. "The Sony \u03B17, \u03B17R and \u03B17S are three closely related digital cameras. The first two were announced on 16 October 2013 and the third on 6 April 2014. Externally they are identical except for the model number. They are Sony\u2019s first full-frame mirrorless interchangeable lens cameras and share the E-mount with the company\u2019s smaller sensor NEX series.The \u03B17 II was announced in November 2014, and is the first in the family to revise the original body and ergonomics."@en . . . .