Sea&Sea announces MDX housing for Sony a7rIV

Sea&Sea has announced their MDX housing for the Sony a7rIV mirrorless full-frame camera. It has a revised design, and ships with new silicon grip inserts, two 1” balls, and the Leak Sentinel XB vacuum leak detector. Strobe triggering is via fiber optic or optional electronic sync.

The MDXL-α7IV housing is shipping now, please consult your local Sea&Sea dealer for details.

From Sea&Sea’s website

Revised ergonomic design, improved safety features and eye-catching exterior. The new MDX-L series housings are now upgraded with more standard features to ensure better handling and greater protection for your camera

U/W Housing for Sony α7RIV


MDXL-α7IV(Black)(Housing Only)

Product No.06195

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Related Information

Model without Leak Sentinel XB #06196 MDX-α7IV


Equipped with Grip plus,SA8 Fixed Ball Bases,Leak Sentinel XB

For better noticeability, controls is partially colored with yellow.

Compatible with the Sea&Sea, “Manual Flash Trigger/S” (optional).

The camera can be mounted in the housing with its LCD monitor extended from the camera to reduce the distance between the rear window and monitor to increase visibility.

Compatible with Optical YS Converter S1

Compatible with SEA&SEA “Optical YS Converter S1” which converts the strobe light emission signal of the camera to LED light and synchronizes with the SEA&SEA YS strobe. It is a high-performance converter that does not just emit simple light-emitting signals, but also performs TTL auto light control.

Buoyancy Pocket

With Buoyancy Pocket *1, underwater weight has lessened by 240g/8.5oz *2. The pocket can be used as space for extra battery pack *3.

*1 Dimensions: 100x63x24mm/3.9x2.5x0.9 inches.
*2 Compared with the MDX-5D Mark lV, 240g/8.5oz lighter under the following condition:
MDX-α7lV + SEL90M28 + Focus Gear + DX Macro Port 87 (underwater weight: 700g/24.7oz).
*3 SEA&SEA will not take any responsibility for accident caused by use of extra battery or any other accessory stored in the Buoyancy pocket.

Compatible with all the DX (NX) series ports.

The camera can be removed from the housing easily even if a lens with large diameter such as the SEL1635GM is mounted on the camera without removing port from the housing enabling you to replace battery and lens with ease.

MDXL-α7IV Other Features



Body: corrosion-resistant aluminum alloy (machined)
Grip: corrosion-resistant die-cast aluminum alloy
Depth rating: 100m / 330ft
Dimensions: (WxHxD)] 330 x 189 x 131 mm / 13.0 x 7.4 x 5.2 inches
Weight: Approx. 2,800g / 98.8oz (Housing only)

Port System Chart