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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!

24 of 139 Items
  • Ikelite DL Port Extension 42mm

    Ikelite DL Port Extension 42mm

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

    SKU: IKE-75042

    Ikelite DL Port Extension 42mm Part #: Ike-75042 This Ikelite Port Extension extends the port by 42mm 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...

    $250.00
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  • Ikelite Canon 8-15 mm f/4L EF USM Fisheye Dome Port Kit Option 2 Ikelite Canon 8-15 mm f/4L EF USM Fisheye Dome Port Kit Option 2 Ikelite Canon 8-15 mm f/4L EF USM Fisheye Dome Port Kit Option 2

    Ikelite Canon 8-15 mm f/4L EF USM Fisheye Dome Port Kit Option 2

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

    SKU: IKE-CANON815DOMEKIT2

    Ikelite Canon 8-15 mm f/4L EF USM Fisheye Dome Port Kit - Option 2   Compact and lightweight for travel. Dome shade must be removed. Some vignetting (shadows in the corners of the image) will be present. Zoom gear may alternatively be used to...

    $650.00
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  • Inon S-MRS Magnet Ring RF14-35

    Inon S-MRS Magnet Ring RF14-35

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

    SKU: INO-4570018120664

    Inon S-MRS Magnet Ring RF14-35   A magnet ring specifically designed for "Canon RF14-35mm F4L IS USM". In combination with compatible "MRS EXT. Ring 50", it supports zoom operation of the "RF14-35mm F4L IS USM". Not compatible with other MRS port...

    $220.00
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  • Inon S-MRS Magnet Ring C8-15 Set Inon S-MRS Magnet Ring C8-15 Set

    Inon S-MRS Magnet Ring C8-15 Set

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

    SKU: INO-4570018120510

    Inon S-MRS Magnet Ring C8-15 Set   A set of "S-MRS Magnet Ring" and "Magnet Ring Adapter C8-15". Attaching on the Canon "EF8-15mm F4L Fisheye USM" lens enables zoom operation. Only "MRS EXT. Ring 33" and "MRS EXT. Ring 111" are usable. Other MRS...

    $99.00
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  • Inon Extension Ring 36

    Inon Extension Ring 36

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

    SKU: INO-4562121435896

    Inon Extension Ring 36   An extension ring with 36mm effective length using M96 male/female threaded mounts. Required when using Canon "EF100mm f/2.8L Macro IS USM" + "Mount Adapter EF-EOS R" or "Sigma 70mm f/2.8 DG MACRO" + "Mount Adapter EF-EOS...

    $154.00
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  • Inon MRS Extension Ring 111 Inon MRS Extension Ring 111 Inon MRS Extension Ring 111

    Inon MRS Extension Ring 111

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

    SKU: INO-4570018120435

    Inon MRS Extension Ring 111   MRS EXT. Ring exclusively for "RF100mm f/2.8 L MACRO IS USM". Use with "M86 Port 07" attached on the front end. The new S-MRS provides smoother operation with less play or rattle comparing to the previous...

    $350.00
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  • Inon MRS Extension Ring 54

    Inon MRS Extension Ring 54

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

    SKU: INO-4570018120633

    Inon MRS Extension Ring 54   An Extension Ring for Canon "RF15-30mm F4.5-6.3 IS STM" employing the S-MRS system, where zooming operation is controlled by the magnetic attraction. Attaching "S-MRS Zoom Ring RF15-30" on the camera lens enables zooming...

    $275.00
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  • Inon MRS Extension Ring 50

    Inon MRS Extension Ring 50

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

    SKU: INO-4570018120626

    Inon MRS Extension Ring 50   An extension ring tailored for Canon RF14-35mm F4L IS USM to provide smoother operation with less play or rattle in combination with the S-MRS Magnet Ring RF14-35 on the lens. Housing side is same M96 threads on the...

    $638.00
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  • Inon S-MRS Magnet Ring

    Inon S-MRS Magnet Ring

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

    SKU: INO-4570018120503

    Inon S-MRS Magnet Ring   A magnet ring attached on the camera lens to control various lens rings by magnetic attraction with an S-MRS Control Ring on "MRS EXT. Ring 33" or "MRS EXT. Ring 111".The S-MRS Magnet Ring has been newly designed to optimize...

    $28.00
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  • Inon MRS Extension Ring 33 Inon MRS Extension Ring 33

    Inon MRS Extension Ring 33

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

    SKU: INO-4570018120428

    Inon MRS Extension Ring 33   The new S-MRS provides smoother operation with less play or rattle comparing to the previous model. By combining the EOS R6 Mark II with an RF lens, the MF Peaking function can also be used during full-time manual...

