Jos,
You are right, optical parameters of a single eye play a role too.
But because the image we "see" is a result of the brain combining the
image from both eyes (if the binocular vision is working alright), -
both play a role.
The distance makes a difference, but when we are finding a lens
that produces an image comparable to what we see, - we are comparing
for the same FOV (which is a combination of the distance and focal length.
This page provides some information on that (although I had expected it
to be a bit more clear):
https://en.wikipedia.org/wiki/Normal_lens
Igor
Jos de Fotograaf Fri, 02 Mar 2018 13:20:22 -0800 wrote:
I see it differently:
Also people with one eye can see perspective.
Perspective has to do with relative distance to the subject.
At the right distance for a certain perspective, you have to chose a angle
of view for the wanted size of he subject.
Greetz, Jos
On 02-Mar-18 21:52, Igor PDML-StR wrote:
Well, it depends on how the eyes of those aliens are lined up.
The "normal" lens is "normal" for a human. (Just to remind in case someone
here has forgotten: the normal lens provides the perspective close to that
seen by a person.)
So, for an alien with two eyes located closer to each other then ours or even
vertically, it will be all very different.
BTW, while my daughter was very little, just a few months old, some of the
photos of her that I took were with Sigma 24/1.8 purchased from one of the
PDMLers. I needed a fast lens and I needed to shoot from a short distance
(usually I needed to be able to catch her or reach her with my hand.
So, some of the facial views were a bit "alien-like".
As for the original plastic surgeon, - I'd like to get his opinion on this
photo:
http://42graphy.org/galleries/PeachCreek/_IR09965.html
and this:
http://42graphy.org/galleries/PeachCreek/_IR09963.html
Cheers!
Igor
Bruce Walker Fri, 02 Mar 2018 10:01:07 -0800 wrote:
Yep. I've been saying for ages that aliens examining our culture will
get a very distorted impression of what our faces looked like based on
modern smartphone selfies.
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