p.1 #3 · Lens Correction Profile for Samyang/Bower, etc. 14mm
On my website I have a Adobe lightroom / Photoshop lens profile for the Samyang/ Bower/Pro Optic/Falcon/Walimex/Vivitar/Rokinon 14mm/2.8.
These work well, some say they are better than others, but I still see images where they are not good enough (sea level in image).
The PT lens correction based on one of my images as far as I know is probably better. And a very good way in case you donīt have Lightroom at the moment.