SEA & SEA MDX-a7III Housing for Sony a7III / a7RIII Housings
SEA & SEA MDX-a7III Housing for Sony a7III / a7RIII Housings SEA & SEA MDX-a7III Housing for Sony a7III / a7RIII Housings SEA & SEA MDX-a7III Housing for Sony a7III / a7RIII Housings SEA & SEA MDX-a7III Housing for Sony a7III / a7RIII Housings SEA & SEA MDX-a7III Housing for Sony a7III / a7RIII Housings
SEA & SEA MDX-a7III Housing for Sony a7III / a7RIII Housings
Mfr# 06188
Our Price: $2,999.00
Availability: In Stock
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TTL shooting capability plus mobile Buoyancy Pocket for accessories such as Battery Chargers. Comfortably manipulate the next generation mirrorless camera and make the ultimate underwater image yours. Housing for the Sony mirrorless α7III / α7RIII

Housing designed for ease of use and weight underwater

Compatible with all the DX (NX) ports series. Larger diameter lenses can be easily removed through the increased housing port diameter to enable battery exchange in camera body without removing lens. Sea&Sea engineers have designed a unique Buoyancy Pocket*, which can also accommodate accessories such as a mobile battery charger**, without compromising the overall size of the housing. The availability of an optional battery charger has addressed battery life of the camera and allows shooting for extended periods without concern of camera power loss.
The internal space also contributes to the reduction of the weight underwater. Combined with the lightweight camera body, we realized a phenomenal underwater weight of 700 grams***, eliminating the necessity to attach large floats.

*Approx 100×63×24(mm)

**Please note any and all restrictions by camera manufacturer when using 3rd party accessories. Please use these products at your own discretion.

***Housing configured with DX macro 87 Port and SL90M28G lens.

Compatible with both the VF180 1.2x and VF45 1.2x viewfinders

By attaching the VF180 (#46112) or the VF45 prism viewfinders (#46111) (magnification ratio of 1.2x) to the housing, the magnification increases by 1.2x and entire field of view can be seen at the same time. Recommended for users committed to strict composition and focusing.

Various controls can be operated whilst holding the grips.

Frequently used Main and Sub-Command dials are now located directly on the right side of the housing. ISO, REC and other camera functions can be operated by external levers whilst holding the grips. With the AF lock function, you can fix the focus point as required.

Compatible with optical converter S1

Compatible with Sea&Sea "optical 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 like other companies, but also performs TTL auto light control.
※ Sony original adapter "ADP - MAA" is required separately for connecting camera and optical converter.



  • The Port Lock prevents the port from turning or loosening and the Port Lock lever is specifically located to avoid being unlocked accidentally.
    The housing is equipped with a lens-lock release button which makes it possible to change lenses easily, without opening the housing.
  • Pulling out the Focus/Zoom Dial gives sufficient room inside the housing to easily accommodate larger diameter lenses.
  • The camera's diopter adjustment dial can be operated from outside the housing. This feature is useful when two or more people with different eyesight use the housing.
  • All controls have luminescence stickers which glow in dark environment.
  • Equipped with the Optical Viewfinder 0.5x as standard. Other optional viewfinders such as the VF180 1.2x, VF45 1.2x and Optical Viewfinder 0.66x, 0.8x can be used.
    *Some vignetting occurs.When the VF180 1.2x is mounted on housing, the uper part of the camera's viewfinder cannot be viewed due to vignetting.
  • Sync Cord 2-pin Connector enables use of conventional hardwired Sync cable (Manual mode only).
  • Equipped with two sacrificial zinc diodes (one on the front case and the other on the rear) to prevent electrolysis damage.
  • Built-in leak sensor immediately alerts you to water ingress.
  • Tripod screw mount is located on the centre underside of the housing.
  • Equipped with under guard to protect from scrach.
Function / Efficiency
Internal Flash No
Depth rating 100m / 330 ft.
Electrical (Sync. connector) Nikonos 5-pin (Optional)
* Please refer to accessories.
Optical (Sync. connector) Yes, 2x YS Fiber Socket
* Optional Optical YS Converter required
Port Mount Sea&Sea MDX Mount
Cameras Sony A7r III
Sony A7 III
Strobes Optical Fiber
Electrical Cable (Optional Nikonos 2-pin or 5-pin Connector)
* Please refer to accessories.
Cold Shoe Mount Yes
Spare O-Ring Sea&Sea Spare O-Ring Set #62147
Dimensions 328 x 188 x 131 mm / 12.9 x 7.4 x 5.2 inches
Weight 2,700g / 95oz (Housing only)
Materials Body: corrosion-resistant aluminum alloy (machined)
Grip: corrosion-resistant die-cast aluminum alloy.
Warranty 1 Year
User Manual  Download User Manual 
  • Housing
  • Leak Sensor
  • Housing body cap
  • Fiber-optic cable socket cap (x2)
  • Light shielding plate
  • O-ring remover
  • Silicon grease
  • Hex wrench (6mm / for grip dismounting)
  • Hex wrench (3mm / for Lanyard bolt)
  • User manual
  • 1 Year warrenty
Tags: a73, a7r3


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