this post was submitted on 13 Nov 2024
564 points (99.1% liked)
memes
18528 readers
3055 users here now
Community rules
1. Be civil
No trolling, bigotry or other insulting / annoying behaviour
2. No politics
This is non-politics community. For political memes please go to !politicalmemes@lemmy.world
3. No recent reposts
Check for reposts when posting a meme, you can only repost after 1 month
4. No bots
No bots without the express approval of the mods or the admins
5. No Spam/Ads/AI Slop
No advertisements or spam. This is an instance rule and the only way to live. We also consider AI slop to be spam in this community and is subject to removal.
A collection of some classic Lemmy memes for your enjoyment
Sister communities
- !tenforward@lemmy.world : Star Trek memes, chat and shitposts
- !lemmyshitpost@lemmy.world : Lemmy Shitposts, anything and everything goes.
- !linuxmemes@lemmy.world : Linux themed memes
- !comicstrips@lemmy.world : for those who love comic stories.
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Ok how do I translate these numbers to distance from mirror?
Camera focal length
Our eyes and brains compensate for a lot of things that cameras do not. White balance is a good one, where things indoor under warm lighting can look orange while things out in the sunlight can look blue.
I think perspective and distance correction with human faces is definitely one of those. So if you got the distance from the mirror correct, the effect might not jump out at you in person like it does with photos.
It's not distance to mirror, it's the focal length. The focal length of our eyes is static
The "focal length" of our eyes is a subjective number, because our retinas aren't flat and our attention doesn't cover our whole field of view at the same time.
The numbers shown in that gif are the focal length, but the change in perspective is indeed actually due to the camera’s distance from the subject. When you are close to a person with a wide lens, their nose is considerably closer to the camera than their ears and hair, so it appears bigger. When you are further away with a nice telephoto lens for portraits, all their facial features are roughly the same distance away, so they all appear the same size.