Nokia used a xenon flash like a real camera flash, downside is they need a big capacitor that takes space and they can't stay on for more than a "flash". modern phones have really bright LEDs for a flash.
Yup, and the lower the flash output as percentage of it's total output, the shorter the duration.
Edit: Here is what is really going on in the second shot: A high shutter speed is not freezing the disk. That can't be the case because the Nokia is not capable of a high enough flash sync speed to freeze the disk, nor is there enough flash power on the Nokia to have that fast of a shutter even if it did have flash sync speed. Outside of some pro gear, flash sync speeds are limited to 1/125 sec at most. The flash duration here is probably like 1/10,000 sec. I am guessing the Nokia is shooting at that sync speed, 1/125 sec, which would leave the shot way under exposed, as it shown by the shadow of the disk on the background. All the light is coming from the flash within that 1/125 sec window in which the shutter is open, in a much shorter 1/10,000 sec flash duration give or take.
I'm not a camera guy, but here I go. The camera "recorded" a lot of spinning in the 1/125 of a second. But the sensors in the camera detect light and accumulate it. The bright flash lasted a 1/10000th of a second, and provided most of the light the camera detected. It was so brief that the disc looked almost static. When the sensor read all the light it accumulated in that 1/125th of a second, the ammount of light of that 1/10000th of a second was so high compared to the rest that it basically overwrote whatever happened the rest of the time. u/Usedtobecoffeeaddict
This is a great explanation! Not that I can verify whether it's accurate because I'm also clueless when it comes to cameras. But if it's correct, you're a hell of a teacher 😄
photographer here. Yea, its generally just that. The Nokia with a super bright flash can capture the thing with enough light in1/8000th of a second (or thereabouts). The disk doesnt noticeably spin in 1/8000th of a second
Whereas the iphone needs to open the camera shutter for a longer time, to let more light in, because it lacks a powerful flash. So the disk turns a lot in 1/250th of a second, or thereabouts
none of the shutter speeds are shown in the video, so IDK the numbers exaclty, but my guesses are probably pretty close
yup!! u js need a camera/phone that can take a pic with a quick enough shutter speed and a good flash. every mirrorless or dslr camera should be able to recreate this effect, not sure about phone cameras tho :P
The inbuild led flashlight used by modern phones aren't able to flash nearly as fast. But if you use a seperate flashlight and your phone combined then yes you should be able to do that.
Aaaaaahhhhhh! So it’s kinda like a sensor that only outputs the highest reading, and since the flash creates such a “spike” in the reading, it only collects the light info from the duration of that “spike” leading to a “frozen” image?
No, but yes. It charges a capacitor in a way proportional to the energy it receives. Then releases all the charge acumulated for that subpixel. So in the moments without light, that pixel may have acumulated, say, 5 in red, 2 in green, and 6 in blue. Then during the flash it acumulated 200 in red, 60 in green, and 24 in blue. So the total would be 205, 62 and 30. The blurry disc is technically affecting the image, but the effect is minute compared to the still image.
Product photographer here and use professional flash units. This is something I deal with daily but this comment is spot on. The image burns in over time. If you want to have full control over your lighting you first set your settings you have a fully black frame. Then you add lights and turn them.up one by one until your happy. The best way to make sure you don't have spill.light etc..We just use the settings to cut out all natural light then use flashes to quickly add much more light
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u/o0260o 21d ago
Nokia used a xenon flash like a real camera flash, downside is they need a big capacitor that takes space and they can't stay on for more than a "flash". modern phones have really bright LEDs for a flash.