null

FREE Shipping on Dive Gear $50+ or Any Order $200+!

30 day return policy

We will match and beat any price!

(310) 633-5052

Extension Rings

144 of 148 Items
  • 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...

    $499.95
    Add to Cart
  • 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...

    $258.00
    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...

    $280.00
    Add to Cart
  • 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.  

    $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

    $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...

    $275.00
    Choose Options
  • 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...

    $225.00
    Choose Options
  • 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...

    $225.00
    Choose Options
  • 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. ...

    $419.95
    Add to Cart
  • 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.

    $481.00
    Add to Cart
  • 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.

    $414.00
    Add to Cart
  • 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.

    $369.00
    Add to Cart
  • Aquatica Extension Ring 21.5mm

    Aquatica Extension Ring 21.5mm

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

    SKU: AQ-48463

    Aquatica Extension Ring 21.5mm part# AQ-18463 Product Overiew: This extension ring is compatible with Aquatica DSLR underwater housing line.   Please click here for Aquatica Port Chart. Please...

    $302.00
    Add to Cart
  • Sea and Sea Extension Ring 46 with Focus Knob

    Sea & Sea Extension Ring 46 with Focus Knob

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

    SKU: SS-30117

    Sea & Sea Extension Ring 46 with Focus Knob :Part #" SS-30117 Product Overview: Extension ring 46 with focus knob allows you to manual focus with Sea&Sea MDX housings when also using the correct...

    $579.95
    Add to Cart
  • Sea and Sea Locking Extension Ring 40L

    Sea & Sea Locking Extension Ring 40L

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

    SKU: SS-30125

    Sea & Sea Locking Extension Ring 40L Product Overview: Sea & Sea's new Locking Extension Rings provide additional security to your underwater camera rig. Dimensions (DIAxD) 129 x 55.5mm / 5.1...

    $299.95
    Add to Cart
  • Sea and Sea Locking Extension Ring 30L

    Sea & Sea Locking Extension Ring 30L

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

    SKU: SS-30124

    Sea & Sea Locking Extension Ring 30L Product Overview: Sea & Sea's new Locking Extension Rings provide additional security to your underwater camera rig. Dimensions (DIAxD) 129 x 45.5mm / 5.1...

    $284.95
    Add to Cart
  • Sea and Sea Locking Extension Ring 20L

    Sea & Sea Locking Extension Ring 20L

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

    SKU: SS-30123

    Sea & Sea Locking Extension Ring 20L This Extension Ring will replaced by the new DX Extension Ring 20L   Product Overview: Sea & Sea's new Locking Extension Rings provide additional security to your...

    $279.95
    Add to Cart
  • Nauticam N85 Mini Extension Ring 17

    Nauticam N85 Mini Extension Ring 17

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

    SKU: NAU-36617

    Nauticam N85 Mini Extension Ring 17 Part #: Nau-36617 Product Overview: Mini Extension ring for Nauticam Mirrorless Housings.   

    $290.00
    Add to Cart
  • Nauticam N120 55mm Extension Ring Nau-21155

    Nauticam N120 55mm Extension Ring (Type 1)

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

    SKU: NAU-21155

    Nauticam N120 55mm Extension Ring (Type 1)   Product Overview: This is the Nauticam 55mm extension ring with lock for dSLR underwtaer housings & ports with N120 port mount If you have any questions...

    $457.00
    Add to Cart
  • Aquatica Extension Ring 39.5mm #18462

    Aquatica Extension Ring 39.5mm #18462

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

    SKU: AQ-48462

    Aquatica Extension Ring 39.5mm Part #: AQ-18462 Product Overview: For use with Aquatica ports in order you utilize your favorite lens.     Please click here for Aquatica Port

    $302.00
    Add to Cart
  • Ikelite DLM 2.2 Inch Port Extension Ikelite DLM 2.2 Inch Port Extension Ikelite DLM 2.2 Inch Port Extension

    Ikelite DLM 2.2 Inch Port Extension

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

    SKU: IKE-5516.70

    Ikelite DLM 2.2 Inch Port Extension   The Ikelite DLM 2.2 Inch Port Extension extends the port by 2.2 inches for longer lenses. Also compatible with Ikelite Canon SL1 Housing and Canon 100mm USM...

