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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!

  •  Inon S-MRS Zoom Ring RF15-30

    Inon S-MRS Zoom Ring RF15-30

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

    SKU: INO-4570018120688

    Inon S-MRS Zoom Ring RF15-30   Tailored magnet ring for Canon "RF15-30mm F4.5-6.3 IS STM". In combination with the compatible "MRS EXT. Ring 54", it enables zoom operation of the "RF15-30mm F4.5-6.3 IS STM".   Extension Specifications Weight...

    $220.00
  •  Inon S-MRS Magnet Ring S70 Set  Inon S-MRS Magnet Ring S70 Set

    Inon S-MRS Magnet Ring S70 Set

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

    SKU: INO-4570018120534

    Inon S-MRS Magnet Ring S70 Set   A set of "S-MRS Magnet Ring" and "Magnet Ring Adapter S70". Attaching on the Sigma "70mm F2.8 DG MACRO" lens enables manual focus operation. Only "MRS EXT. Ring 33" and "MRS EXT. Ring 111" are usable. Other MRS...

    $99.00
  •  Inon S-MRS Magnet Ring RF35 Set  Inon S-MRS Magnet Ring RF35 Set

    Inon S-MRS Magnet Ring RF35 Set

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

    SKU: INO-4570018120527

    Inon S-MRS Magnet Ring RF35 Set   A set of "S-MRS Magnet Ring" and "Magnet Ring Adapter RF35". Attaching on the Canon "RF35mm F1.8 MACRO IS STM" lens enables manual focus operation. Only "MRS EXT. Ring 33" and "MRS EXT. Ring 111" are usable. Other...

    $99.00
  •  Inon Extension Ring 18

    Inon Extension Ring 18

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

    SKU: INO-4562121435872

    Inon Extension Ring 18   An extension ring with effective length of 18mm using M96 male/female threaded mounts. For use with Canon "EF8-15mm F4L Fisheye USM" + "Mount Adapter EF-EOS R" in combination with "MRS EXT. Ring 33" and "M86 Dome Port 115"...

    $154.00
  •  Nauticam N120 to N100 Port Adaptor (29.3mm port adaptor)

    Nauticam N120 to N100 Port Adaptor (29.3mm port adaptor)

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

    SKU: NA-21329

    Nauticam N120 to N100 Port Adaptor (29.3mm port adaptor)   Product Overview: A step-down port adaptor to be able to mount N100 ports to the N120 Housings.   Please see Nauticam Port Chart    

    $325.00
  •  Isotta Extension Ring 30 mm

    Isotta Extension Ring 30 mm

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

    SKU: ISO-1380

    Isotta 30mm Extension Ring B102 for Isotta Housings Extension ring with 102 mm bayonet to increase the lenght of the housing's port by the mentioned measure and allow the use of different lenses.   Please see Isotta Port Chart We dive with our...

    $157.00
  • Sale
     Nauticam N85 to N120 34.7MM Port Adaptor - USED

    Nauticam N85 to N120 34.7MM Port Adaptor - USED

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

    SKU: NAU-36064-RNTL

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

    MSRP: $544.00
    Was: $544.00
    Now: $490.00
  •  Sea & Sea DX Extension Ring 40L

    Sea & Sea DX Extension Ring 40L

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

    SKU: SS-30145

    Sea & Sea DX Extension Ring 40L with Lock Product Overview: The Sea & Sea Extension Ring 40L with Lock extends your port system by 40mm and it features a safety lock to avoid accidental unscrewing of the port. Specifications: Depth Rating:...

    $299.95
  •  Sea & Sea DX Extension Ring 30L

    Sea & Sea DX Extension Ring 30L

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

    SKU: SS-30144

    Sea & Sea DX Extension Ring 30L with Lock Product Overview: The Sea & Sea Extension Ring 30L with Lock extends your port system by 30mm and it features a safety lock to avoid accidental unscrewing of the port. Specifications: Depth Rating:...

    $284.95
  •  Sea & Sea DX Extension Ring 20L

    Sea & Sea DX Extension Ring 20L

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

    SKU: SS-30143

    Sea & Sea DX Extension Ring 20L with Lock Product Overview: The Sea & Sea Extension Ring 20L with Lock extends your port system by 20mm and it features a safety lock to avoid accidental unscrewing of the port. Specifications: Depth Rating:...

    $279.95
  • Zen Port Adapter for Olympus OM-D housing

    Zen Port Adapter for Olympus OM-D housing

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

    SKU: ZEN-PA-EP08-EP

    Zen Adapter for Olympus OM-D Housing Product Overview: This adapter will allow the use of 3 popular Zen ports with the new style mount that Olympus has incorporated on Olympus brand OM-D housing, like the EP-08 (E-M5), PT-EP11 (E-M1) and...

    $199.99
  • Sale
    Nauticam USED:  Nauticam N120 80mm Extension Ring (Type 1)

    USED: Nauticam N120 80mm Extension Ring (Type 1)

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

    SKU: NAU-21180.0

    USED: Nauticam N120 Extension Ring 80 (Type 1)   CONDITION: LIKE NEW 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...

    MSRP: $510.00
    Was: $510.00
    Now: $437.00
  • Sale
    Nauticam USED: Nauticam N120 Bayonet Ring for Sea & Sea ports

    USED: Nauticam N120 Bayonet Ring for Sea & Sea ports

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

    SKU: SS-30203-USED-1

    USED: Nauticam N120 Bayonet Ring for Sea & Sea ports   Condition: Excellent Product Overview: This bayonet ring allows for the attachment of Sea & Sea ports to Nauticam housings - N120 port mounts.   We offer lifetime support with all...

    MSRP: $56.00
    Was: $56.00
    Now: $32.95
  • Sale
     Nauticam N85 to N120 55mm Port Adapter with Lens Control Knob - USED

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

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

    SKU: NAU-36401-RNTL

    Nauticam N85 to N120 55mm Port Adapter with Lens Control Knob *THIS IS A USED ITEM   Part #: Nau-36401 Product Overview: The Nauticam port adapter converts your N85 port opening to accommodate N120 ports.  It also has an integrated lens control...

    MSRP: $685.00
    Was: $685.00
    Now: $616.50
  •  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
  •  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...

    $510.00
  •  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
  •  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
  •  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
  •  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
  •  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
  •  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
  •  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
  •  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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