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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!

96 of 140 Items
  • Nauticam N120 Extension Ring 90 II Nauticam N120 Extension Ring 90 II

    Nauticam N120 Extension Ring 90 II

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

    SKU: NAU-22190

    Nauticam N120 Extension Ring 90 II     Product Overview: The Nauticam N120 Extension Ring 90 II has been designed to extend the port by 90mm (effective length)   Please see Nauticam Port Chart   We offer lifetime support with all...

    $545.00
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  • Nauticam N120 Extension Ring 80 II Nauticam N120 Extension Ring 80 II

    Nauticam N120 Extension Ring 80 II

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

    SKU: NAU-22180

    Nauticam N120 Extension Ring 80 II   Product Overview: The Nauticam N120 Extension Ring 80 II has been designed to extend the port by 80mm (effective length) and popularly used with these lenses. Nikon 14-24mm Nikon 16-35mm Canon 16-35mm  ...

    $510.00
    Add to Cart
  • Nauticam N120 70mm Extension Ring II

    Nauticam N120 70mm Extension Ring II

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

    SKU: NAU-22170

    Nauticam N120 70mm Extension Ring II   Product Overview: The Nauticam N120 Extension Ring 70 II has been designed to extend the port by 70mm (effective length) and popularly used with these lenses. Sigma 17-70mm Nikon 12-24mm Nikon 14-24mm Nikon...

    $501.00
    Add to Cart
  • Nauticam N120 Extension Ring 60 II Nauticam N120 Extension Ring 60 II

    Nauticam N120 Extension Ring 60 II

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

    SKU: NAU-22160

    Nauticam N120 Extension Ring 60 II   The Nauticam N120 Extension Ring 60 II is made from aluminum anodized alloy and has an effective length of 60mm with a N120 port system. Please see Nauticam Port Chart   We offer lifetime support with...

    $492.00
    Add to Cart
  • Nauticam N120 Extension Ring 55 II Nauticam N120 Extension Ring 55 II

    Nauticam N120 Extension Ring 55 II

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

    SKU: NAU-22155

    Nauticam N120 Extension Ring 55 II   Product Overview: The Nauticam N120 Extension Ring 55 II has been designed to extend the port by 55mm.     Please see Nauticam Port Chart   We offer lifetime support with all purchases.Please...

    $492.00
    Add to Cart
  • Nauticam N120 Extension Ring 50 II Nauticam N120 Extension Ring 50 II Nauticam N120 Extension Ring 50 II

    Nauticam N120 Extension Ring 50 II

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

    SKU: NAU-22150

    Nauticam N120 Extension Ring 50 II   Product Overview: The Nauticam N120 Extension Ring 50 II has been designed to extend the port by 50mm   Please see Nauticam Port Chart     We offer lifetime support with all purchases.Please call...

    $483.00
    Add to Cart
  • Nauticam N120 Extension Ring 40 II Nauticam N120 Extension Ring 40 II Nauticam N120 Extension Ring 40 II

    Nauticam N120 Extension Ring 40 II

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

    SKU: NAU-22140

    Nauticam N120 Extension Ring 40 II   Product Overview: The Nauticam N120 Extension Ring 40 II has been designed to extend the port by 40mm and is popularly used with the following lenses and Nauticam 8 inch Dome Port: Sigma 8-16mm Tokina 10-17mm...

    $483.00
    Add to Cart
  • Nauticam N120 Extension Ring 35 II Nauticam N120 Extension Ring 35 II Nauticam N120 Extension Ring 35 II

    Nauticam N120 Extension Ring 35 II

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

    SKU: NAU-22135

    Nauticam N120 Extension Ring 35 II   Product Overview: Nauticam N120 Extension Ring 35 with Lock is made from aluminum alloy and is designed to extend the port by 35mm.   Please see Nauticam Port Chart   We offer lifetime support with...

    $474.00
    Add to Cart
  • Nauticam N120 Extension Ring 30 II Nauticam N120 Extension Ring 30 II Nauticam N120 Extension Ring 30 II

    Nauticam N120 Extension Ring 30 II

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

    SKU: NAU-22130

    Nauticam N120 Extension Ring 30 II   Product Overview: The Nauticam N120 Extension Ring 30 II has been designed to extend the ports by 30mm.   Please see Nauticam Port Chart   We offer lifetime support with all purchases.Please call or...

    $466.00
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Add to Cart
  • 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
    Pre-Order Now
  • Sale
    Olympus PAD-EP08 Port Extension Adapter for Olympus OM-D Housing

    Olympus PAD-EP08 Port Extension Adapter for Olympus OM-D Housing

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

    SKU: OLY-PAD-EP08

    Olympus PAD-EP08 Port Adapter for Olympus OM-D Housing   Product Overview: The Olympus PAD-EP08 Port Adapter attaches to Port Extension Ring PER-E01 for Lens Port PPO-E01, PPO-E04 or PPO-E03 when any of these ports is attached to the Olympus OM-D...

    $149.95
    $149.99
    Pre-Order Now
  • Fantasea FNX Converter 55G

    Fantasea FNX Converter 55G

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

    SKU: FA-2131

    Fantasea FML Port Extension 25 :Part #" FA-2121 Product Overview: Fantasea FNX Converter 55G allows installing FNX or other third party lens ports and port accessories to your Fantasea FML system. Construction: Hard anodized Aluminum alloy  ...

