The Xperia Z1, presented in Berlin two days before the annual IFA consumer electronics show there, is Sony's attempt to leapfrog rivals such as Nokia and Samsung in the race for the phone with the best camera.
Its standout features are a high-resolution lens built into the camera, and the option of controlling detachable lenses from the phone's 5-inch screen.
According to Sony, the lenses can also be used with other Android phones and even Apple's iPhone.
The Z1's camera functions are further supported by a large image sensor and dedicated apps that allow users to stream video directly onto their Facebook page, store images online and search for information about whatever their viewfinder is pointing at.
The phone, previously codenamed Honami, comes with 2.2 gigahertz processor and a waterproof aluminum case.
Sony said the Z1 will go on sale later this month.