This Samyang (Bell & Howell branded) 14mm lens on 35mm full frame is amazingly wide and quite sharp but the distortion is crazy. I expected that I could correct it somewhat in software and that is to some extent true in ACR but PT Lens makes it accurate enough that I am unable to discern any geometric distortion even at 100% in Photoshop. (Edit: 05-15 I've finally come across a lens profile for ACR that is quite good)