Mobile phone cameras generally aren't known for their fantastic image quality. One of the reasons for this is the fact that most of them have fixed-focus lenses, as opposed to the autofocus lenses on all but the cheapest stand-alone cameras. The phone cameras partially compensate by using a small aperture to maintain a good depth of field, but this limits their use in low-light situations. Of course, their lenses could automatically focus by moving in and out (like those on larger cameras), but this would draw considerable power from the phones' batteries. Now, however, Norwegian scientists have unveiled a low-power autofocus lens for mobile phone cameras, that works like the human eye.
Read the full article: Mini autofocus lens mimics the human eye