The housing for the Sony a1 is built around Isotta's B120 port system with 120mm bayonet, and and comes with Isotta's classic features: anodized aluminum construction, integrated adjustable handles, double O-ring seals on buttons and removable parts, Isotta’s signature one-handed open/close, and a built-in moisture detector. There’s a large-bore M28 port for attaching recorder/monitors such as
the Atomos Ninja V or Ninja V+. The housing comes with two fiber-optic ports as standard with
Nikonos N5 or S6 bulkheads as extra options.