    $220.00
    Choose Options
  • Aquatica 32mm extension ring 30601

    Aquatica 32mm extension ring 30601

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

    SKU: AQ-30601

    Aquatica 32mm Extension Ring Part #: AQ-30601 Product Overview: For Panasonic 7-14mm F4 lens and Aquatica mirrorless underwater housings 32mm in length   Please click 

    $258.00
    Add to Cart
  • Aquatica 58mm Extension Ring for 9-18mm and 12-40mm

    Aquatica 58mm Extension Ring for 9-18mm and 12-40mm

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

    SKU: AQ-30602

    Aquatica 58mm Extension Ring for 9-18mm and 12-40mm part # AQ-30602 The 58mm Port Extension Ring for Select Olympus Micro Four Thirds Lenses from Aquatica, extends the length of the lens port,...

    $258.00
    Add to Cart
  • Nauticam Extension Ring 20mm with Lock

    Nauticam Extension Ring 20mm with Lock

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

    SKU: NAU-21120

    Nauticam 20mm Extension Ring with Lock (Type I)   Product Overview: Used with lenses like the Tokina 10-17mm fisheye lens, to place the dome in the proper position optically  

    $413.00
    Add to Cart
  • Sale
    XIT 404 XIT404 Aquatica Focus Knob

    XIT404 Aquatica Focus Knob

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

    SKU: XIT-KF0001AQ

    XIT404 Aquatica Focus Knob Part #: KF0001AQ Product Overview: An Aquatica Focus Knob gives you the perfect control you need when performing that critical focus. It also makes it easier to zoom...

    $31.50
    $45.00
    Add to Cart
  • XIT 404 XIT404 Ikelite Aperature Knob

    XIT404 Ikelite Aperature Knob

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

    SKU: XIT-KAIKK

    XIT404 Ikelite Aperature Knob Part #: KAIKK Product Overview: An Ikelite Aperture Knob gives you the perfect control you need it. The Aperture Knob presses onto your existing knob, vinyl tape is...

    $35.00
  • XIT 404 XIT404 Ikelite F-Stop knob

    XIT404 Ikelite F-Stop knob

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

    SKU: XIT-KFSIKK

    XIT404 Ikelite F-Stop knob Part# KFSIKK Product Overview: An Ikelite F-Stop Knob gives you the perfect control you need it. The F-Stop Knob presses onto your existing knob, vinyl tape is included...

    $35.00
  • Aquatica Extension Ring 63.5mm #48458

    Aquatica Extension Ring 63.5mm #48458

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

    SKU: AQ-48458

    Aquatica Extension Ring Part #48458 Product Overview: For use with Aquatica ports in order you utilize your favorite lens.  Constructed from anodized aluminum.      Please click here for Aqu

    $369.00
    Add to Cart
  • Aquatica Extension Ring 54.5mm with Lock

    Aquatica Extension Ring 54.5mm with Lock

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

    SKU: AQ-48457

    Aquatica Extension Ring 54.5mm with Lock Part #: AQ-48457 Product Overview: For use with Aquatica ports in order you utilize your favorite lens. This updated version includes a lock to prevent...

    $369.00
    Add to Cart
  • Aquatica Extension Ring 16.5mm #48456

    Aquatica Extension Ring 16.5mm #48456

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

    SKU: AQ-48456

    Aquatica Extension Ring 16.5mm Part #: AQ-48456 Product Overview: For use with Aquatica ports in order you utilize your favorite lens.       Please click here for Aquatica Port Chart.

    $302.00
    Add to Cart
  • Aquatica Extension Ring 28.5mm with Lock

    Aquatica Extension Ring 28.5mm with Lock

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

    SKU: AQ-48453

    Aquatica Extension Ring 28.5mm with Lock Part #: AQ-48453 Product Overview: For use with Aquatica ports in order you utilize your favorite lens. This updated version includes a lock to prevent...

