On Wednesday, besides introducing the Sony Xperia Z1, Sony is expected to reveal the Sony Smart Shot line of interchangeable lens; using a magnet to adhere to a smartphone body, the Smart Shot line will apparently be introduced with two different variants available. We've already gone through the difference between the QX-100 and the lower priced QX-10...
Source: http://www.phonearena.com/news/New-photos-of-Sony-Smart-Shot-lens-show-how-they-attach-to-your-phone_id46976
Source: http://www.phonearena.com/news/New-photos-of-Sony-Smart-Shot-lens-show-how-they-attach-to-your-phone_id46976