I don’t understand how using a flash can freeze motion better than ambient light. In the end, isn’t it all just light hitting the sensor?
I don’t understand why it would do this. I mean it’s not necessarily like the camera knows and is like “Oh they’re using flash, I’ll be nice and give them a sharper picture’. I mean obviously they don’t think like that, but all in all it’s light luminating the subject and hitting the sensor, why does something like the source of the light affect how much motion can appear in your image?
In: Technology
Think of a camera sensor as a bunch of buckets, each pixel one bucket. And they collect photons, how bright a pixel is depends on how many it collects. If the incoming light is brighter, you get enough photons faster, which means there is less time for the subject to move while exposure is going on and photons are being collected. Flash, the bulb type, not the phone LED, is very bright for a very brief period of time. There just isn’t enough time for things to move much in the scene, and that’s why you get less motion blur than by doing a longer exposure.
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