US underwater housing maker Nauticam has announced the NA-NEX6 for Sony's NEX-6 interchangeable lens camera. Providing protection up to 100 meters depth, its body is made from aluminum with a scratch-resistant acrylic rear cover. It features a single-lock housing and a patented lens attachment mechanism which allows you to change lenses without removing the camera from the housing (presumably as long as you're not underwater at the time). The NA-NEX6 is available in the US at a retail price of $1650.

Nauticam NA-NEX6 underwater housing for the Sony NEX-6 mirrorless camera + 18-55mm kit lens

Nauticam's provides a range of 'ports' which attach to the housing and accommodate several of Sony's E mount lenses including the 18-55mm, 30mm macro, and 16mm pancake. It also offers a special port which can be used with Sony's 16-50mm f/3.5-5.6. This includes a focus/zoom knob to support the lens' power zoom operation.

The manufacture also offers a range of additional accessories for the housing including an external viewfinder, flash adapters and a rubberized handgrip. 

The NA-NEX6 comes comes with a  a scratch -resistant acrylic LCD cover. A self-locking mechanism that gives an audible and visual confirmation of proper camera installation.