[harywilke]

Depends on the reason why you are doing this transform. If it's just a visual correction filter, then that will work well enough. If you are trying to track camera movement on a series of images and match a 3D model to the footage, then it's not. You want to analyze the actual images the lens is producing and generate the distortion from that. Every lens is different. Different setups with the same lens may produce different distortions. A warm lens behaves different than a cool lens. Change the focus, and the distortion may change (lens breathing). Some lenses exhibit different distortions at different zoom levels.