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Cameras and Lenses

ciechanow.ski

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Re: Cameras and Lenses

#104

Post by antonfire »

h_spacer wrote: post #50
franga2000 wrote: post #24

Earlier quoted context omitted.

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??

Slav surnames are gendered. * ski is male, * ska is female, * sko is neutral. Using gender neutral in this case is as insulting as calling him a dog. Other cases where using gender neutral pronouns insults everyone speaking the language is using Latinx for Latino. If you want to butcher every other languages genders like they are in English, use Latin instead - the gender neutral form of Latino in English since only…

> Using gender neutral in this case is as insulting as calling him a dog.

In English? No it isn't. You are the one who is "butchering" a language's pronouns by improperly mapping considerations into it from another language here, not vice versa.

I have a Slavic last name, and I speak English fluently and Russian not-so-fluently-anymore.

If you use "оно" to refer to me in Russian because you don't know my gender, it would sound weird to me. (I haven't been to any Russian-speaking countries in a while, but I suspect there hasn't been a shift in Russian to use that pronoun that way while I've been gone.) I personally wouldn't be insulted, but I can easily imagine how somebody might; it would carry a subtext of referring to me as an inanimate object.

If you use "they" to refer to me in English because you don't know my gender, it would not sound weird to me at all. (Though it might have 5-10 years ago, for different reasons.) A much closer (but still imperfect) analogy to using "оно" to refer to me in Russian would be using "it" to refer to me in English, which would sound weird to me.

Hope that helps.

Re: Cameras and Lenses

#109

Post by daralthus »

The only thing better than a pinhole camera is a pinhole camera with multiple holes.

Let me explain:

When you have two holes (apertures), their images would likely overlap (depending on the arrangement).

Imagine you took two photos from a few millimetres apart to the left and to the right, then you superimposed them. Some areas would look ok (as both views saw the same distant object) and some would be less ok (of objects that are closer).

If you have a DSLR take the lens off and put a sheet with holes in front. Just try it.

Now as you add more holes you get more and more overlapping images on the same area of the sensor and eventually end up with a blur.

This blur is the same blur you see with a single large hole. It's just that with a large hole you had infinitely many overlaps!

Even cooler, if you happen to arrange the holes in a specific pattern you could capture images with different combinations of perspectives from different holes and you may even undo the overlaps. This is called coded aperture imaging:

https://www.paulcarlisle.net/codedaperture/

This doesn't just solve the biggest problem (limited light) of a single hole, but also captures depth information and you can use it for 3d reconstruction, refocusing etc.

One final bit, with a warning of a deep rabbit hole:

That "infinitely many overlaps" I was talking about happens with lenses too and is essentially a convolution where you convolve the image with itself (actually many different perspectives of itself if I am correct). Which is just the Fourier transform.

Re: Cameras and Lenses

#110

Post by [deleted] »

echelon wrote: post #82
h_spacer wrote: post #78

Earlier quoted context omitted.

Sorry to hear that you hold other cultures in such low regard.

Culture and gender aren't linked. Does culture tell you if someone's gender, sexual preferences, what kind of car they drive, whether or not they're a furry, what god(s) they do or do not believe in, etc.? Don't put people in boxes based on your limited world view. Think about the limit. When we're uploaded to the matrix, you'll finally be able to be whatever gender you want to be without fear for the stupid stigmas…

[deleted]
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