    $302.00
    Add to Cart
  • Nauticam N85 Mini Extension Ring 30 Nau-36630

    Nauticam N85 Mini Extension Ring 30 (Nau-36630)

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

    SKU: NAU-36630

    Nauticam N85 Mini Extension Ring 30 Part #: Nau-36630 Product Overview: This extension ring allows you to use you Olympus Zuiko 60mm macro lens with your current Nauticam Macro Port

    $300.00
    Add to Cart
  • Nauticam Mini Extension Ring 20

    Nauticam Mini Extension Ring 20

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

    SKU: NAU-36620

    Nauticam Mini Extension Ring 20 Part #: Nau-36620 Product Overview: This extension ring allows you to use you Olympus Zuiko 60mm macro lens with your current Nauticam Macro Port 45.  

    $290.00
    Add to Cart
  • Ikelite Port Body 5510.16

    Ikelite Port Body 5510.16

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

    SKU: IKE-5510.16

    Ikelite Port Body Part #: Ike-5510.16 Product Overview: The Ikelite Port Body 5510.16 is the standard zoom port body and will accomodate lenses up to 3.4 inches long (with a flat port) or 3.5...

    $225.00
  • Nauticam N120 70mm Extension Ring Nau-21170

    Nauticam N120 70mm Extension Ring (Type 1)

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

    SKU: NAU-21170

    Nauticam N120 70mm Extension Ring (Type 1)   Part #: Nau-21170 Product Overview: This is the Nauticam 70mm extension ring for the N120 port system.   Used for these lenses (among others) Sigma...

    $474.00
    Add to Cart
  • Precision Sea and Sea to Ikelite Port Adapter

    Precision Sea & Sea to Ikelite Port Adapter

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

    SKU: PRE-SS-I-PA

    Precision Sea & Sea to Ikelite Port Adapter The Precision Sea & Sea Port Adapter allows you to mount your Ikelite style Precision dome to your Sea & Sea DSLR housing.   Have any questions?  Call us...

    $229.00
    Add to Cart
  • Precision Modular Port Body for Ikelite

    Precision Modular Port Body for Ikelite

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

    SKU: PRE-MPB-IKE

    Precision Modular Port Body for Ikelite Product Overview: The Modular Port Body which is designed to work with the Prec-5in-Nik-ike and Prec-5in-Tok-ike Precision 5" Dome as well as i

    $150.00
    Add to Cart
  • Nauticam N120 40mm Extension Ring with Lock

    Nauticam N120 40mm Extension Ring with Lock. (Type 1)

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

    SKU: NAU-21140

    Nauticam N120 40mm Extension Ring with Lock (type 1)   Product Overview: For use with the following lenses and the Nauticam 8 inch dome port: Sigma 8-16mm Tokina 10-17mm with 1.4x teleconverter...

    $439.00
    Add to Cart
  • Isotta Extension Ring 40 mm -B120

    Isotta Extension Ring 40 mm -B120

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

    SKU: ISO-200

    Isotta Extension Ring 40 mm -B120   The Isotta Extension Ring ISO-200 features a 120mm bayonet and extends the port by 40mm. The extension ring is built from black anodized anticorodal aluminum which...

    $202.40
    Add to Cart
  • Isotta Extension Ring 60 mm -B120

    Isotta Extension Ring 60 mm -B120

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

    SKU: ISO-218

    Isotta Extension Ring 60 mm -B120   The Isotta Extension Ring ISO-218 features a 120mm bayonet and extends the port by 60mm. The extension ring is built from black anodized anticorodal aluminum which...

    $227.70
    Add to Cart
  • Nauticam N120 10mm Extension Ring Nau-21110

    Nauticam N120 10mm Extension Ring (Nau-21110)

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

    SKU: NAU-21110

    Nauticam N120 10mm Extension Ring (Type I) * 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...

    $186.00
    Add to Cart
144 of 148 Items

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!

Win a free trip by joining our newsletter

Ask us anything!