![]() One such piece of software is PTLens, which includes the Samyang 14mm f/2.8 as one of it's profiled lenses. In this case you can rely on someone somewhere figuring out the set of parameters (usually called a profile) and posting them online. Verdict: PTLens is a highly functional tool that has various features for correcting lens distortion, vignetting, color fringing and perspective.By using this software to correct lens distortion, you can easily reduce the barrel aberration produced by wide-angle optical accessories. ![]() If your lens is fixed focal length and the distortion is independent of focus distance (which I think it largely is with the Samyang 14mm f/2.8) then one set of parameters can easily be applied to all images generated by all copies of the lens (that aren't decentered in some way). Therefore you need a piece of software/plugin that can do different types of distortion, along with the parameters of the distortion. You can usually only tune one parameter of the correction so you'll never eliminate the moustache. ![]() The reason the Photozone review states that this distortion is difficult to detect, is that most software only offers very simple correction based on radially symmetric distortions based on simple formulas. It's very difficult to correct by hand, but very very easy for a computer to correct, given a formula for how the distortion behaves.
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