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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.
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![Nauticam N200 extension ring 16 [16416]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/1/6/16416-.png)
Nauticam N200 extension ring 16 [16416]€630.00 €520.66Backorder. Ready for shipment in 1 to 2 weeksNauticam N200 extension ring 16 [16416]
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Nauticam N85 Extension Ring 26 for OM M.Zuiko Digital MC-20€279.00 €230.58In stockN85 Extension Ring 26 for OM M.Zuiko Digital MC-20
Learn More![Nauticam N120 extension ring 20 II [22120]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/n/a/na22120.png)
Nauticam N120 extension ring 20 II [22120]€530.00 €438.02Backorder. Ready for shipment in 1 to 2 weeksN120 extension ring 20 II [22120]
Learn More![Nauticam N120 extension ring 25 II [22125]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/n/a/na22125.png)
Nauticam N120 extension ring 25 II [22125]€540.00 €446.28In stockN120 extension ring 25 II [22125]
Learn More![Nauticam N120 extension ring 40 II [22140]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/n/a/na22140-1.png)
Nauticam N120 extension ring 40 II [22140]€590.00 €487.60In stockNauticam N120 extension ring 40 II [22140] Learn More![Nauticam N120 extension ring 70 II [22170]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/n/a/na22170-1.png)
Nauticam N120 extension ring 70 II [22170]€650.00 €537.19In stockNauticam N120 extension ring 70 II [22170] Learn More
Nauticam N120 extension ring 60 II [22160]€630.00 €520.66In stockNauticam N120 extension ring 60 II
Learn More![Nauticam N100 Extension Ring 50 II [37433]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/o/n/ontwerp_zonder_titel_4__2.png)
Nauticam N100 Extension Ring 50 II [37433]€480.00 €396.69Backorder. Ready for shipment in 1 to 2 weeksNauticam N100 Extension Ring 50 II [ 37433 ]
Learn More![Nauticam N200 extension ring 50 [16404]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/n/a/na16404.png)
Nauticam N200 extension ring 50 [16404]€1,000.00 €826.45Backorder. Ready for shipment in 1 to 2 weeksThe N200 Extension Ring 50 is part of the N200 Port System and can be used to add 50mm effective length to an N200 Port setup.
Learn More![Nauticam N200 extension ring 40 [16403]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/n/a/na16403.png)
Nauticam N200 extension ring 40 [16403]€930.00 €768.60Backorder. Ready for shipment in 1 to 2 weeksThe N200 Extension Ring 40 is part of the N200 Port System and can be used to add 40mm effective length to an N200 Port setup.
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Frequently asked questions about extension rings
What is an extension ring for an underwater housing?
An extension ring is used to position your lens correctly inside the port. It sits between the underwater housing and the port.
Do I always need an extension ring for an underwater housing?
No, not always. Whether you need an extension ring depends on your lens and port combination. This can be checked in the port charts.
How do I know which extension ring I need for my underwater housing?
You can use port charts to find the correct extension ring for your specific lens and underwater housing.
Are extension rings brand specific?
Yes, extension rings are designed for specific brands and port systems. Always make sure the extension ring matches your housing and port system.
Can I use the wrong extension ring on my underwater housing?
Using the wrong extension ring can lead to poor image quality, such as softness or distortion. Always follow the recommended setup.
Related articles about extension rings for underwater housings
- Posted: March 17, 2026Categories: Underwater HousingsRead more »
- Posted: August 26, 2024Categories: Underwater Housings
Read more »AOI underwater housings are compact, lightweight, and ergonomic. Depending on the lens you want to use with your camera, you'll need a matching AOI port, gear and AOI extension ring. AOI has created port charts where you can look up exactly which items you need to start underwater photography with your lens in the underwater housing.
- Posted: March 06, 2024Categories: Underwater Housings
Read more »Many Nauticam housings provide interchangeable ports, enabling the use of various lenses. However, different lenses may demand distinct ports and extension rings to maintain or correct for underwater optics. Certain lenses permit access to zoom and manual focus functions while inside the housing,
- Posted: March 05, 2024Categories: Underwater Housings
Read more »Ikelite has evaluated most popular lenses, provided they are well suited for use underwater. Their recommendations for lens ports can be found in the lens port charts. First, you need to know which mount your underwater housing has.