Lateral chromatic aberration (color fringing along edges) can be corrected in software, including Canon’s free Digital Photo Profession (DPP). This is available for most Canon bodies and lenses (but only Canon lenses, unlike Nikon’s Capture NX2, which works with any lens).
Shoot RAW of course. In DPP, select an image and hit cmd-T to bring up the image processing palette, click on, then check the box as shown below. Dismiss the dialog, and that’s it— you’re done.
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