Samsung has just taken the wraps off its latest mid-range smartphone -- the Galaxy A9 -- and it’s one that the South Korean tech giant says has been made with "Instagram generation" firmly in mind. The key difference between this, and other similarly priced devices is it comes with the world's first quad camera. This might seem like a gimmick, and to a degree it probably is, but actually each of the four lenses servers a different, useful purpose. The 'main' lens is a 24-megapixel shooter, and then there’s a 5-megapixel depth lens, which lets you play around with the…
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