The Nauticam NA-GFX100S places all the important controls at the underwater photographer’s fingertips, including AF-ON and Q controls via a double lever near the right handle, as well as Playback and DISP via a double lever near the left. The housing supports Nauticam’s well-known N120 port system, thus supporting Fujifilm’s GF-mount lenses. Nauticam’s water contact optics, such as the WACP-2, are supported as well.

The housing can optionally accommodate Fujifilm’s EF-X20 TTL flash, which then allows one to optically trigger underwater strobes via the housing’s built-in fiber-optic bulkheads. A classic Nikonos bulkhead supports the connection and trigger of wired strobes, but only in manual mode (no TTL). An additional M24 bulkhead provides extra output via HDMI 2.0—to an external recorder such as the Atomos Ninja V, for example, or to an external monitor (via HDMI 1.4) such as the Atomos Shinobi.

The housing measures 355mm in width, 190mm in height, and 142mm in depth. It weighs 3.23kg topside and 0.05kg (including camera and battery) underwater. It is depth-rated to 100m.