"It's all because of the computing power, the computational photography it's going into it has nothing to do with the optics and the sensor size. I mean, a tiny bit, but it's, it's all the computational. Whereas on the bigger camera, it's the lens. It's the sensor size that's going into that, obviously a lot more, but there is none of that computational photography."
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http://www.thisweekinphoto.com