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I am quite sure that the answer is here: Is it possible to get a double exposure with a digital camera? Your wife's camera phone has a feature called "HDR", where it takes two pictures in quick succession and combines them, in order to better capture both bright and dark areas. It happens quickly, but if the subject (here, it's you) moves quickly, you'll ...


In addition to the more content related answers, I'd like to add that multiple exposures result in less noise than one long exposure. The phenomenon is described in more detail here and is a standard technique in astro imaging, also called stacking.


With a single long exposure everything that happens from start to finish is included in the frame. With multiple exposures you can pause to allow changes to the scene to be made without the time during which those changes are made being included in the photo. You can even totally change the composition by changing aperture, focal length, or even to a ...


what the difference would be between using it and just using a single exposure at a slow speed The difference is that you can take several completely different exposures all in the same frame. There are lots of ways you can use it. For example, you could take a shot of a landscape and then a shot of a person against a dark background. The effect you'd ...

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