Gears

Focus and Zoom Gears for Underwater Lenses

Focus and zoom gears are mechanical rings placed around a lens to transmit movement to an underwater housing’s external controls. This enables manual lens adjustment below the surface.

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