Nauticam NA-S5II Underwater Housing
For the Panasonic Lumix S5II / S5IIX
The NA-S5II brings Panasonic's value-packed full-frame hybrid underwater — a 24MP sensor with dual native ISO, class-leading stabilisation and a built-in cooling fan for long video takes. Built on Nauticam's N120 port system, it runs native L-mount glass (and adapted Canon/Sigma EF lenses), adds a one-hand rotary housing lock, and ships with vacuum and leak monitoring as standard.
Consider the NA-S5II if you:
- Want strong-value full-frame stills and video — 24MP, dual native ISO, superb in-body stabilisation
- Shoot long video takes and want the camera's built-in cooling fan (unlimited 4K internal)
- Run native L-mount glass, or adapt Canon/Sigma EF lenses via the Sigma MC-21
- Want a compact rig with a one-hand rotary lock and reliable safety monitoring
At a Glance
| Dimensions | 316 × 172 × 165 mm (W × H × D) |
| Depth Rating | 100 m |
| Weight in air | 2.4 kg |
| Weight in water | Positive 0.3 kg buoyancy (incl. camera and battery) |
| Port Opening | N120 |
| Compatible cameras | Panasonic Lumix S5II and S5IIX |
The Camera: Panasonic Lumix S5II / S5IIX
New to the S5II? Here's the context. Already know it well — skip to the housing below.
The Lumix S5II delivers remarkable value: a feature-rich, full-frame platform in a compact body. A 24.2MP sensor (no low-pass filter) pairs with Dual Native ISO for cleaner high-ISO performance, while Panasonic's in-body stabilisation makes handheld video exceptionally smooth. A built-in cooling fan removes the overheating limits seen on rival hybrids — allowing unlimited 4K internal recording in 10-bit — and the much-improved phase-hybrid AF is a big step forward. The S5IIX adds HDMI ProRes RAW / ProRes 422 output and direct-to-SSD recording via USB-C at up to 800Mbps.
Key camera specifications
- 24.2MP full-frame sensor (no LPF); 96MP high-res mode
- Dual Native ISO; ISO 100–51,200 (expandable 50–204,800)
- 5-axis IBIS (5-stop) plus Active I.S. (6.5-stop)
- Phase-hybrid AF, 779 points, EV -6 to 18
- Built-in cooling fan: unlimited 4K 10-bit internal; 6K 30p up to 30 min
- S5IIX adds HDMI ProRes RAW / ProRes 422 and direct-to-SSD via USB-C (up to 800Mbps), plus 5.8K / C4K / 3.3K
The Housing
Lens compatibility and the N120 port system
The NA-S5II is built on Nauticam's N120 port system. Native L-mount lenses are supported directly, and Sigma's MC-21 EF-to-L adapter lets you use Canon and Sigma EF-mount lenses — the housing is designed to work with the existing focus and zoom gears, extension rings and port combinations from the Nauticam Canon N120 system for those lenses. As more L-mount lenses suited to underwater use appear, they'll be added to the system; check the port chart for full compatibility.
Worth noting: the NA-S5II uses the rotary housing lock now standard on Nauticam's more compact mirrorless housings, so you can open and close the housing with one hand.
Mission Control: every control within reach
Nauticam's Mission Control philosophy places essential controls where they're needed — close to the handles and within natural reach — so you can stay on composition and timing without taking your eye off the EVF or LCD. A thumb lever on the right rear comfortably reaches AF-On without letting go of the handle, an additional rear lever switches focus mode between C / S / MF, and a multi-directional pad navigates menus and moves focus points.
Flash triggering
For rapid-fire manual flash triggering, the NA-S5II works with the Mini Flash Trigger (26305), which uses small LEDs to fire external strobes through Nauticam Universal Fiber Optic Cables (26216).
Worth noting: the Panasonic DMW-FL70 flash is not supported within the housing.
Vacuum check and leak detection — standard
Nauticam's vacuum check and leak detection electronics ship with the NA-S5II as standard. Combined with the optional 25624 M14 Vacuum Valve II, the system continuously reports the housing's watertight, safe-to-dive status through a color-coded LED: solid vacuum, or vacuum loss. Leak detection runs on the same circuit, so any water intrusion triggers an audible and visual alarm.
The system is temperature-compensated, so it won't throw false alarms from a change in water temperature or from the camera heating up on an action-packed dive.
What's in the Box
- NA-S5II Housing
- 90136 Spare main O-ring, O-ring remover and lubricant
- 2× Plugs for optical fiber cable mount
- 2× Handles with mounting balls
- Panasonic CR-2032 battery (for moisture alarm)
- Set of Allen keys
- Manual instruction card
- Padded housing bag and shoulder strap
Optional Accessories
Vacuum valves
- 25624 M14 Vacuum Valve II (pushbutton release)
Viewfinders (32212 / 32214 preferred)
- 32211 Full Frame Straight Viewfinder 32° / 1:1
- 32212 Full Frame Straight Viewfinder 40° / 0.8:1
- 32213 Full Frame Angle Viewfinder 32° / 1:1
- 32214 Full Frame Angle Viewfinder 40° / 0.8:1
Triggering, cables and bulkheads
- 26305 Mini Flash Trigger for Panasonic/Fuji/Canon
- 26216 Universal Optical Fiber Cable
- 25081 M24-M16 Step Down Adaptor
- 25097 M24-M14 Step Down Adaptor
- 25019 M16 to M14 step down adaptor for electrical bulkhead
Mounting Accessories
- 25221 M10 strobe mounting ball for housing
- 25224 M10 strobe mounting ball for housing (with hole for lanyard use)
- 17959 Housing mounting ball with 1/4" screws
- 17960 Universal Quadra-Pod Plate for Nauticam Housings
- 25218 Mounting Ball Set for tripod
HDMI Configurations
HDMI 2.0 cable system
Compatible HDMI 2.0 monitor housings
- 17922 Nauticam Atomos Ninja V Housing — Atomos Ninja V 5" 4Kp60 4:2:2 10-bit Recorder/Monitor/Player (excl. HDMI 2.0 cable)
- 17922S Nauticam Atomos Ninja V-S Housing — as above, with Atomos AtomX SDI Module
HDMI 1.4 cable system
- 25033 Standard HDMI bulkhead with M16 thread
- 25081 M24-M16 Step Down Adaptor
- 25100 HDMI (D-A) cable, 190mm
Compatible HDMI 1.4 monitor housings
- 17923 NA-Shinobi-H Housing for Atomos Shinobi 5.2" 4K HDMI Monitor (HDMI 1.4 input)
- 17925 NA-503-H Housing for SmallHD 503 UltraBright On-Camera Monitor
