PTLens

Software Homepage

PTLens is a free add-on for [Panorama Tools] that automatically corects for vignetting and lens pincushion and barrel distortion. It has received rave reviews from professionals around the world and is available as a Photoshop plug in, as a stand alone program for Windows and as a command line utility for windows.

It supports a wide range of prosumer and SLR cameras and if you do not find your camera/lens combination in PTlens, you are invited to forward calibration pictures to the author Thomas Niemann.