deke.com posts about chromatic

Deke's Techniques 215: Defringing Purples and Greens in Camera Raw 7

Deke explains how to use the Defringe slider bars in Adobe Camera Raw 7, which ships with Photoshop CS6.

Deke's Techniques 023: Fixing Chromatic Aberrations in Photoshop

This week's technique exposes that hidden plague of nearly every photograph, transverse chromatic aberrations. It's hideous to see but easy to correct.