correction?
- Thread starter jerwin
- Start date
- Sort by reaction score
Yes, Aperture 3's chromatic aberration correction should handle it in most cases.
If that doesn't work you could use a color adjustment brush to desaturate the purple areas.
You'll likely find that true axial CA (out of focus purple "glow" around edges) can only be mitigated by desaturating the purple (magenta-red) area. The automatic CA removal algorithms found in most software only works on lateral CA (purple on one edge and green on the opposite side's edge and can also be a blue-yellow pairing). Since lateral CA is an alignment/scaling issue it can be fixed mathmatically. Axial CA is a focus issue and would involve selectively sharpening only the colors involved, which in an RGB image can't easily, if it's even possible, be isolated algorithmicly.