Sea&Sea Sony Alpha Common Housing Suitable with a7R Mark V

Sea&Sea has now added the Sony a7R Mark V to the checklist of cameras suitable with its common housing, unveiled in July 2022. The MDX-αU already supported the “entry-level” a7 Mark IV, “video-centric” a7S Mark III, “professional sports activities” a9 Mark II, “8K-capable” a1, and the high-resolution predecessor, the a7R Mark IV. Because of the “common” design, preliminary mounting of the digital camera is a bit more concerned, there are some purposeful limitations that require workarounds, and an optionally available extra package is required.

The common housing options a big acrylic again panel, which reduces weight and goals to offer higher visibility of the LCD. There’s a fiber-optic cable cowl, which is designed to guard the connectors and stop them from falling out. A leak alarm unit is included as normal tools. The housing is accessible in a silver end in addition to the tradtional black.

The MDX-αU helps fiber-optic connectivity with suitable Sea&Sea YS strobes in TTL or handbook modes through the optionally available Optical YS Converter S2 or Guide Flash Set off, respectively. When you set off your YS strobes through sync cords, you even have the choice of {an electrical} connection.

Obtainable from retailers comparable to Backscatter, the MDX-αU is priced at $4,400.


When buying underwater pictures tools just like the merchandise talked about on this article, please assist DPG by supporting our retail companion—


Sea&Sea MDX-αU Underwater Housing for Sony α1/α9II/α7sIII/α7RIV/α7IV/α7RV

Common compatibility with Sony Alpha collection. The longer term-oriented mirrorless SLR suitable housing is now totally loaded


Common design for the longer term. The again panel is designed to be giant

The again acrylic panel is greater than twice as giant as earlier than to enhance visibility of the monitor and scale back the underwater weight. Moreover, it’s a sustainable design that can be utilized with new cameras sooner or later with minimal elements substitute.

Newly designed fiber-optic cable cowl Newly designed optical fiber cable cowl

Newly designed fiber-optic cable cowl included. Prevents optical cable terminals from falling out and well protects light-emitting panels and cable terminals. Features a strap to stop lack of the duvet.


Leak Alarm Unit as normal tools

The Leak Alarm Unit, which was beforehand accessible as an choice, is now included as normal tools. It’s efficient not just for early detection of underwater flooding accidents, but in addition for defense of apparatus by checking its waterproof efficiency earlier than entry. CR2032 lithium battery included.

Product No.44135 Leak Alarm Unit Product Web page.

Strobe Synchro System

Three optionally available strobe connection strategies can be found.

1. Optical TTL connection

[Product No.50151]  Optical YS Converter S2

Suitable with SEA&SEA “Optical YS Converter S2” which converts the strobe gentle emission sign of the digital camera to LED gentle and synchronizes with the SEA&SEA YS strobe. It’s a high-performance converter that doesn’t simply emit easy light-emitting alerts, but in addition performs TTL auto gentle management.


*Sony authentic adapter “ADP-MAA” is required individually for connecting digital camera and optical YS converter.


Optical TTL connection


2. Optical handbook connection

[Product No.50146]  Guide flash set off

For individuals who don’t want TTL pictures, the fiber-optic cable connection allows handbook firing of the YS strobe.

Optical handbook connection


3. Electrical connection

[Product No.50147]  Strobe connector/N

[Product No.50122]  Non-compulsory Sync Wire 2-pin Connector

YS strobes might be electrically linked with a sync twine.

Electrical connection


Full vary of normal tools

  • Grip Plus manufactured from silicone materials
  • Strong but safe match to carry the housing in place
  • Lighting might be deployed as desired from the SA8 mounted ball base
  • Pre-equipped with lanyard hooks for handy transportation

Focus Level Motion Settings

To carry out “focus level operation” throughout capturing, please make a customized setting for the main focus level within the dial customization of the digital camera prematurely. The main target level might be moved by working the entrance/rear dial.

The next is a information to the setup process for assigning the main focus level operation to the entrance and rear dials.



Enhancement Customization Package

Widespread to all fashions

  • Up/down/left/proper buttons on the multi selector can’t be used
  • Use the up/down/left/proper buttons on the management wheel as a substitute
  • The up/down/left/proper buttons on the management wheel can’t be used to maneuver the main focus level
  • Focus level might be moved with the entrance and rear dials utilizing the digital camera’s dial customization operate

α1/α9II digital camera

  • Drive mode/focus mode dials are usually not accessible as normal
  • It may be supported by utilizing the optionally available package
  • If you wish to change the drive mode and many others. with out modification, you may briefly use it by registering the digital camera’s customized capturing setting prematurely and calling up the operate, however it’s not an ideal substitute

α7IV digital camera

  • The capturing mode lever can’t be used
  • This may be dealt with by utilizing an optionally available package
  • S&Q can’t be used

α7V digital camera

  • The capturing mode lever can’t be used
  • This may be dealt with by utilizing an optionally available package
  • S&Q can’t be used

[Product No.50148] α1 customise package for MDX-αU

Suitable with drive mode dial/focus mode switching lever.

[Product No.50149] α9II Customise Package for MDX-αU

Suitable with drive mode dial and focus mode choice lever.

[Product No.50150] α7IV Customise Package for MDX-αU

Suitable with capturing mode choice lever.

[Product No.50152] α7RV Customise Package for MDX-α7RVU

Suitable with capturing mode choice lever.

*The α7RV customise package can’t be used with an electrically linked strobe sync system.

Different Options

  • The Port Lock prevents the port from turning or loosening and the Port Lock lever is particularly positioned to keep away from being unlocked unintentionally

  • The housing is supplied with a lens-lock launch button which makes it attainable to vary lenses simply, with out opening the housing

  • Pulling out the Focus/Zoom Dial provides enough space contained in the housing to simply accommodate bigger diameter lenses

  • Geared up with the Optical Viewfinder 0.5x as normal. Different optionally available viewfinders such because the VF180 1.2x, VF45 1.2x and Optical Viewfinder 0.66x, 0.8x can be utilized

    ※Some vignetting happens.When the VF180 1.2x is mounted on housing, the uper a part of the digital camera’s viewfinder can’t be considered resulting from vignetting

  • Geared up with two sacrificial zinc diodes (one on the entrance case and the opposite on the rear) to stop electrolysis injury

  • Tripod screw mount is positioned on the centre underside of the housing


[Construction] Physique: corrosion-resistant aluminum alloy (machined)
  Grip: corrosion-resistant die-cast aluminum alloy
[Depth rating] 100m / 330ft
[Dimensions (WxHxD)] 330 x 169 x 137 mm / 12.9 x 6.6 x  5.4 inches
[Weight] Approx. 2,900g / 102.3oz (Housing solely)
[Set Item] Silicone grease, O-ring remover, Hex wrench (6mm / for grip dismounting), Hex wrench (4mm / for Lanyard bolt), Hex wrench (2mm), O-ring upkeep handbook, Instruction handbook (this handbook), CR2032 lithium battery (for leak alarm unit), Leak alarm unit handbook pump
[Attached accessories to the product] Housing physique cap, Fiber-optic cable cowl