While the Sony QX lens cameras are designed to be compatible with most smartphones, the Japanese company made sure that they best work with their own mobile devices. That’s why they’ve released a dedicated smartphone casing just for the 6.4-inch Xperia Z Ultra. So that either the QX10 and QX100 should fit snugly onto the Z Ultra. However, owners of the Sony phablet who are in the U.S. are still going to wait for the official announcement of the device’s availability date. The black or white casing is going to cost around $30.