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Extension Rings

Extension rings are used to fine-tune the distance between a port and an underwater housing to fit lenses of different sizes. To find the right extension rings for your lens, contact us at Bluewater Photo!

72 of 131 Items
  • Nauticam N120 Extension Ring 25 II Nauticam N120 Extension Ring 25 II

    Nauticam N120 Extension Ring 25 II

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-22125

    Nauticam N120 Extension Ring 25 II   Product Overview: The Nauticam N120 Extension Ring 25 II has been designed to extend the ports by 25mm   Check out Nauticam Port Chart   We offer lifetime support with all purchases.Please call or...

    $457.00
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  • Nauticam N120 Extension Ring 20 II

    Nauticam N120 Extension Ring 20 II

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-22120

    Nauticam N120 Extension Ring 20 II   Product Overview: The Nauticam N120 Extension Ring 20 II has been designed to extend the ports by 20mm and popularly used with lenses such as Tokina 10-17mm FE Lens to place the dome in the proper optical...

    $448.00
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  • Nauticam N120 Extension Ring 10 II

    Nauticam N120 Extension Ring 10 II

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-22110

    Nauticam N120 Extension Ring 10 II   Product Overview: The Nauticam N120 Extension Ring 10 II has been designed to extend the ports by 10mm and popularly used with these lenses to place the dome in the proper position optically. Compatible with the...

    $246.00
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  • Isotta 90mm Extension Ring B120

    Isotta 90mm Extension Ring B120

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: ISO-0230

    Isotta 90mm Extension Ring B120 for Isotta Housings   The Isotta 90mm Extension Ring B120 has 102mm bayonet and is designed to be used with Isotta housings. It is built from black anodized material which is durable yet lightweight. It provides an...

    $253.00
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  • Marelux Sea and Sea to Marelux Extension Ring 20

    Sea & Sea to Marelux Extension Ring 20

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: MX-31702

    Sea & Sea to Marelux Extension Ring 20 Canon EF 11-24mm F4 Lens Not Supported Product Overview: The Sea & Sea to Marelux Extension Ring 20 extends your port system by 20mm and allows you to use your Sea & Sea ports with your Marelux...

    $200.00
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  • Marelux Nauticam to Marelux Extension Ring 20

    Nauticam to Marelux Extension Ring 20

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: MX-31701

    Nauticam to Marelux Extension Ring 20 Canon EF 11-24mm F4 Lens Not Supported Product Overview: The Nauticam to Marelux Extension Ring 20 extends your port system by 20mm and allows you to use your Nauticam ports with your Marelux housing.  ...

    $200.00
    Add to Cart
  • Isotta 50mm Extension Ring B120

    Isotta 50mm Extension Ring B120

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: ISO-207

    Isotta 50mm Extension Ring B120 for Isotta Housings   The Isotta 50mm Extension Ring B120 has 102mm bayonet and is designed to be used with Isotta housings. It is built from black anodized material which is durable yet lightweight. It provides an...

    $205.00
    Add to Cart
  • Nauticam N85 to N120 34.7MM Port Adaptor

    Nauticam N85 to N120 34.7MM Port Adaptor

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-36064

    Nauticam N85 to N120 34.7MM Port Adaptor For Metabones EF-MFT Mount T Speed Booster Ultra 0.71x *Discontinued Part #: Nau-36064 Product Overview: The adaptor is designed to convert N85 port opening to N120 with the used of Metabones EF-MFT Mount T...

    $544.00
  • Isotta Extension Ring with Zoom for Nikon Z7, Z6 Isotta Extension Ring with Zoom for Nikon Z7, Z6 Isotta Extension Ring with Zoom for Nikon Z7, Z6 Isotta Extension Ring with Zoom for Nikon Z7, Z6

    Isotta Extension Ring with Zoom for Nikon Z7, Z6, Z7ii, Z6ii

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: ISO-2343

    Isotta Extension Ring with Zoom for Nikon Z7, Z6 Housing   The Isotta Extension Ring with Zoom for Nikon Z7, Z6 has 120mm bayonet and is designed to be used with the Isotta Nikon Z7 Housing. It allows you to be able to utilize the zoom capability of...

    $386.40
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  • Isotta 70mm Extension Ring B120

    Isotta 70mm Extension Ring B120

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: ISO-224

    Isotta 70mm Extension Ring B120 for Isotta Housings   The Isotta 70mm Extension Ring B120 has 102mm bayonet and is designed to be used with Isotta housings. It is built from black anodized material which is durable yet lightweight. It provides an...

    $229.00
    Add to Cart
  • Isotta 20mm Extension Ring B120

    Isotta 20mm Extension Ring B120

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: ISO-179

    Isotta 20mm Extension Ring B120 for Isotta Housings   The Isotta 20mm Extension Ring B120 has 102mm bayonet and is designed to be used with Isotta housings. It is built from black anodized material which is durable yet lightweight. It provides an...

    $169.00
    Add to Cart
  • Ikelite DL Port Extension 2in

    Ikelite DL Port Extension 2in

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: IKE-5516.69

    Ikelite DL Port Extension 2.0in Part #: Ike-5516.69 This Ikelite Port Extension extends the port by 2.0in and designed to be used with the new dry lock port system.   Please see Ikelite DryLock Port Chart We dive with our products all the time. Please...

