I can't downvote, but this seems a bit thin for HN.
How Your Camera Works
21–30 of 35 posts
Re: How Your Camera Works
#22> Click! Your camera just turned photons into bits. Click! Your camera just made a skeuomorphic sound.
I said to a friend once that a new camera model had improved noise reduction. He thought I meant it was quieter when taking pictures, but I actually meant the image quality was clear in low light.
Depending on the camera reduced shutter noise might be a very welcome change, too ... my old 40D is quite loud.
Re: How Your Camera Works
#23How your phone camera works. It's a well written article but it seems odd to cover how a camera works and leave out Aperture because of the edge case of having a fixed aperture as in a smartphone. With a longer description of aperture and some picture examples of aperture controlling DoF and exposure this would have been a complete introduction to digital photography, now it's a complete introduction to fixed-aperture digital photography...
Re: How Your Camera Works
#24I recently started looking into computational photography. I didn't realize how much of the imaging acquisition process I was ignorant of: color theory, exposure, shutter speeds ... It's all pretty intuitive, but I feel like need to learn optics to really get it all!
A few friends have done (taught) Masters degrees in photography (at a medical university, no less). A lot of time is spent painting, drawing, framing; exactly as you say, photography involves much than just pointing a camera.
Re: How Your Camera Works
#25I can't downvote, but this seems a bit thin for HN.
Noone can down vote submissions.
As far as I know most people can flag submissions so if you think it really doesn't belong here you could flag it.
Re: How Your Camera Works
#26How your phone camera works. It's a well written article but it seems odd to cover how a camera works and leave out Aperture because of the edge case of having a fixed aperture as in a smartphone. With a longer description of aperture and some picture examples of aperture controlling DoF and exposure this would have been a complete introduction to digital photography, now it's a complete introduction to fixed-apertur…
> because of the edge case
Edge case? Phone cameras are very common and more common than DSLRs and probably more common than digital point and shoot.
Re: How Your Camera Works
#27> Click! Your camera just turned photons into bits. Click! Your camera just made a skeuomorphic sound.
flat design sound effects?
IIRC due to pervs chucking cameras onto selfie-sticks and taking upskirt photos and the like, digital cameras are required to make a clear and un-muteable (camera) sound in some countries.
Re: How Your Camera Works
#28Can someone explain to me how ISO on a digital camera works? Are several pixels combined (the resolution lowered)?
I always think it's odd to have ISO settings on a digital camera.
Re: How Your Camera Works
#29Can someone explain to me how ISO on a digital camera works? Are several pixels combined (the resolution lowered)? I always think it's odd to have ISO settings on a digital camera.
No, the ISO setting adjusts the analog gain before conversion to digital. As you would expect, this raises the noise floor. It is natural and expected to be able to adjust speed on a digital camera, because the dynamic range of a ADC is limited, and you want to be able to use that range optimally.
For example, suppose your camera has a dynamic range of 10 stops. If you are shooting a scene with a dynamic range of 8 stops, then you get +/-1 stop of latitude where mistakes in exposure can be corrected digitally. Overexpose, and the signal will sometimes be above the range of the ADC. Underexpose, and the signal will sometimes be below the range of the ADC. You can adjust either the exposure (aperture, shutter speed) or the signal gain (ISO) to get the signal into the right range.
You do the same exact thing when you're recording digital audio: you adjust the gain so that you use most of the range of the DAC. As in photography, you can try increasing the gain afterwards, but you might get problems with noise.
Re: How Your Camera Works
#30I recently started looking into computational photography. I didn't realize how much of the imaging acquisition process I was ignorant of: color theory, exposure, shutter speeds ... It's all pretty intuitive, but I feel like need to learn optics to really get it all!
There's this Stanford projects called Frankencamera [1] which is pretty jaw-dropping. They do a bunch of cool stuff but the one feature that really stood out was that you can take a photo and then focus it in post-production. [1] https://frankencamera.wordpress.com
Correct link: http://graphics.stanford.edu/projects/camera-2.0/