I'm quite sure this question has been asked before. I dropped Windows for years and I use Ubuntu only so I grabbed Aftershot Pro since it runs on Linux. One thing that annoys me though is the lack of lens correction profile for most of my lenses. I'm using 18.104.22.168, the latest version before AfterShot Pro 2. The only calibrated lens for me is P20. P12-35, O12-50 and O40-150 are uncalibrated. According to Photozone.de reviews, when uncorrected, 1. for O40-150, the wide end has -4% barrel distortion, while 70, 100 and 150 have <1% distortion which I can live with it. 2. for O12-50, the wide end has -6.9% barrel distortion, 0.1% at 25 and 1% at 50. 3. for P12-35, the wide end has -5.8% barrel, -1% at 20 and 0.7% at 35. Can someone refer me to where I can find the correction coefficients, or do I have to do it myself? Thanks in advance.