Nauticam NA-A7CII Underwater Housing
For the Sony α7C II and α7C R
The NA-A7CII takes Sony's ultra-compact full-frame bodies underwater — 33MP (α7C II) or 61MP (α7C R) in the smallest full-frame package — in a lightweight, travel-friendly housing. Built on Nauticam's N100 port system, it puts the key controls at your fingertips and ships with vacuum and leak monitoring as standard.
Consider the NA-A7CII if you:
- Want Sony's ultra-compact full-frame — 33MP (α7C II) or 61MP (α7C R) in the smallest body
- Want a lightweight, travel-friendly rig (1.9 kg housing)
- Shoot Sony FE glass (or EF via adapters) on the N100 system with WWL-1B / WACP-1B optics
- Need reliable safety monitoring for demanding dives
At a Glance
| Dimensions | 316 × 173 × 109 mm (W × H × D) |
| Depth Rating | 100 m |
| Weight in air | 1.9 kg |
| Weight in water | Negative 0.3 kg (incl. camera) |
| Port Opening | N100 |
| Compatible cameras | Sony α7C II, Sony α7C R |
The Camera: Sony α7C II and α7C R
New to these bodies? Here's the context. Already know them well — skip to the housing below.
The α7C II and α7C R are Sony's ultra-compact full-frame bodies — the same diminutive form factor with two different sensors. The α7C II uses a 33MP back-illuminated Exmor R sensor with 4K 4:2:2 10-bit recording up to 60p and 10fps continuous shooting; the α7C R packs the 61MP Exmor R sensor with up to 7-stop stabilisation and 8fps shooting. Both share an XGA OLED EVF with a 120fps display and wide-area 759-point phase-detection autofocus.
Key α7C II specifications
- 33MP full-frame back-illuminated Exmor R CMOS sensor
- 4K 4:2:2 10-bit recording up to 60p / 50p
- XGA OLED EVF with 120fps display
- 759-point wide-area phase-detection AF
- Up to 10fps continuous shooting with AF/AE tracking
Key α7C R specifications
- 61MP full-frame Exmor R sensor
- 5-axis IBIS with up to 7-stop compensation
- XGA OLED EVF with 120fps display
- 759-point wide-area phase-detection AF
- Up to 8fps continuous shooting with AF/AE tracking
The Housing
Lens compatibility and the N100 port system
The NA-A7CII is built around Nauticam's N100 port system. Alongside conventional ports, it pairs with Nauticam's pioneering optical accessories — magnifying viewfinders, super-macro accessory lenses, and the WWL-1B and WACP-1B water-contact wide-angle lenses — to form a complete imaging system. The camera drops in without any control presetting, and port changes are effortless. N100-to-N120 adapters extend port compatibility further.
Mission Control: every control within reach
The NA-A7CII features an integrated handle system that gives excellent control access even with thick gloves, with ideal placement of the shutter release and a thumb lever to actuate AF-On from the right handle. The housing is machined from a solid block of aluminium and hard-anodised against salt-water corrosion, with marine-grade stainless and plastic parts, backed by a two-year warranty against manufacturing defects.
Flash triggering
Reliable rapid-fire manual flash triggering is available using the LED Flash Trigger (26302) — the housing comes fiber-optic ready and accepts the Universal Fiber Optic Cable (26216). Strobes and light arms attach via the included 1" accessory mounting balls. Electrical triggering remains an option for legacy lighting, using an accessory electrical bulkhead (25056).
Vacuum check and leak detection — standard
Nauticam's vacuum check and leak detection electronics ship with the NA-A7CII 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.
What's in the Box
- NA-A7CII Housing
- Housing cap
- 2× Optical bulkhead caps
- 2× Handles with mounting balls and 2× handle brackets
- Panasonic CR-2032 battery (pre-installed, for moisture alarm)
- Spare 90139 O-ring, O-ring remover and lubricant
- Set of Allen keys
- Manual instruction card
- Padded housing bag and shoulder strap
Optional Accessories
Vacuum valves
- 25624 M14 Vacuum Valve II (pushbutton release)
N100–N120 port adapters
Viewfinders (32212 / 32214 preferred; 32211/12/13/14 require the 32215 viewfinder collar for MIL housings)
- 32205 Nauticam 45° viewfinder for MIL housing
- 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
- 32215 Viewfinder collar for MIL housing (required for 32211/12/13/14)
Triggering, cables and bulkheads
- 26302 LED Flash Trigger for Sony
- 26216 Universal Optical Fiber Cable
- 25056 M14 Nikonos 5-pin bulkhead with universal hotshoe connection
Surface power (compatible from SN A599661)
Mounting Accessories
- 25221 M10 strobe mounting ball for housing
HDMI Configurations
HDMI 1.4 cable system
- 25033 Standard HDMI bulkhead with M16 thread
- 25046 HDMI (D-D) cable, 200mm (from HDMI bulkhead to camera)
- 26326 M24-M16 Adaptor (for use with 26325)
Compatible HDMI 1.4 monitor housings
- 17922 Nauticam Atomos Ninja V Housing (requires 25082 cable)
- 17923 NA-Shinobi-H Housing for Atomos Shinobi 5.2" 4K HDMI Monitor (HDMI 1.4 input; includes 25046)
- 17926 Nauticam NA-Ultra5 Housing for SmallHD Ultra 5 Camera Monitor (requires 25082 cable)
