Sea & Sea Sony a7R IV Underwater Housing MDX-α7RIVU

Universal compatibility with the Sony Alpha series.

The future-oriented mirrorless SLR-compatible housing is now fully loaded.

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 the monitor's visibility and reduce its 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.

A newly designed fiber-optic cable cover is included. It prevents optical cable terminals from falling out and smartly protects light-emitting panels and cable terminals. The cover includes a strap to prevent it from being lost.

Leak Alarm Unit as standard equipment

The Leak Alarm Unit, 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 protecting equipment by checking its waterproof performance before entry. A CR2032 lithium battery is included.

Strobe Synchro System

Three optional strobe connection methods are available.

1. Optical TTL connection: Optical YS Converter S2

Compatible with SEA&SEA's "Optical YS Converter S1," which converts the camera's strobe light emission signal to LED light and synchronizes with the SEA&SEA YS strobe. It is a high-performance converter that emits simple light-emitting signals and performs TTL auto light control.

2. Optical manual connection: 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: Strobe connector/N & Optional Sync Cord 2-pin Connector

YS strobes can be electrically connected with a sync cord.

Full range of standard equipment

Grip Plus is made of silicone, a robust yet secure fit that holds the housing in place. Lighting can be deployed as desired from the SA8 fixed ball base. It is pre-equipped with lanyard hooks for convenient transportation.

Focus Point Movement Settings

To perform "focus point operation" during shooting, please make a custom setting for the focus point in the camera's dial customization in advance. The focus point can be moved by operating the front/rear dial.

Other Features

• The Port Lock prevents the port from turning or loosening, and the Port Lock lever is specifically located to prevent accidental unlocking.
• The housing is equipped with a lens-lock release button, which allows for easy lens change without opening the housing.
• Pulling out the Focus/Zoom Dial gives sufficient room inside the housing to easily accommodate larger-diameter lenses.
• All controls have luminescence stickers that glow in a dark environment.
• It is 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.
• Equipped with two sacrificial zinc diodes (one on the front case and the other on the rear) to prevent electrolysis damage.
• Tripod screw mount is located on the centre 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 169 x 137 mm / 12.9 x 6.6 x 5.4 inches
• [Weight] Approx. 2.9g / 6.4lbs (Housing only)
• [Set Item]: Silicone grease, O-ring remover, Hex wrench (6mm / for grip dismounting), Hex wrench (4mm / for Lanyard bolt), Hex wrench (2mm), O-ring maintenance manual, Instruction manual (this manual), CR2032 lithium battery (for leak alarm unit), Leak alarm unit manual pump
• Attached accessories to the product: Housing body cap, Fiber-optic cable cover