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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.
Gears
Gears are control rings that allow manual focus or zoom operation of lenses inside underwater housings. They are essential for precise handling during a dive.
Ikelite DL zoom gear retainer #75900€57.50 €47.52Backorder. Ready for shipment in 1 to 2 weeksIkelite DL zoom gear retainer #75900 Learn More![Nauticam C1635II-Z Canon EF 16-35mm f/2.8L III USM [19554]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/1/9/19554.jpg)
Nauticam C1635III-Z Canon EF 16-35mm f/2.8L III USM [19554]€240.00 €198.35Backorder. Ready for shipment in 1 to 2 weeksNauticam C1635II-Z Canon EF 16-35mm f/2.8L III USM [19554] Learn More![Nauticam SN105-F Focus gear for Sigma 105 F2.8 EX DG OS HSM [19147]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/1/9/19147.jpg)
Nauticam SN105-F Focus gear for Sigma 105 F2.8 EX DG OS HSM€190.00 €157.02Replaced by a newer model. See link below...Nauticam SN105-F Focus gear for Sigma 105 F2.8 EX DG OS HSM Learn More![Nauticam SC1835f1.8-Z Zoom gear for Sigma 18-35 F1.8 DC HSM [19552]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/1/9/19552.jpg)
Nauticam SC1835f1.8-Z Zoom gear for Sigma 18-35 F1.8 DC HSM€190.00 €157.02Replaced by a newer model. See link below...Nauticam SC1835f1.8-Z Zoom gear for Sigma 18-35 F1.8 DC HSM Learn More![Nauticam SC105-F Focus gear for Sigma 105 F2.8 EX DG OS HSM [19553]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/1/9/19553.jpg)
Nauticam SC105-F Focus gear for Sigma 105 F2.8 EX DG OS HSM€260.00 €214.88Backorder. Ready for shipment in 1 to 2 weeksNauticam SC105-F Focus gear for Sigma 105 F2.8 EX DG OS HSM Learn More![Sea&Sea zoom gear for SEL1635Z [31177]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/s/s/ss31177.jpg)
Sea&Sea zoom gear for SEL1635Z [31177]€295.00 €243.80Backorder. Ready for shipment in 2-5 working daysSea&Sea zoom gear for SEL1635Z [31177] Learn More
Ikelite zoom/focus gear 5509.15€28.75 €23.76Backorder. Ready for shipment in 1 to 2 weeksIkelite Zoom sleeve for Canon EF 24-105 F4-II #5509.15 Learn More
Nauticam Gear Set for Canon EF 16-35mm f/2.8L III USM€680.10 €562.07Replaced by a newer model. See link below...Cinema System Gear Set (zoom and focus gear) for Canon EF 16-35mm f/2.8L III USM
Learn More![Nauticam CM1545-Z Zoom Gear for Canon EF-M 15-45mm [36195]](https://www.uwcamerastore.com/media/catalog/product/cache/585a9f53153ae04cde57614e2eac8117/3/6/36195.jpg)
Nauticam CM1545-Z Zoom Gear for Canon EF-M 15-45mm€300.00 €247.93Special order product, non-cancelable, non-returnable !Nauticam CM1545-Z Zoom Gear voor Canon EF-M 15-45mm Learn More
Nauticam N2870f3.5D-Z Zoom Gear for Nikon 28-70mm f/3.5-4.5D€190.00 €157.02Replaced by a newer model. See link below...Nauticam N2870f3.5D-Z Zoom Gear for Nikon 28-70mm f/3.5-4.5D
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Frequently asked questions about gears for underwater housings
What is a gear for an underwater housing?
A gear is a ring placed around a lens that allows you to control focus or zoom through the external controls of an underwater housing.
Do I need a gear for every lens?
Not always. Some lenses can be used without a gear, but for manual focus or zoom control, a compatible gear is required.
What is the difference between a focus gear and a zoom gear?
A focus gear is used to manually adjust focus, while a zoom gear allows you to change focal length on zoom lenses.
How do I know which gear I need for my underwater housing?
You can use port charts to find the correct gear for your specific lens, port and underwater housing.
Are gears brand specific?
Yes, gears are designed for specific lenses and underwater housing systems. Always check compatibility before choosing a gear.
Related articles about gears 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,