    $499.95
    Add to Cart
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    Aquatica Step Up Extension Ring for Mirrorless Lenses

    Aquatica Step Up Extension Ring for Mirrorless Lenses

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

    SKU: AQ-30616

    Aquatica Step Up Extension Ring for Mirrorless Lenses Part #: AQ-30616 Product Overiew: Aquatica Extension Ring designed to be used with the various mirrorless lenses such as Olympus 7-14mm Pro Lens, Panasonic 8-18mm Lens and Sony 12mm E-Mount Lens ...

    $195.50
    $230.00
    Add to Cart
  • Zen Underwater Port Body for Ikelite DSLR Housings

    Zen Underwater Port Body for Ikelite DSLR Housings

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

    SKU: ZEN-IKPB.24

    Zen Underwater Port Body for Ikelite DSLR Housings Product Overview: Zen Port Body for Ikelite DSLR Housings is made from anodized aluminum material which also provides a large inside diameter to cater for wide-body lenses.  It allows you to use...

    $230.00
    Add to Cart
  • Nauticam N120 Extension Ring 25 with Lock

    Nauticam N120 Extension Ring 25 with Lock

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

    SKU: NAU-21125

    Nauticam N120 Extension Ring 25 with Lock DISCONTINUED This Extension Ring has been replaced by Nauticam N120 Extension Ring 25 II Product Overview: Nauticam N120 Extension Ring 25 with Lock is made from aluminum alloy and is designed to be used with...

    $413.00
  • Nauticam N120 Extension Ring 35 with Lock

    Nauticam N120 Extension Ring 35 with Lock (Type 1)

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

    SKU: NAU-21135

    Nauticam N120 Extension Ring 35 with Lock (Type I)   Product Overview: Nauticam N120 Extension Ring 35 with Lock is made from aluminum alloy and is designed to be used with DSLR housings.   Please see Nauticam Port Chart We dive with our...

    $439.00
    Add to Cart
  • Fantasea FML Port Extension 25

    Fantasea FML Port Extension 25

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

    SKU: FA-2121

    Fantasea FML Port Extension 25 :Part #" FA-2121 Product Overview: Fantasea FML Port Extension 25 extends the port by 25mm.   Construction: Hard anodized Aluminum alloy Depth rated to 60 meters / 200 feet Effective length: 25mm ...

    $249.95
    Add to Cart
  • Ikelite DL Port Extension 50mm

    Ikelite DL Port Extension 50mm

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

    SKU: IKE-75050

    Ikelite DL Port Extension 50mm Part #: Ike-75050 This Ikelite Port Extension extends the port by 50mm 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 call...

    $275.00
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  • Ikelite DL Port Extension 28mm

    Ikelite DL Port Extension 28mm

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

    SKU: IKE-75028

    Ikelite DL Port Extension 28mm Part #: Ike-75028 This Ikelite Port Extension extends the port by 28mm 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 call...

    $225.00
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  • Ikelite DL Port Extension 20mm

    Ikelite DL Port Extension 20mm

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

    SKU: IKE-75020

    Ikelite DL Port Extension 20mm Part #: Ike-75020 Product Overview: This Ikelite Port Extension extends the port by 20mm and designed to be used with the new dry lock port system.   Please see Ikelite DryLock Port Chart We dive with our products all...

    $225.00
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  • Sea and Sea ML-NX Conversion Ring 30

    Sea & Sea ML-NX Conversion Ring 30

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

    SKU: SS-30126

    Sea & Sea ML-NX Conversion Ring 30 Part #: SS-30126 Product Overview: Sea & Sea's ML-NX Conversion Ring, when used, allows for the use of NX ports and extension rings on mirrorless housings. Dimensions (DIAxD) 133 x 41.2mm / 5.2 x 1.6...

    $419.95
    Add to Cart
  • Sale
    Aquatica Extension Ring 96.5 mm #48466

    Aquatica Extension Ring 96.5 mm #48466

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

    SKU: AQ-48466

    Aquatica Extension Ring 96.5 mm Part #: AQ-48466 Product Overview: For use with Aquatica ports in order you utilize your favorite lens.     Please click here for Aquatica Port Chart. Please call the Bluewater Photo team at 310-633-5052 with any...

    $364.65
    $429.00
    Add to Cart
  • Sale
    Aquatica Extension Ring 97.5 mm #48454

    Aquatica Extension Ring 97.5 mm #48454

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

    SKU: AQ-48454

    Aquatica Extension Ring 97.5 mm Part #: AQ-48454 Product Overview: For use with Aquatica ports in order you utilize your favorite lens.     Please click here for Aquatica Port Chart. Please call the Bluewater Photo team at 310-633-5052 with any...

    $313.65
    $369.00
    Add to Cart
  • Sale
    Aquatica Extension Ring 74.5 mm #48459

    Aquatica Extension Ring 74.5 mm #48459

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

    SKU: AQ-48459

    Aquatica Extension Ring 74.5 mm Part #: AQ-48459 Product Overview: For use with Aquatica ports in order you utilize your favorite lens.     Please click here for Aquatica Port Chart. Please call the Bluewater Photo team at 310-633-5052 with any...

    $279.65
    $329.00
    Add to Cart
  • AOI Extension Ring 22mm for Olympus OMD Housings - EXT-22

    AOI Extension Ring 22mm for Olympus OMD Housings - EXT-22

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

    SKU: AOI-EXT-22

    AOI Extension Ring 22mm for Olympus OMD Housings - EXT-22 Currently Unavailable We recommend the Zen Port Adapter for Olympus OM-D housing as a great alternative! Part #: AOI-EXT-22 Product Overview: The AOI port system for the Olympus OMD...

    $165.00
96 of 140 Items

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