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
The camera does not capture the image instantly. It collects light over some amount of time called the *exposure* time. The longer the exposure time, the brighter the image, but in turn objects have more time to move and if they move during the exposure they will be blurry in the final image and the level of blur is proportionate to how much they moved, more movement -> more blur.
A flash makes the subject brighter, allowing us to use a *shorter exposure time* to achieve the same brightness in the final image, while giving less opportunity for movement and blurring.
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