Why do you get less noise with higher resolutions and/or full frame sensors?

In reference to DSLR’s someone wrote : “The advantage to using full frame is that you can get much higher resolutions without getting anywhere near as much noise as you would get on a crop sensor” is this true? Can someone explain this to me?

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3 Responses to “Why do you get less noise with higher resolutions and/or full frame sensors?”

  1. AWriterWandering said:

    It’s not the size of the sensor itself that matters. But rather the size of the individual pixels (or “photosites”). Though if a small sensor and a big one have exactly the same number of MP, the bigger sensor will have bigger pixels.

    Why are bigger pixels important? Well because they have more surface area for collecting light. And the more light that is collected, the stronger their signal to noise ratio is.

  2. c_j_ryan said:

    Yes it’s true, the reason being that the individual sensors are further apart.

    I’m sure someone will give you a more detailed answer, but not a different one!

    I’m trying to watch the Lakers/Celtics game or I would!

  3. David M said:

    As the others have said it has got to do with the size of the pixels. Smaller pixels packed close together generate more heat. The more heat that is created the more noise becomes visible. This is really apparent when you compare a DSLR with a point and shoot camera. Even a crop sensor DSLR has a sensor that is 15 times larger than that of a point and shoot. Where as a full frame sensor is only about twice as big as an APS-C sized sensor or 30 times larger than a 4/3 sensor of a point and shoot camera.

    See the article below for more info.
    http://www.dpreview.com/learn/?/key=noise




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