The Marelux 210mm Optical Acrylic Fisheye Port is a large Series 5 dome port designed for ultra-wide and fisheye lenses on your Marelux housing. It pairs a 210 mm acrylic dome with a hard-anodized aluminum body to keep weight low while maintaining strength at depth.
This port is ideal for wide-angle reef scenes, big animals, and close-focus wide-angle work when matched to the correct extension rings and gears via the official Marelux port chart. Use it with a compatible Marelux underwater housing and Series 5 port system for a secure, integrated setup.
- What it is: 210 mm dome-shaped optical acrylic fisheye port (Item No. 31208) for Marelux Series 5 housings.
- Best for: Wide-angle and fisheye stills or video where you want maximum field of view with good corner performance.
- Not for: Macro or standard zoom lenses that are better served by flat or smaller dome ports.
- Key compatibility: Fits Marelux housings that use the Series 5 port mount.
Perfect for…
- Warm-water wide-angle reef scenes where you want edge-to-edge coverage.
- Big animal encounters such as sharks, rays, and dolphins at close range.
- Close-focus wide-angle with fisheye lenses when properly matched extensions are used.
- Video shooters who need a large dome for smooth motion and stable framing.
- Marelux Series 5 users building a flexible wide-angle kit around one main dome port.
Pros
- Large 210 mm dome supports immersive wide-angle and fisheye imaging.
- Lightweight underwater compared to similarly sized glass domes (−1000 g underwater).
- Rugged anodized aluminum body and POM shade for durability and impact protection.
- Series 5 mount integrates cleanly with current Marelux housings and extension rings.
- Supported by Bluewater Photo’s Marelux system expertise and lifetime advice.
Cons
- Larger dome size is bulkier for travel than small domes or flat ports.
- Requires correct extension rings and gears; not a “one-port-fits-all” solution.
- Acrylic dome is more prone to fine surface marks than glass and needs careful handling and cleaning.
Why Buy from Bluewater Photo?
Bluewater Photo was the first Marelux dealer in North America and has extensive hands-on experience with Marelux underwater housing systems, ports, and accessories.
- Authorized Marelux partner: Access to current port charts, system updates, and factory information.
- Lifetime support: Expert help with system design, port selection, and troubleshooting for the life of your gear.
- Returns & warranty: Standard Bluewater Photo return policies plus Marelux manufacturer warranty coverage (exact terms depend on region and purchase date).
- Real-world experience: Bluewater staff dive Marelux housings and ports regularly and can recommend practical configurations for your goals.
Give your Marelux underwater housing a true wide-angle workhorse with the 210 mm Optical Acrylic Fisheye Port.
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Specifications
- Build
- Material: Anodized aluminum alloy body; high quality optical acrylic dome; POM resin shade.
- Dimensions: 232 mm × 113 mm (manufacturer-listed; dome diameter × length).
- Weight (land): 1.3 kg.
- Weight (underwater): −1000 g (approx. −1.0 kg, slightly negative).
- Sealing & Depth
- Depth Rating: 100 m / 328 ft.
- Vacuum/Leak Alarm: Not built into the port; relies on the Marelux housing’s vacuum and leak detection system where fitted.
- Ports & Optics
- Port System: Marelux Series 5 port mount.
- Port Opening Diameter: 114 mm.
- Front Element: Dome-shaped optical acrylic, 210 mm diameter.
- Supported Optics: Designed for wide-angle and fisheye lenses; specific lens/extension pairings must be confirmed in Marelux and Bluewater port charts (please verify before purchase).
- Controls & Ergonomics
- Port-only component; no mechanical controls or buttons.
- Shade cannot be removed
- Compatibility
- Compatible Systems: Marelux housings that use the Series 5 port system (e.g. selected Canon, Sony, and Nikon 5" housings).
- Full Compatibility Charts:
- Marelux Port Charts Catalog on marelux.co (Canon, Sony, Nikon, Aquista).
- Bluewater Photo Marelux Canon Port Chart and related Marelux port chart resources.
- Please verify your specific camera body, lens, and extension ring combination with Bluewater Photo before purchase.
- 210mm Dome Port with Shade
- Rear Port Cap
Marelux 210mm Optical Acrylic Fisheye Port — FAQ
- Is the Marelux 210mm Optical Acrylic Fisheye Port compatible with my Marelux housing?
This port is compatible with Marelux housings that use the Series 5 port system. Please check the Marelux port charts (Canon/Sony/Nikon 5") or contact Bluewater Photo with your exact camera and housing model to confirm compatibility.
- Which lenses work with the 210mm Optical Acrylic Fisheye Port?
The port is intended for wide-angle and fisheye lenses, but exact lens and extension combinations vary by system. Please verify lens compatibility and required extensions using the Marelux and Bluewater Marelux port charts before purchase.
- Does the port include a shade and protective caps?
The 210 mm Optical Acrylic Fisheye Port is supplied with a shade and manufacturer warranty; some dealers also ship a rear port cap and case. Please verify what is included in the box with Bluewater Photo before purchase.
- What is the depth rating of the Marelux 210mm Optical Acrylic Fisheye Port?
The port is depth-rated to 100 m (328 ft), matching the rating of Marelux housings and making it suitable for both recreational and many technical dives.
- Does this port affect strobe or trigger compatibility?
No. Strobe sync, triggers, and TTL behavior are determined by your Marelux underwater housing and any installed flash trigger or bulkhead, not by the port itself. The port only changes your front optical interface.
- How should I clean and care for the acrylic dome?
Rinse thoroughly in fresh water after every dive, avoid wiping salt crystals when dry, and use only soft microfiber cloths or recommended acrylic-safe cleaners. If you are unsure which products are safe, please verify this specification with Bluewater Photo before purchase.
- Can I use wet wide-angle lenses with this dome?
This port is primarily designed for native wide-angle and fisheye lenses. Some wet optics may be compatible in specific configurations, but you should confirm details with Bluewater Photo and the appropriate Marelux port chart before planning a wet-lens setup.
- What support does Bluewater Photo provide if I buy this port?
Bluewater Photo offers lifetime system advice, port and lens matching help, and post-purchase support. They can assist you with choosing the right extensions, strobes, and accessories for your Marelux system.
