Best software for chromatic aberration

I've never had a problem removing CA with Photoshop.  But I don't have the 28-300mm lens either, although I don't know why that would make a difference.  And you've tried the manual CA tools under the filter menu?

A tool I used to use all the time before Photoshop got the lens correction built into ACR was PTLens by ePaperPress.  I still use it for those lenses not covered by ACR.  It works very wellbut requires a small fee.

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Mike Dawson