And unlike DxO, PTLens allows you to modify the parameters. Moreover, the Photoshop plug-in version allows you to work in 16Bits/Channel mode and can work on modified Photoshop files (as long as EXIF data are preserved in Photoshop and no cropping occurred). But unlike DxO, there is no need for the image to come straight out of the camera. Both the plug-in and standalone versions allow for batch processing.
PTLens takes away the need for guessing parameters required with Panorama Tools, and even the need to own Photoshop, as there is a standalone version (2) that works-like DxO-independently from Photoshop. DxO only removed about 65% (1) of the barrel distortion, while PTLens created a 100% straight line from top to bottom (the distance between the red reference line and the glass of the building is identical in the top, middle, and bottom crops). The red reference line is perfectly parallel to the glass of the building.
The distance between the red reference line and the glass of the building is reduced in the top and bottom crops. The distance between the red reference line and the glass of the building is large in the top and bottom crops.
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