Posted: Feb 29, 2020 9:15 pm
Hermit wrote:OlivierK wrote:Hermit wrote:Fisheye lens, barrel distortion and plain ole astigmatism will do that.
I guess barrel distortion would account for that photo...
Well, maybe I've got astigmatism, then (not that any has ever shown up on my eye tests). The horizon has always looked (very, very slightly) curved to me, from my usual beach parking spot on a headland about 20m up, with ~180 degrees of ocean view.
Did you read the article I provided a link to?
Yes, it's why I conceded that barrel distortion would account for the obvious curvature in the photo I posted, as the horizon is in the top half of the photo. That doesn't change the fact when I look at the horizon with a very wide field of view, that I perceive curvature. It may just be a sort of illusion, or self-induced response to knowing there is a tiny amount of curvature, or it may even be astigmatism at a level too small to require correction.
I don't know what causes me to experience the horizon as curved, hence the
