This is a video tutorial to explain how to split an image into three separate channels (Red, Green and Blue) to create effects such as Chromatic Aberration.
On MovLab website you can find the files and the printed version of this tutorial:
8. Efeito Cromatic Aberration (movlab.ulusofona.pt)
Filipe Costa Luz, 2012
Chromatic Aberration Tutorial (The Foundry Nuke) from filipe luz on Vimeo.