Optical YS Converter/C can be built into the housing
Compatible with new Optical YS Converter/C1 for RDX housing which converts the camera’s TTL signal to a light signal. Both TTL and manual strobe photography is possible using a Fiber-Optic Cable II.
Focus/Zoom control has been fully redesigned
The gear mechanism is now similar to MDX series housings. Perfect gear mesh enables accurate and quick zooming and focusing.
Compatible with the VF180 1.2x viewfinders
By attaching the VF180 prism viewfinder (magnification ratio of 1.2x) to a SEA&SEA housing, the magnification increases by 1.2x and entire field of view can be seen at the same time. Recommended for users committed to strict composition and focusing.