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Sea&Sea Announces Housing for the Canon EOS R
By Ian Bongso-Seldrup, December 21, 2018 @ 03:30 AM (EST)

Sea&Sea has announced its new housing for the Canon EOS R. The housing shares many of the features found in the company’s housings for Canon DSLRs, but in a more compact and slightly lighter weight design.

The MDX-R works with the ports and gears for Sea&Sea’s MDX-series DSLR housings. Most importantly, you can use EF-mount lenses with Canon’s EF-to-RF adapters with these ports and gears: The housing’s focus/zoom dial has two gears, one for EF-mount lenses and one for the new RF-mount lenses.

The machined aluminum housing sports built-in handles and includes a window for viewing the camera’s top LCD panel. As well as manual strobe triggering via sync cords, the housing can optionally be fitted with a hotshoe-mounted Optical YS Converter to allow fiber-optic connectivity with compatible Sea&Sea strobes in both TTL and manual modes.

Pricing and availability are not available at this time, but you can preorder the housing on Backscatter.

When purchasing underwater photography equipment like the products mentioned in this article, please support DPG by supporting our retail partner—Backscatter.com.


Sea&Sea MDX-R Underwater Housing for Canon EOS R
State-of-the-art housing for the full-frame mirrorless Canon EOS R camera. Compact, compatible with the Optical YS Converter and ergonomically designed.


Designed to be compact and lightweight.

Taking advantages of the mirrorless camera’s compact design and light weight, the housings has been designed accordingly to enhance these features. Compared to SLR MDX-5D Mark lV camera housing, the MDX-R is 100g/3.5oz lighter in weight on land.

Weight: MDX-R 2,900g/102oz, MDX-5D Mark lV: 3,000g/106oz

Ports and gears for the MDX series SLR housings can be used.

The MDX-R is compatible with the system chart for the MDX series SLR housings. You can utilize EF mount lenses with the mount adapter and ports/gears for the MDX series housings.

Port System Chart

Compatible with Optical YS Converter C/R (tentative name). TTL strobe photography possible.

The new optional Optical YS Converter C/R* which converts the camera’s hot-shoe TTL signal into an LED light signal is available. With the converter, both TTL and manual exposure photography is possible.

*Currently developing new firmware.

Designed for RF mount lenses.

The Focus/Zoom dial has two gears, one which is dedicated for RF mount lenses.

The camera’s upper control panel is visible.

A window for the camera’s upper control panel is also incorporated. As brightness of the camera’s upper control panel has increased, the visibility is now greatly improved.


  • 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.
  • Equipped with the Optical Viewfinder 0.5x as standard. Other optional viewfinders such as Optical Viewfinder 0.66x,and 0.8x can be used.
    *Some vignetting occurs.When the VF45 and VF180 1.2x is mounted on housing, the  corners 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.




[Construction] Body: corrosion-resistant aluminum alloy (machined)
  Grip: corrosion-resistant die-cast aluminum alloy
[Depth rating] 100m / 330ft
[Dimensions (WxHxD)] 342 x 174 x 159 mm / 13.5 x 6.9 x  6.3 inches
[Weight] Approx. 2,900g / 102oz (Housing only)

Port System Chart



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