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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.
Nauticam Mini extension ring 17 [36617]€230.00 €190.08In stockNauticam Mini extension ring 17 [36617] Learn More
Ikelite MIL 2.25"lensport extension #5516.70€253.00 €209.09Backorder. Ready for shipment in 2-5 working daysThis Ikelite Lens Extension Extends a Mirrorless Flat Port for use with longer lenses like the Canon 100mm IS USM Macro lens. Learn More![Nauticam N100 Extension Ring 50 [37403]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/3/7/37403.jpg)
Nauticam N100 Extension Ring 50 [37403]€366.00 €302.48In stockNauticam N100 Extension Ring 50 [37403] Learn More![Sea&Sea ML extension ring 25 [30122]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/s/s/ss30122.jpg)
Sea&Sea ML extension ring 25 [30122]€249.00 €205.79Backorder. Ready for shipment in 2-5 working daysSea&Sea ML extension ring 25 [30122] Learn More
Ikelite DL 20mm lens port extension #75020€258.75 €213.84In stockIkelite DL 20mm lens port extension #75020 Learn More
Ikelite DL 28mm lens port extension #75028€258.75 €213.84In stockIkelite DL 26mm (1,025 inch) lens port extension #75028 Learn More
Ikelite DL 42mm lens port extension #75042€287.50 €237.60In stockIkelite DL 42mm lens port extension #75042 Learn More
Ikelite DL 50mm lens port extension #75050€316.25 €261.36In stockIkelite DL 50mm lens port extension #75050 Learn More
AOI Extension Ring 52mm OM-D port to OM-D housing€219.00 €180.99In stock52mm Extension ring ( OM-D to OM-D )
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AOI Extension Ring 34mm PEN port to PEN housingSpecial Price €185.00 €152.89 Regular Price €195.00In stock34mm Extension ring ( PEN to PEN )
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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.