Live data from Hacker News

Cameras and Lenses

ciechanow.ski

21–30 of 241 posts

Re: Cameras and Lenses

#21
Amazing, just amazing. Thanks alot. I would only suggest author to set og:image in your pages. When you share it on social media no image appears, you know how does it affect spreading, right? :)

Re: Cameras and Lenses

#24
post #20

The site is the work of a guy, "him", and "his" work. We don't have to guess and say "them" and "their" work.

But it's way less effort than checking, isn't it? The name in the footer isn't English, so it's hard to know from that and there's no about page that I could find. The Twitter profile makes it more obvious, but I only clicked on it to check because of your comment. Why bother??

Re: Cameras and Lenses

#25
It may not seem interesting at first, but I am intrigued by how they managed to draw the overlapping blades of the IRIS.

> In real camera lenses an adjustable aperture is often constructed from a set of overlapping blades that constitute an iris.

If you naively create 6 blades and rotate them around the pivot (the tiny screw), they will never overlap EACH OTHER. One will end up at the very top, and one at the very bottom.

If you know how this was created, please let me know.

Re: Cameras and Lenses

#26
I've seen a few of these kinds of interactive articles on hackernews but this is on a whole new level. Wow. One of the best explanations of just about anything I have ever seen.

Re: Cameras and Lenses

#27
post #25

It may not seem interesting at first, but I am intrigued by how they managed to draw the overlapping blades of the IRIS. > In real camera lenses an adjustable aperture is often constructed from a set of overlapping blades that constitute an iris. If you naively create 6 blades and rotate them around the pivot (the tiny screw), they will never overlap EACH OTHER. One will end up at the very top, and one at the very bo…

Not sure I get your question, you want to know how it works in real life ? Have a look here: https://www.youtube.com/watch?v=cR7cibDvYyo

Re: Cameras and Lenses

#29
post #27
post #25

It may not seem interesting at first, but I am intrigued by how they managed to draw the overlapping blades of the IRIS. > In real camera lenses an adjustable aperture is often constructed from a set of overlapping blades that constitute an iris. If you naively create 6 blades and rotate them around the pivot (the tiny screw), they will never overlap EACH OTHER. One will end up at the very top, and one at the very bo…

Not sure I get your question, you want to know how it works in real life ? Have a look here: https://www.youtube.com/watch?v=cR7cibDvYyo

I think the question is how is this drawn on a canvas. It's not trivial, if I draw 6 shapes successively, one will be on top and another at the bottom, you would not see the tip of one at the top and the other part of the same blade at the bottom. Nicely spotted, interesting question!

Re: Cameras and Lenses

#30
post #25

It may not seem interesting at first, but I am intrigued by how they managed to draw the overlapping blades of the IRIS. > In real camera lenses an adjustable aperture is often constructed from a set of overlapping blades that constitute an iris. If you naively create 6 blades and rotate them around the pivot (the tiny screw), they will never overlap EACH OTHER. One will end up at the very top, and one at the very bo…

Do you mean, how it was drawn using canvas?

I'm guessing they drew overlapped part of the last blade twice

Post reply on HN