Nuke - Lens Distortion

I wrote this 10 years ago and Nuke’s Lens Distortion node has been re-written since this came out. I have to check and see if this is still relevant.

When Nuke 6 came out, I was happy to see that they had included a Lens Distortion node.  To my frustration, while it was easy to undistort my footage, it was difficult (impossible?) for me to redistort it.  This is important, because the workflow that I follow requires the ability to redistort undistorted footage