Sea & Sea Sony a7 IV Underwater Housing MDX-α7IV

Revised ergonomic design, improved safety features and eye-catching exterior. The new MDX series housings are now upgraded with more standard features to ensure better handling and greater protection for your camera

Equipped with Grip plus, SA8 Fixed Ball Bases

Equipped with new silicone handle inserts for firm and steady grip as standard. Silicone compound material implanted in the grip provides a firm hold.  SA8 Fixed Ball Bases now comes standard with MDX-L series housings

For better noticeability, controls are partially colored 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.
 
Sony original adapter “ADP-MAA” is required separately for connecting the camera and optical YS converter.

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 the protection of equipment by checking its waterproof performance before entry. CR2032 lithium battery included.

Buoyancy Pocket

With Buoyancy Pocket *1, underwater weight has lessened by 240g/8.5oz *2. The pocket can be used as space for an 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 accidents caused by the use of extra battery or any other accessory stored in the Buoyancy pocket.

Compatible with all the DX (NX) series ports.

The camera can be removed from the housing quickly 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 easily replace the battery and lens.

MDX-α7IV Other Features

• 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 that glow in dark environments.
• 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 the housing, the upper part of the camera's viewfinder cannot be viewed due to vignetting. 
• Sync Cord 2-pin Connector enables the 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.
• The Tripod screw mount is located on the center underside of the housing.
• Equipped with under guard to protect from scratches.

Specifications

• [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)