Sea&Sea ships MDXL housing for Sony a7 Mark IV

Sea&Sea is shipping their MDXL housing for the Sony a7 Mark IV. It features revised ergonomics and ships with the Leak Sentinel XB vacuum leak detector as standard. It offers strobe triggering via fiber optic with optional manual or TTL converters. It has a “buoyancy pocket” that can accept an external battery.

The Sea&Sea MDXL housing is shipping now. Please consult your local dealer for pricing.

Press release

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



Equipped with Grip plus, SA8 Fixed Ball Bases, Leak Sentinel XB
* Equipped with new silicone handle inserts for a firm and steady grip as standard. Silicone compound material implanted in the grip providing firm hold.

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, the 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 an accident caused by the use of an extra battery or any other accessory stored in the Buoyancy pocket.

Buoyancy Pocket

Compatible with all the DX (NX) series ports.

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

MDXL-α7IV Other Features



Construction 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