The team at Lytro is completing the job of a century’s worth of theory and exploration about light fields. Lytro’s engineers and scientists have taken light fields out of the lab – miniaturizing a roomful of cameras tethered to a supercomputer and making it fit in your pocket

Richard spotted an article about this in the economist last week and I had a quick read and liked what I saw. It sounds like this isn't, yet, going to enable you to take take photos that are of a printable quality, but realistically, how many photographs get printed these days - sadly very few I suspect. What they say on the mexapixel/size issue is the following, which I don't quite understand

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