Earlier this month at IFA, Sony introduced an entirely new type of point-and-shoot camera. The QX10 and its big brother, the QX100, are missing a built-in LCD. Instead, framing, image review, configuration and even storage are all handled on another device: your smartphone. These "lens cameras," as they've become unofficially known, mount directly on a handset you already own, pairing with Sony's PlayMemories Mobile app via WiFi. The benefits are considerable. The absence of a display allows for a more compact body, improved power efficiency and a lower price tag. The QX100, for example, includes the same optics as Sony's flagship RX100 Mark II, but retails for $500, compared to $750 for its fully equipped counterpart. The QX10 is the more mainstream of the two, with a smaller footprint and an affordable $250 price tag. We focus on this model just below.