Why do smartphones have triple-quadruple cameras when “dedicated” cameras have just one? What makes it better and why do we not see the 3-camera setup on actual cameras then?
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To allow for different focal ranges (zoom).
When you zoom with an ordinary camera, The elements in the lens physically move in and out in order to change the focal length. The problem is that this mechanism takes a lot of space, and the lens protrudes out of the camera. This is ok when it’s a big camera, but not when it’s a tiny camera embedded within a phone. So, the solution is to just include several camera with different focal lengths in the phone.
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