Nauticam 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, the port configuration for the Sigma 15mm f2.8 EX DG fisheye lens, and a Kraken 3500S+ focus 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 the port configuration for the Sigma 15mm f2.8 EX DG fisheye lens. Also included in the package is a mini flash trigger, Kraken Hydra 3500S+ 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

Hydra-3500+S-RGB 3500 Wide, Spot, Red, Green, Blue, Mixed and UV and 4500 Lumen Strobe Light

The Kraken Hydra-3500+S-RGB 3500 Wide, Spot, Red, Green, Blue, Mixed and UV has 2 buttons for ease of use, a water resistant light head for flood protection, as well as spot, flood and red beams. It features a COB LED for the best, and most uniform, flood beams for your photography and video needs.

New is the ability of the light to burst quickly to 4500 lumens when triggered by a fiber optic sync cord (not included) from your camera flash, working much like an external strobe.

This 3500+S Video Light now features RGB LED’s in addition to everything else so now you have 9 different color options for creative lighting! If you’re a macro shooter this is the light for you! It can be used as a regular dive light, or as a focus or video light as well. Divers who want to shoot fluorescent photography will have a strong light source. The two button layout mean that you use one button to select the mode, and the other to select the output level. No hard-to-remember sequences on a single button. All of the lights utilize multi-cell battery packs, with quality, fast chargers. Recharge time is about 3 hours from a completely drained state. Extra battery packs are available.

The Kraken Hydra lights come in a complete set that includes ball and YS style mounts, spare orings, charger and a carrying case.

*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 3500S+ Focus/Video Light
  • 25221 M10 Housing Ball Mount
  • 2x 25514 Inon Ball Mount
  • 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
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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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