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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.
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Focus and zoom gears for underwater lenses
Gears are control rings that allow manual focus or zoom operation of lenses inside underwater housings. This enables precise manual lens adjustment underwater.
The correct gear depends on the specific lens and housing system. Compatibility charts indicate which gear is required for each setup.
Determining the correct gear
Lens type, housing brand and port design all affect gear selection. Using the wrong gear can prevent smooth operation or alignment inside the housing.
- Focus gears allow precise manual focusing
- Zoom gears control variable focal length lenses
Gear compatibility with ports and extension rings
Each gear must be matched with the correct port and any required extension rings. This ensures full access to the chosen lens inside the underwater housing.
For detailed compatibility, see the ports category and consult the port charts to confirm the required gear and accessories.
- Transmit focus and zoom control externally
- Required for precise underwater lens use
- Gear choice depends on lens and housing
- Matched with ports and extension rings
- Listed in detailed port compatibility charts
Zoom and focus gears are part of a complete port system. Learn how all components work together in our guide on underwater port systems.
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,