Nauticam a2020 Underwater Sony a7RIV or a9II Ultimate System

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Nauticam NA-a2020 System for the Sony A7RIV or A9II Camera

Combines the Nauticam NA-a2020 housing with two powerful Inon Z330 strobes, ports for the Sigma 15mm f2.8 EX DG fisheye lens, and a Kraken 4000 focus/video light! All the latest gear for wide angle in one great package!


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Optical Ocean's Nauticam a2020 for Sony A7RIV or A9II Ultimate Fisheye Package

Optical Ocean's Nauticam Sony A7RIV or A9II Ultimate Fisheye Package combines the Nauticam NA-a2020 Housing for Sony's A7RIV or A9II cameras with dual Inon Z330 strobes and a glass 140mm dome port and extension for the Sigma 15mm f2.8 EX DG fisheye lens. Also included in the package is a mini flash trigger, Kraken Hydra 4000 video/focus light, M10 Ball mount, hand strap, universal fiber optic sync-cords, ball mount adapters for the Inon Z330s, and Nauticam arms and clamps.

The NA-Α2020 Underwater Housing

Nauticam has supported the Sony Alpha full-frame line since the original a7 with professional grade aluminum housings that offer intuitive access to all the controls and functions of the cameras. As the cameras have evolved, so have the Nauticam housings. The Nauticam NA-α2020 takes Nauticam's commitment to the Sony full-frame mirrorless line to another level by delivering the first housing that will support both the a9 II and the a7R IV with full access to all controls without modification or restriction. Integrated DSLR-housing styled handles with ergonomic rubberized grips and stainless steel stiffening brackets add stability and accessory mounting points. The NA-α2020 also features dual rear thumb-levers that are easily reached from the handle that access three of the most-used controls on the rear of the camera. The right lever actuates the AF-ON and RECORD buttons while the left lever is mapped to the PLAY button. Atop the housing on the left side are controls specific to the a9II in the form of a MODE dial and FOCUS mode lever. The C1, C2 buttons as well as the EV compensation dial also have direct access from the top of the housing. The C3, which is typically assigned to control switching between the EVF and the LCD screen is easily reachable on the rear of the housing from the left handle.

Port Configuration

The Optical Ocean Ultimate A7RIV system includes a 140mm optical glass dome port, N100 to N120 adapter, and zoom gear for the Sigma 15mm f2.8 EX DG fisheye lens. This lens mounts onto the Sony E-mount system using a Metabones or Sigma MC-11 adapter and is a great all-around lens for reef shots, large animals and close-focus wide angle. Upgradable to fit the Canon 8-15mm FE by adding an extension and gearing.

Inon Z-330 Underwater Photo Strobe

The Inon Z330 underwater strobe is small and powerful. It uses 4x AA batteries and has manual and S-TTL which is compatible with a wide range of today's cameras. The light output is a circular beam and the color temperature warmer than other strobes.

  • Guide Number 33

  • 110 Degrees of Coverage Underwater

  • Robust and Durable Construction

  • Includes a rotatable light shade to help prevent backscatter

  • 220 lumen focus light

  • Enhanced controls with large knobs

Kraken Hydra 4000 Lumen WRGBU Wide, Red, RGB, Blue, UV Video with 6000 Lumen Burst Light

NEW! The Hydra 4000 packs an extremely bright 4000 lumen constant, and 6000 lumen burst into a compact package! We’ve upgraded from dual buttons to a three button design which makes controlling the light easier than ever before. We’ve included RGB led’s too so you can get all of the creating lighting options you might need. The Hydra 4000 is an excellent choice for a wide range of shooters.

One of the most exciting features of the new Hydra 4000 is the ability to charge via USB C. The included charger contains 3 ports, with the capability to charge up to two batteries simultaneously, plus an additional port to conveniently charge a phone, camera, or tablet – helping to streamline your gear when travelling! The charger is the latest in GaN technology, meaning it’s incredibly small, but still outputs 90 watts!

Both ball and YS mounts are also included. In the event of accidental flood, the head of the Hydra 4000 is water resistant if removed from water immediately. Remote control capable like all lights in the Hydra series – just add the remote control and fiber optic cables when you’re ready.

*Camera body, Sigma 15mm f2.8 EX DG fisheye lens and Metabones/Sigma MC-11 adapter not included

Mirrorless and DSLR System Package Features
Camera Body Included:
Macro Ready:
Wide Angle Ready:
Key Camera Features:
61MP / 4K UHD Video / Full-Frame Mirrorless
Ports Included :
140mm Optical Glass Dome
Max Light Output:
Beam Angle:
80° / 100°, 120° w/ Diffusers
Color Temp:
Light Features:
(Up to) 200 Flashes at Full Power, Manual and TTL
Includes Focus Light:
Kraken 3500S+
Includes Leak Detection/Vacuum System:
Arm Length(s):
8in + 5in
Depth Rating:
100m / 330ft


  • 17427 Nauticam NA-a2020 Housing
  • 37305 Nauticam N100-N120 Adapter with zoom control
  • 18810 Nauticam 140mm Optical Glass Dome
  • 19546 Sigma 15mm f2.8 Zoom Gear
  • 25625 M16 Vacuum Valve
  • 26302 Mini Flash Trigger for Sony
  • 2 x Inon Z330 Strobes
  • Kraken Hydra 4000 Focus/Video Light
  • 25221 M10 Housing Ball Mount
  • 2x AD-IN Inon Ball Mounts
  • 2 x Nauticam 8" arms & 5" arms
  • 7 x Nauticam Clamps
  • 2 x Nauticam Fiber Optic Sync Cords
  • 28130 Nauticam Hand Strap

Housing Specifications

  • Dimensions: 339mm(W) x 170mm(H) x 123mm(D)
  • Weight In Air: 2.71kg
  • Weight in Water: 0.63kg
  • Depth Rating: 100m
  • Port Mount: N100
  • Compatible Cameras: Sony a7R IV and Sony a9 II
I ended up with far more keepers than normal. I continue to be impressed with Nauticam housings and Sony cameras, and this was without a doubt the easiest and most rewarding photo week yet!
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