Re: That's why it's called a PORTRAIT lens - or why my nose looks big.
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. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: That's why it's called a PORTRAIT lens - or why my nose looks big.
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. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: That's why it's called a PORTRAIT lens - or why my nose looks big.
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. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: That's why it's called a PORTRAIT lens - or why my nose looks big.
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. On Fri, Mar 2, 2018 at 11:36 AM, Igor PDML-StR wrote: > > > This news popped up on a few science websites yesterday (I suspect due to > Rutgers' PR department's efforts), - and I just saw it on CBS morning news > review this morning. > > https://phys.org/news/2018-03-distortive-effects-short-distance-nasal.html > > While what they discussed is fine, they should've worked with a photographer > and a zoom lens instead of (or in addition to the > simulations). > > I believe this is well known in the photo community. (Isn't it?) > And that's why "portrait lenses" are used for ghm... portraits (what a > coincidence!) -- because of the most flattering angle of view/facial > features proportions. > But I am preaching to the choir here... ;-) > > Cheers, > > Igor > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- -bmw -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: That's why it's called a PORTRAIT lens - or why my nose looks big.
Well known in the photo community is kind of an understatement. This has been common knowledge in photography since the late 1800s and in fact was explored by artists without special lenses simple mathematical models of perspective since the early renaissance. George Santayana was right. On 3/2/2018 11:36 AM, Igor PDML-StR wrote: This news popped up on a few science websites yesterday (I suspect due to Rutgers' PR department's efforts), - and I just saw it on CBS morning news review this morning. https://phys.org/news/2018-03-distortive-effects-short-distance-nasal.html While what they discussed is fine, they should've worked with a photographer and a zoom lens instead of (or in addition to the simulations). I believe this is well known in the photo community. (Isn't it?) And that's why "portrait lenses" are used for ghm... portraits (what a coincidence!) -- because of the most flattering angle of view/facial features proportions. But I am preaching to the choir here... ;-) Cheers, Igor -- America wasn't founded so that we could all be better. America was founded so we could all be anything we damn well please. - P.J. O'Rourke -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.