The title won’t make sense if I don’t explain as I barely understand the basics. I have recently learned about the rolling shutter effect from this video:
I have seen several posts here on reddit illustrating what happens when the camera shutter is the same as for example the blades of a helicopter. I get that the blades appear to not move but why I don’t get is why the blades aren’t frozen and also bent as seen in the rolling shutter effect.
Example of helicopter blades for example:
https://youtu.be/yr3ngmRuGUc
In: Technology
There are at least ways of capturing an image by using a rolling shutter or a global shutter.
In a film camera and even in a DSLR today you have a mechanical rolling shutter that mover in front of the film/ sensor looks at them [in this video clip](https://youtu.be/CmjeCchGRQo?t=138). So the top of the senor is exposed before the bottom. If you have a short shutter speed the distance between the two shutters is small and it looks [like this part of the video](https://youtu.be/CmjeCchGRQo?t=251). So you capture the image through a narrow moving horizontal window.
If you capture an image of a fast-moving object that way it will be distorted because it will move and be in a different position for different parts of the sensor.
Even in camera no physical shutter the common CMOS sensor you read it outline for the line starting at the top and the lowe part continued to gather light so you have an electronic rolling shutter with the exact same effect.
In a more expensive and more sensitive CCD sensor, you have a global shutter and capture the whole image at the same time. They do not have the artifact
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