    $220.00
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  • Marelux Extension Ring 35 for MX-RX100M7 Housing

    Marelux Extension Ring 35 for MX-RX100M7 Housing

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

    SKU: MX-32401

    Marelux Extension Ring 35    The Marelux Extension Ring 35 for MX-RX100M7 Housing.       We offer lifetime support with all purchases.Please call or email us with any questions, our knowledgable staff would love to assist you...

    $120.00
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  • Marelux Extension Ring 15 with Lock

    Marelux Extension Ring 15 with Lock

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

    SKU: MX-32001

    Marelux Extension Ring 15 with Lock   Product Overview: The Marelux Extension Ring 15 with Lock extends your port system by 15mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 Body Material:...

    $236.00
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  • Marelux Extension Ring 40 with Focus Knob Sony FX3

    Marelux Extension Ring 40 with Focus Knob (Sony FX3)

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

    SKU: MX-32202

    Marelux Extension Ring 40 with Focus Knob For Sony FX3  Product Overview: The Marelux Extension Ring 40 with Lock extends your port system by 40mm and it features a know to manually adjust the focus. Specifications: Depth Rating: 150m Port...

    $536.00
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  • Marelux Extension Ring 40 with Focus Knob

    Marelux Extension Ring 40 with Focus Knob

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

    SKU: MX-32101

    Marelux Extension Ring 40 with Focus Knob Product Overview: The Marelux Extension Ring 40 with Lock extends your port system by 40mm and it features a know to manually adjust the focus. Specifications: Depth Rating: 150m Port Mount: Series 5...

    $446.00
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  • Marelux Extension Ring 100 with Lock

    Marelux Extension Ring 100 with Lock

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

    SKU: MX-32010

    Marelux Extension Ring 100 with Lock Product Overview: The Marelux Extension Ring 100 with Lock extends your port system by 100mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 ...

    $436.00
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  • Marelux Extension Ring 90 with Lock

    Marelux Extension Ring 90 with Lock

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

    SKU: MX-32009

    Marelux Extension Ring 90 with Lock Product Overview: The Marelux Extension Ring 90 with Lock extends your port system by 90mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 Body...

    $406.00
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  • Marelux Extension Ring 20 with Lock

    Marelux Extension Ring 20 with Lock

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

    SKU: MX-32002

    Marelux Extension Ring 20 with Lock Product Overview: The Marelux Extension Ring 20 with Lock extends your port system by 20mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 Weight...

    $246.00
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  • Marelux Extension Ring 30 with Lock

    Marelux Extension Ring 30 with Lock

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

    SKU: MX-32003

    Marelux Extension Ring 30 with Lock Product Overview: The Marelux Extension Ring 30 with Lock extends your port system by 30mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 Weight...

    $266.00
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  • Marelux Extension Ring 40 with Lock

    Marelux Extension Ring 40 with Lock

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

    SKU: MX-32004

    Marelux Extension Ring 40 with Lock Product Overview: The Marelux Extension Ring 40 with Lock extends your port system by 40mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 Weight...

    $286.00
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  • Marelux Extension Ring 50 with Lock

    Marelux Extension Ring 50 with Lock

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

    SKU: MX-32005

    Marelux Extension Ring 50 with Lock Product Overview: The Marelux Extension Ring 50 with Lock extends your port system by 50mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 Weight...

    $306.00
    Add to Cart
  • Marelux Extension Ring 60 with Lock

    Marelux Extension Ring 60 with Lock

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

    SKU: MX-32006

    Marelux Extension Ring 60 with Lock   Product Overview: The Marelux Extension Ring 60 with Lock extends your port system by 60mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 ...

    $326.00
    Add to Cart
  • Marelux Extension Ring 70 with Lock

    Marelux Extension Ring 70 with Lock

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

    SKU: MX-32007

    Marelux Extension Ring 70 with Lock   Product Overview: The Marelux Extension Ring 70 with Lock extends your port system by 70mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 ...

    $346.00
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  • Marelux Extension Ring 80 with Lock

    Marelux Extension Ring 80 with Lock

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

    SKU: MX-32008

    Marelux Extension Ring 80 with Lock   Product Overview: The Marelux Extension Ring 80 with Lock extends your port system by 80mm and it features a safety lock to avoid accidents Specifications: Depth Rating: 150m Port Mount: Series 5 ...

    $376.00
    Add to Cart
  • Inon Extension Ring 81

    Inon Extension Ring 81

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

    SKU: INO-4562121435919

    Inon Extension Ring 81   An extension ring is compatible with "Canon EXTENDER EF2x". Required when using Canon "EF100mm f/2.8L Macro IS USM", Kenko x 2.0 Teleconversion Lens, and LEICA DG MACRO-ELMARIT 45mm/F2.8 ASPH./MEGA O.I.S. in combination with...

    $165.00
    Add to Cart
24 of 139 Items

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