    $220.00
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  • Ikelite DL Port Extension 1.6in

    Ikelite DL Port Extension 1.6in

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: IKE-5516.67

    Ikelite DL Port Extension 1.6in Part #: Ike-5516.67 This Ikelite Port Extension extends the port by 1.6in and designed to be used with the new dry lock port system.   Please see Ikelite DryLock Port Chart We dive with our products all the time. Please...

    $200.00
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  • Nauticam 90mm Extension Ring Nau-21190

    Nauticam 90mm Extension Ring Nau-21190

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-21190

    Nauticam 90mm Extension Ring DISCONTINUED   Product Overview: This is the Nauticam 90mm extension ring.   * For instructions on installation please click here Please see Nauticam Port Chart We dive with our products all the time. Please...

    $582.00
  • Nauticam E16 Pancake Port with 67mm Thread

    Nauticam E16 Pancake Port with 67mm Thread

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-36126

    Nauticam E16 Pancake Port With 67mm Thread * This item is non-returnable, non-refundable, non-cancellable, and may be subject to extended lead times as it is manufactured on demand. We always do our best to meet trip deadlines so please advise us if you...

    $394.00
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  • Nauticam N85 to N120 Port Adapter 60mm for Sony E-Mount

    Nauticam N85 to N120 Port Adapter 60mm for Sony E-Mount

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-36204

    Nauticam N85 to N120 60mm Port Adapter For Sony E-Mount Part #: Nau-36204 Product Overview: Nauticam N85 to N120 Port Adapter has been designed to convert from an N85 port opening to N120 port opening to use with N85 Sony housings with Metabones EF...

    $518.00
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  • Nauticam N100 Extension Ring 30

    Nauticam N100 Extension Ring 30

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-37401

    Nauticam N100 Extension Ring 30 Part #: Nau-37401 Product Overview: Nauticam Extension Ring 30 is designed to be used with N100 port system and has an effective length of 30mm Please see Nauticam Port Chart We dive with our products all the time...

    $351.00
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  • Nauticam N100 Extension Ring 40

    Nauticam N100 Extension Ring 40

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-37402

    Nauticam N100 Extension Ring 40 Part #: Nau-37402 Product Overview: Nauticam Extension Ring 40 is designed to be used with N100 port system and has an effective length of 40mm Please see Nauticam Port Chart We dive with our products all the time...

    $351.00
    Add to Cart
  • Nauticam N100 Extension Ring 50

    Nauticam N100 Extension Ring 50

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-37403

    Nauticam N100 Extension Ring 50 Part #: Nau-37403 Product Overview: Nauticam Extension Ring 50 is designed to be used with N100 port system and has an effective length of 50mm Please see Nauticam Port Chart We dive with our products all the time...

    $388.00
    Add to Cart
  • Nauticam N85 to N120 55mm Port Adapter with Lens Control Knob

    Nauticam N85 to N120 55mm Port Adapter with Lens Control Knob

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-36401

    Nauticam N85 to N120 55mm Port Adapter with Lens Control Knob Part #: Nau-36401 Product Overview: The Nauticam port adapter converts your N85 port opening to accomodate N120 ports.  It also has an integrated lens control knob Please see Nauticam...

    $685.00
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  • Nauticam N200 Extension Ring 30

    Nauticam N200 Extension Ring 30

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-16402

    Nauticam N200 Extension Ring 30 Part #: NAU-16402 Product Overview: Nauticam N200 Extension Ring 30 is designed to provide a 30mm effective length to an N200 Port setup.    Please see Nauticam Port Chart We dive with our products all the time. Please...

    $949.00
    Add to Cart
  • Nauticam N200 Extension Ring 40

    Nauticam N200 Extension Ring 40

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-16403

    Nauticam N200 Extension Ring 40 Part #: NAU-16403 Product Overview: Nauticam N200 Extension Ring 40 is designed to provide a 40mm effective length to an N200 Port setup.    Please see Nauticam Port Chart We dive with our products all the time. Please...

    $1,089.00
    Add to Cart
  • Nauticam N200 Extension Ring 50

    Nauticam N200 Extension Ring 50

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: NAU-16404

    Nauticam N200 Extension Ring 50 Part #: NAU-16404 Product Overview: Nauticam N200 Extension Ring 50 is designed to provide a 50mm effective length to an N200 Port setup.    Please see Nauticam Port Chart We dive with our products all the time. Please...

    $1,221.00
    Add to Cart
  • Olympus PER-E01 Port Extension Ring

    Olympus PER-E01 Port Extension Ring

    Free Shipping on Orders Over $200 to the US and Canada

    SKU: OLY-PER-E01

    Olympus PER-E01 Port Extension Ring for Olympus OM-D Housing   Product Overview: The Olympus PER-E01 Port Extension Ring is designed to be used with Olympus EC-14 1.4x teleconverter for underwater use and is compatible with Olympus OM-D underwater...

    $179.99
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72 of 131 Items

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