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Choosing the right port system for your underwater housing is essential for achieving sharp, distortion-free images underwater. Whether you shoot wide-angle or macro, your port setup directly affects image quality, field of view, and usability.
In this guide, we explain how underwater port systems work, the difference between dome and flat ports, and how to choose the right port for your specific camera and lens combination.
What are underwater port systems?
An underwater port system is the front part of your underwater housing that allows your camera lens to function properly underwater. Different lenses require different ports to maintain image quality and correct optical performance.
A complete port system may include:
- A dome port or flat port
- Extension rings
- Zoom or focus gears
Choosing the right combination ensures your lens performs as intended beneath the surface.
Looking for the right components for your setup? Browse our range of underwater lenses and port systems to find compatible ports, extensions, and accessories.
Dome ports vs flat ports
The two main types of underwater ports are dome ports and flat ports. Each type is designed for a specific purpose and lens type.
Dome ports are typically used for wide-angle photography, allowing you to capture a larger field of view and reduce distortion underwater. Flat ports are better suited for macro and close-up photography, offering sharper results for small subjects.
Want to understand the differences in detail? Read our guide on dome ports vs flat ports.
Choosing the right port for your lens
Selecting the correct port depends on your camera and lens combination. Factors such as focal length, lens type, and housing system all play a role.
Wide-angle lenses typically require dome ports, while macro lenses perform best behind flat ports. In many cases, extension rings are needed to position the port correctly in front of the lens.
Not sure which dome port is right for your setup? Read our detailed guide on how to choose the right dome port for your camera and lenses.
Port charts and compatibility explained
To determine exactly which port, extension ring, and gear you need, manufacturers provide port charts. These charts match specific lenses to compatible ports and accessories.
Using port charts ensures your setup is fully compatible and avoids issues with focus, zoom, or image quality underwater.
Looking for brand-specific compatibility? Use the guides below:
Need help choosing your underwater port system?
Choosing the right port system can be complex, especially when combining different lenses, housings, and accessories. Our team is happy to help you find the right setup for your camera.
Still unsure where to start? Learn more about building a complete setup in our guide on how to choose the right underwater housing. Choosing the right port system is just as important as selecting the right underwater housing, as it directly impacts image quality and performance.
