Dome produced from Planext ®　
PLANEXTⓇ is amorphous bioplastic which helps realize carbon neutrality.
In cooperation with TEIJIN LIMITED*, SEA&SEA has succeeded in producing dome ports made from PLANEXT® which provides properties ideally suited for underwater photography.
*PLANEXT Ⓡ is a Teijin Limited registered trade name.

Optical Performance
Compared with conventional acrylic material or optical glass, PLANEXⓇ produces superior or better optical performance.
(See chart)
With high-precision injection molding methods, SEA&SEA has succeeded in producing a dome that has the same curvature as a concave meniscus lens*. The 210 AR dome’s optical distortion is as small as that of optical glass lenses. When used with an internal correction lens, the best image quality required for high-end cameras can be obtained. The dome is treated with a multi AR coating to prevent internal reflection from occurring (see comparison below).

* Lens having convex curvature on one side and concave curvature on the other side.

Comparison of lens reflection 1
Comparison of lens reflection 2

Strength Performance
Because of PLANEXT’s exceptional cohesive strength (Charpy impact strength) and due to a newly designed base, the dome ports’ depth rating is now 100m/330ft.

Compatibility
Compatible with all the wide-angle conversion lenses on the system charts posted on SEA&SEA’s website.
The UDP 120 AR is designed with a housing bayonet mount that is easily replaceable. An additional bayonet compatible with a current popular housing manufacturer is also included for user versatility.

Dome Replacement
The UDP 210 AR has been designed with usability in mind. The dome can be quickly and easily replaced by the user in any environment, therefore even if due to an unfortunate incident domes can be replaced on the spot.

Specifications
[Dimensions (DIAxD)] 250x104mm/10.0x4.2inches
[Weight] Approx. 1,310g/46.2oz
[Depth rating] 100m/328ft
[Construction] Corrosion-resistant aluminum alloy (with anodization and anti-reflective coating)
-Dome: Special optical resin
-Shades: ABS resin

The set consists of: Fisheye Dome Port 240 for EF 11-24mm F4L USM, Conversion Ring 25 for EF 11-24mm F4L USM, NX Dome Port Cover, Zoom Gear for EF 11- 24mm F4L USM and Rear Port Cover (L). 

Specifications
Fisheye Dome Port 240 for EF 11-24mm F4L USM
Spare O-ring(#62134)
[Dimensions (DIAxD)] 250 x 104 mm / 9.8 x 4.1 inches
[Weight] Approx. 1,225g / 43.2oz
[Depth rating] 80m / 260ft
[Construction] corrosion-resistant aluminum alloy (anodized), acrylic (dome) and ABS (shade)

Conversion Ring 25 for EF 11-24mm F4L USM
Spare O-ring (#62101)
[Dimensions (DIAxD)] 133 x 40.5mm / 5.2 x 1.6 inches
[Weight] Approx. 215g / 7.6 oz
[Depth rating] 100m / 330ft
[Construction] Corrosion-resistant aluminum alloy (alumite coating)
[Distance] Between the mount and the front end: 25mm / 1 inches (with port lock)

Notice
* Extension Ring 40L is also required in order to use the port and zoom gear set.
* The port and lens set is only compatible with housings equipped with a lens release button on the front case. When a lens is mounted on a camera in a housing without a lens lease button, the lens cannot be removed.
* Auto focus only (manual focus not possible).

This AR multi-coated glass dome port is ideal for wide-angle photography with a digital SLR camera. It comes with a port case and a dome port cover.

- Greatly reduces peripheral aberration (distortion) so images are clear from corner to corner.
- Efficient light transmission sharpens images.
- Made of glass so it sheds water droplets, excellent for clear over/under shots (half above water, half below).

Specifications
[Dimensions (DIAxD)] 181x78mm / 7.2x3.1inch
[Weight] Approx. 950g / 33.2oz
[Depth rating] 60m / 200ft
[Construction] Corrosion-resistant aluminum alloy
(anodized, anti-reflection coating on the inner surface)
- Dome: Optical glass BK7 (AR multi-coated)
- Shade: ABS resin
*Consult a SEA&SEA authorized service for more compatibility information.

Acrylic dome port for mirrorless interchangeable camera housings.

Specifications
[Dimensions (DIAxD)] 154 x 72 mm / 6.1 x 2.8 inches
[Weight] Approx. 280g / 9.9oz
[Depth rating] 80m / 260ft
[Construction] corrosion-resistant aluminum alloy (anodized), acrylic (dome) and ABS (shade)

This high quality dome port is very versatile and suitable for various wide-angle full frame lenses.
* Image aberration is rarely apparent.

Specifications
[Dimensions (DIAxD)] 250x104mm/10.0x4.2inches
[Weight] Approx. 1,270g/44.5oz
[Depth rating] 80m/262ft
[Construction] Corrosion-resistant aluminum alloy (with anodization and anti-reflective coating)
-Dome: Acrylic
-Shades: ABS resin

Specifications
[Dimensions (DIAxD)] 242x104mm / 9.7x4.2inch
[Weight] Approx. 1,000g / 35oz
[Depth rating] 60m / 200ft
[Construction] Corrosion-resistant aluminum alloy (alumite coating, antireflection coating)
- Dome: Acrylic
- Shade: ABS resin

Specifications
[Dimensions (DIAxD)] 102.5x68mm / 4.1x2.7inch
[Weight] Approx. 259g / 9.1oz
[Depth rating] 100m / 330ft
[Construction] Corrosion-resistant aluminum alloy (alumite coating) + Tempered glass
[Distance] Between the mount and the inner glass surface: 38.5mm / 1.5 inches

Specifications
[Dimensions (DIAxD)] 102x15mm / 4.1x0.6inch
[Weight] Approx. 90g / 3.2oz [Depth rating] 100m / 330ft
[Construction] Corrosion-resistant aluminum alloy (anodized)
[Distance] Between the mount and the front end: 11.2mm / 0.4 inch