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A few years ago (at least 10 years I believe), I read in a magazine about a "revolutionary" camera which was able to take pictures such that from one picture you could, afterwards, choose the point you wanted to focus on (during the post-processing).

I do not remember the name of that camera, I just recall it was in the shape of a cuboid (a rather long one) and (very vague memory) that it was black or red.

I could not find anything online but would be interested to see what it has become (and read about the technology - if it was not snake oil).

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I'm guessing you're referring to the Lytro by Lytro, Inc. It's an example of a light-field or plenoptic camera.

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    And to add -- it wasn't snake oil, in that it did what it said it did (allowed for refocusing in postprocessing). The tech behind it is actually really cool. It was, however, not commercially successful. – Nic Hartley Dec 14 '18 at 17:43

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