get rid of image border deformation (wide lens)

I remember reading about a plug that would help with that but can't find it any more

How about a screenshot of what you are trying to fix? Plug-ins aren't the answer to everything...sometimes it's in the software you already own and you just need a suggestion on how to do it

When life gives you dilemmas...make dilemmanade.

several solutions. (Sapphire, Pixel Farm : both expensive)

for your googling the key word will be " barrel distortion"