Extension Ring 40mm AX to AX Port Mount
AOI 40mm Extension Ring for AX Port Mount Housing
Enhance your underwater photography setup with the AOI ER-AX_AX-40, a precision-engineered 40mm extension ring designed for the AX port mount housing system. This extension ring allows for optimal lens positioning, ensuring superior image quality and compatibility with various lens configurations.
Key Features:
- Durable Construction: Made from PC + GF (polycarbonate + glass fiber) for enhanced strength and resistance to underwater conditions.
- Precise Dimensions: Measures 134mm in diameter and 55.3mm in height, providing the exact extension needed for specific lens setups.
- Lightweight Design: Weighs only 233.5g, minimizing additional bulk to your underwater rig.
- Included Accessories: Comes with a front lens cap (LFC-101) and rear lens cap (LRC-101) for protection during transport and storage.
Compatibility:
The AOI ER-AX_AX-40 is specifically designed for use with the AX port mount housing system, ensuring seamless integration and optimal performance with compatible lenses.
Why Choose the AOI ER-AX_AX-40?
Ideal for underwater photographers seeking precise control over their lens configurations, the AOI ER-AX_AX-40 offers a combination of durability, compatibility, and ease of use. Its lightweight design and included protective caps make it a practical addition to your underwater photography gear.
Product Information
Product Information
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Shipping & Returns


Extension Ring 40mm AX to AX Port Mount
Extension Ring 40mm AX to AX Port Mount
AOI 40mm Extension Ring for AX Port Mount Housing
Enhance your underwater photography setup with the AOI ER-AX_AX-40, a precision-engineered 40mm extension ring designed for the AX port mount housing system. This extension ring allows for optimal lens positioning, ensuring superior image quality and compatibility with various lens configurations.
Key Features:
- Durable Construction: Made from PC + GF (polycarbonate + glass fiber) for enhanced strength and resistance to underwater conditions.
- Precise Dimensions: Measures 134mm in diameter and 55.3mm in height, providing the exact extension needed for specific lens setups.
- Lightweight Design: Weighs only 233.5g, minimizing additional bulk to your underwater rig.
- Included Accessories: Comes with a front lens cap (LFC-101) and rear lens cap (LRC-101) for protection during transport and storage.
Compatibility:
The AOI ER-AX_AX-40 is specifically designed for use with the AX port mount housing system, ensuring seamless integration and optimal performance with compatible lenses.
Why Choose the AOI ER-AX_AX-40?
Ideal for underwater photographers seeking precise control over their lens configurations, the AOI ER-AX_AX-40 offers a combination of durability, compatibility, and ease of use. Its lightweight design and included protective caps make it a practical addition to your underwater photography gear.
Original: $238.56
-70%$238.56
$71.57Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
AOI 40mm Extension Ring for AX Port Mount Housing
Enhance your underwater photography setup with the AOI ER-AX_AX-40, a precision-engineered 40mm extension ring designed for the AX port mount housing system. This extension ring allows for optimal lens positioning, ensuring superior image quality and compatibility with various lens configurations.
Key Features:
- Durable Construction: Made from PC + GF (polycarbonate + glass fiber) for enhanced strength and resistance to underwater conditions.
- Precise Dimensions: Measures 134mm in diameter and 55.3mm in height, providing the exact extension needed for specific lens setups.
- Lightweight Design: Weighs only 233.5g, minimizing additional bulk to your underwater rig.
- Included Accessories: Comes with a front lens cap (LFC-101) and rear lens cap (LRC-101) for protection during transport and storage.
Compatibility:
The AOI ER-AX_AX-40 is specifically designed for use with the AX port mount housing system, ensuring seamless integration and optimal performance with compatible lenses.
Why Choose the AOI ER-AX_AX-40?
Ideal for underwater photographers seeking precise control over their lens configurations, the AOI ER-AX_AX-40 offers a combination of durability, compatibility, and ease of use. Its lightweight design and included protective caps make it a practical addition to your underwater photography gear.

















