Do you see barrel distortion in this image also?
This thread is about photos of people parachuting. Please take your schtick elsewhere.
Yet there's no warping in the line of stitching on the yellow webbing, which runs broadly parallel to the line of the horizon .... if the horizon has been warped by barrel distortion, that line is prime candidate to be warped too.
I disagree. First of all, you're looking at a point where the warping becomes rather minor, even in the horizon. Secondly, I appreciate that this may not be easy to discern to someone with no experience of photo manipulation, but there *is* warping there and it *can* be seen with the naked eye.
I can only repeat my encouragement for you to experiment with the photo by yourself. I could, of course, send you an altered photo, but I doubt you'd take my word for it.