Our window blinds at school had tiny holes in them for the strings to go through and they had the exact same effect. You could see the eclipse projected once the tables.
Comment on I c it!
Triumph@fedia.io 1 day ago
The reason this happens is because the tiny gaps between the leaves act as lenses, like in a pinhole camera.
Opisek@piefed.blahaj.zone 23 hours ago
Wolf314159@startrek.website 23 hours ago
A pinhole camera has no lens. The effect here is like a pinhole camera, but a pinhole camera is nothing at all like a lens. Pinholes diffract light. Lens refract light.
Quibblekrust@thelemmy.club 18 hours ago
The diffraction effects from a pinhole camera are not what make them work. In fact, diffraction makes the photographs worse than they otherwise would be. The pinhole makes an effective aperture for photography because it’s small size produces small circles of confusion on the film plane. Ideally, you would make the hole as small as possible, but beyond a certain (small) size, defraction becomes the dominant source of blurring. So the size of the pinhole should be chosen to yield the best balance between geometric blur and diffraction blur.
The diffraction is merely a limit to the smallness of the aperture, and not what creates the image.
Wolf314159@startrek.website 12 hours ago
I didn’t say this, you did. You’re chasing your own tail.
Buddahriffic@lemmy.world 4 hours ago
If you didn’t intend to imply that, it’s on how you communicated, not how they interpreted it. The way you listed what each does implied you were saying that’s how their images worked.
Quibblekrust@thelemmy.club 3 hours ago
You made a parallel sentence construction:
You directly contrasted them. Refraction is obviously key to how lenses work. So it seemed to me like you were saying that diffraction is key to how pinholes work. 🤷
Dasus@lemmy.world 20 hours ago
Yea, but you could achieve this by placing a circle of cardboard in the middle or a ring that you attach to your lens.
I don’t remember the guy but YT shorts I’ve seen a guy testing all sorts of different shapes and filters in front of his lenses or even just in front of his sensor without a lens.
Can’t recall who.
Anyhow