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MDX-αU for α9II(BK) / 50122 & 50147 Electrical / 50149 Customized Kit for α9II

MDX-αU for α9II(BK) / 50122 & 50147 Electrical / 50149 Customized Kit for α9II

Product SKU : SS-07126

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Universal design for the future The back panel is designed to be large.

The back acrylic panel is more than twice as large as before to improve visibility of the monitor and reduce the underwater weight.

Furthermore, it is a sustainable design that can be used with new cameras in the future with minimal parts replacement.


Newly designed fiber-optic cable cover Newly designed optical fiber cable cover.

Newly designed fiber-optic cable cover included. Prevents optical cable terminals from falling out and smartly protects light-emitting panels and cable terminals.

Includes a strap to prevent loss of the cover.


Leak Alarm Unit as standard equipment

The Leak Alarm Unit, which was previously available as an option, is now included as standard equipment.

It is effective not only for early detection of underwater flooding accidents, but also for protection of equipment by checking its waterproof performance before entry.

CR2032 lithium battery included.


Strobe Synchro System

Three optional strobe connection methods are available.


1.Optical TTL connection

[Product No.50151] Optical YS Converter S2


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.


* Sony original adapter “ADP-MAA” is required separately for connecting camera and optical YS converter.


2.Optical manual connection

[Product No.50146]  Manual flash trigger


For those who do not need TTL photography, the fiber-optic cable connection enables manual firing of the YS strobe.


3.Electrical connection

[Product No.50147]  Strobe connector/N

[Product No.50122]  Optional Sync Cord 2-pin Connector


YS strobes can be electrically connected with a sync cord.


Full range of standard equipment

Grip Plus made of silicone material.

Robust yet secure fit to hold the housing in place.

Lighting can be deployed as desired from the SA8 fixed ball base.

Pre-equipped with lanyard hooks for convenient transportation.


Functional Limitations and Enhancement Customization Kit

Common to all models

Up/down/left/right buttons on the multi selector cannot be used.

Use the up/down/left/right buttons on the control wheel instead.

The up/down/left/right buttons on the control wheel cannot be used to move the focus point.

Focus point can be moved with the front and rear dials using the camera's dial customization function.


α1/α9II camera

Drive mode/focus mode dials are not available as standard.

It can be supported by using the optional kit.

If you want to change the drive mode etc. without modification, you can temporarily use it by registering the camera's custom shooting setting in advance and calling up the function, but it is not a perfect substitute.


α7IV Camera

The shooting mode lever cannot be used.

This can be handled by using an optional kit.

S&Q cannot be used.


[Product No.50148] α1 customize kit for MDX-αU

Compatible with drive mode dial/focus mode switching lever.


[Product No.50149] α9II Customize Kit for MDX-αU

Compatible with drive mode dial and focus mode selection lever.


[Product No.50150] α7IV Customize Kit for MDX-αU

Compatible with shooting mode selection lever.

*The α7VI customize kit cannot be used with an electrically connected strobe sync system.



[Construction] Body: 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 only)

Shipping & Payment

Delivery Options

  • SF Express (Shipping Fee Paid on Delivery)
  • S.F. Express - EF Locker Pickup
  • Office Pick-up
  • S.F. Express - Store Pickup
  • S.F. Express - Circle K Store Pickup
  • S.F. Express - 7-11 Store Pickup
  • S.F. Express - Office / Home Delivery
  • International Delivery (EMS Speedpost)

Payment Options

  • Alipay (HK)_SHOPLINE Payments
  • Credit Card
  • Paypal (+ 5% Service Charge)
  • Bank Transfer / FPS
  • WeChat Pay
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