Equipment Underwater Imaging

SEA&SEA Announces MDX-a7II Housing

Designed, engineered, and manufactured in Japan, SEA&SEA’s latest mirrorless housing, the MDX-a7II for Sony Alpha a7II, is unmatched in its class.

SEA&SEA Announcement-MDX-a7II (2015 05 01)1 copy

The ergonomical and full-featured MDX-a7II housing allows for operation of the Sony Alpha a7II camera’s essential controls in a low profile design.  Using the newly developed ML-NX Conversion Ring 30, the MDX-a7II housing is compatible with all of SEA&SEA’s premier NX ports in addition to the popular ML Ports.


The MDX-a7II housing accommodates SEA&SEA’s exclusive Internal Optical YS-Converter, which eliminates the need for a Sync Cord system.  The converter works via the hot shoe to trigger the strobe when the camera’s shutter is activated, converting the TTL signal to a light signal.  This Fiber Optic system allows for rapid strobe firing, reduced recycle time, and eliminates possible leak points that occur on traditional bulkheads.

Housing Features:

  • Optical YS-Converter compatible
  • Ergonomically re-designed levers
  • Diopter adjustment dial
  • Luminescent buttons
  • Movable Focus and Zoom gear
  • 10O LCD tilt allowance
  • Compatible with all SEA&SEA NX Ports
  • Two (2) fiber-optic cable sockets
  • One (1) N-Type (2-pin) connector and one (1) HDMI accessory port
  • Two (2) sacrificial zinc diodes (front and rear)
  • Compatible with optional VF45 and VF180 view finders
  • Built-in leak detector sensor


  • Body: Corrosion-resistant aluminum alloy (machined)
  • Grip: Corrosion-resistant die-cast aluminum alloy
  • Depth rating: 100m / 330ft
  • Dimension (WxHxD): 325x160x104mm / 12.8×6.3×4.1inch
  • Weight: Approx. 2,250g / 79.4oz (housing only), 1,860g / 65.6oz (without grips)
  • Compatible Accessories: SEA&SEA Strobes, Sea Arm 8, and Fiber-Optic Cable II 

Available Early May 2015

MDX-a7II (SS-06176): MAP $2,895.95