DNC-2191 M24 HDMI Full-Size Rotatable Elbow Bulkhead Connector for Nauticam NA-C70 | Canon EOS C70

DNC-2191 M24 HDMI Swivel Bulkhead Connector for Nauticam NA-C70

Designed for Canon EOS C70 Underwater Housing

The DNC-2191 is a precision-engineered underwater HDMI bulkhead connector developed specifically for the Nauticam NA-C70 underwater housing and the Canon EOS C70 cinema camera. It is designed for professional underwater video applications where secure cable routing, mechanical reliability, and system safety are critical.

Unique Swivel Elbow Design – Built for Real-World Use

One of the key advantages of the DNC-2191 is its rotatable 90-degree (elbow) HDMI connector.

This swivel design allows the connector to be installed in the preferred orientation, ensuring that an external underwater HDMI cable or Dive And See HDMI monitor connects horizontally rather than vertically.

Horizontal cable routing provides major real-world benefits:

• Reduces bending stress on the external HDMI cable
• Prevents downward cable pull on the bulkhead connector
• Improves strain relief when using long or heavy underwater HDMI cables
• Creates a cleaner, more secure connection in underwater environments

This design is especially important when using surface HDMI cables, long cable runs, or underwater monitors, where vertical cable orientation can cause unnecessary mechanical stress.

Extra-Flexible Internal HDMI Cable (21 cm)

The internal HDMI cable is slightly longer (21 cm) and manufactured using a very flexible, fine-strand HDMI cable, specifically selected for underwater housings.

This flexibility allows:

• Smooth and natural routing inside the housing
• Reduced mechanical stress on the camera’s HDMI port
• Easier installation and servicing
• Better tolerance to vibration and movement during operation

Unlike stiff HDMI cables that can push against the camera or housing walls, the DNC-2191 cable naturally follows the internal layout of the Nauticam NA-C70 housing, improving long-term reliability.

Water Block Technology – Critical for System Safety

The DNC-2191 features integrated Water Block Technology, an essential safety feature for professional underwater systems.

The built-in water block serves two critical functions:

• Maintains housing vacuum integrity when used with systems such as Airlock Vacuum System
• Prevents water ingress, ensuring that water cannot travel through the bulkhead into the housing if there is a failure or improper connection of the external HDMI cable

This design significantly reduces the risk of camera damage and protects internal electronics in the event of external cable or connector issues.

Built for Professional Underwater Production

• Full-size HDMI Type-A connector
• M24 × 1 threaded bulkhead, compatible with Nauticam NA-C70
• Rotatable 90-degree elbow design for horizontal external cable routing
• Marine-grade aluminum body with hard-anodized coating
• Gold-plated contacts for stable, low-loss signal transmission
• Designed to transmit 1080p60 and some 4K HDMI signals (camera dependent)
• Compatible with Dive And See underwater HDMI cables for surface monitoring, recording, or live streaming
• Compatible with fiber-optic HDMI systems (such as DNC-1034) for long-distance transmission up to 100 m
• Depth-rated to 160 meters / 240 PSI
• Protective cap included