A simple experiment at home on how depth appears to be compressed when photographed from a distance with a telephoto lens trick
- Make a row on A4 paper with batteries as appropriate, making it feel like you’re far enough away.
- Keep the camera about 5 times farther away than A4.
- It should be at a near horizontal angle that doesn’t change the height of your head too much.
- The subject doesn’t have to be the entire screen, because I’ll crop it.
- In human terms, they appear to be close enough to touch backs, but
- In fact, they’re pretty far apart.
- Hiding the feet makes it even easier to misunderstand.
Why this happens.
- Since depth cannot be determined from a two-dimensional image, humans estimate depth by the ratio of the sizes of the person in front and the person in the back.
- But this size ratio is determined not by the difference in depth itself, but by the ratio of the difference in depth to the distance from the viewpoint
- Even with the same ratio, the farther away the viewpoint is, the greater the difference in depth.
- In the case of the naked eye of a living person, when a person is far away, the image in the eye is also smaller
- But if you take a picture with a camera and enlarge it, the estimation of the distance to that subject will not work.
- If I could see his face, I’d think “close enough to see his face”.
- As a result, the distance between the people in the front and the people in the back is also short and misunderstood
- camera
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