Adobe® Lens Profile Creator is a free utility (actually still in prerelease 3) that enables the easy creation of lens profiles for use in the Adobe Photoshop® family of products, such as Adobe Photoshop CS5, the Photoshop Camera Raw plug-in and Adobe Photoshop Lightroom®. A lens profile describes the types of optical aberrations that exist in a particular lens and prescribes how to correct the lens distortions in an image captured from the same lens.

Specifically, Lens Profile Creator characterizes three common types of lens aberrations: geometric distortion, lateral chromatic aberration and vignette.

For instance I have just created a profile to de-fish the pictures I take with my Nikon D5000 + Tokina Fisheye 10-17, and it works great! You will find plenty of documentation inside the downloaded files…

Just have a look to my result (original on the left, defished image on the right)