Questions tagged [rolling-shutter]

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20
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5answers
11k views

What is a rolling shutter? When do I have to be aware of it?

In answer to another question, Adam Davis writes: Your camera complicates this by using a rolling shutter above a given speed (usually around 1/200. This means that only a portion of the ...
13
votes
3answers
3k views

If a rolling shutter travels from top to bottom, why does this image seem to show skew in the other direction?

In the picture below you can see that the rolling shutter moves downwards...i.e., it exposes the light to the sensor from top to bottom. . So the information that the sensor recieves is a bit ...
14
votes
3answers
4k views

Why do DSLRs in movie mode have a rolling shutter instead of a global shutter?

Correct me if I'm wrong: When I take a picture, the sensor gathers the light information "as a whole" during the exposure time and then saves it in the card. When I make a movie, the sensor scans ...
5
votes
5answers
804 views

Why do cameras use a slit between two curtains rather than exposing the entire sensor instantly?

Why is it more effective to use "a slit travelling from top to bottom of the sensor" in faster shutter speeds, rather than exposing the entire sensor instantly? And the slit thing only comes in fast ...