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Product Information
The Sea & Sea Fiber-Optic Cable II L/2 Connectors is a 725 mm (28.5 inch) optical sync cord that carries the flash start and stop signal from a camera or housing to a Sea & Sea strobe. It is Sea & Sea product number 50133, the long (L) member of the Fiber-Optic Cable II family, and it is built from a 613 core methacrylic resin fiber bundle so attenuation of light stays minimal even when the cable is bent.
Who it is for
This cable is for underwater photographers who trigger a Sea & Sea strobe optically rather than electrically, and who need more reach than the shorter versions of the same cable give. At 725 mm it suits longer arm and tray setups, strobes positioned well out from the housing, or routing that has to loop around a housing, port or handle. Because the multi-core bundle is more resistant to distortion, bending and physical impact than single fiber cable, it is a sensible choice for travel and repeated rigging and de-rigging.
Key details
- Sea & Sea product number 50133, SKU SS-50133
- Total length 725 mm / 28.5 inches, with L/2 connectors
- 613 fiber cores in the bundle for minimal signal loss
- Fiber diameter 1.5 mm / 0.059 inch, cable (sheath) diameter 2.7 mm / 0.105 inch
- Construction: plastic methacrylic resin (polymethyl methacrylate)
Compatibility and sizing
Sea & Sea specifies the Fiber-Optic Cable II for use with Sea & Sea strobes, and notes that using other manufacturers' fiber cables has led to reported issues. The same cable is published in three lengths: S/2 connector (50135) at 310 mm, M/2 connector (50128) at 453 mm and this L/2 connector (50133) at 725 mm. Per the manufacturer's FAQ, the L-type cable is not used with the Sea & Sea optical converter; converter setups call for the standard Fiber-Optic Cable II.
DiveCatalog.com is an authorized Sea & Sea dealer and a dive shop in Irvine, California since 2003. Call 888-701-4017 or start a chat if you want help confirming the right cable length or connector type for your housing and strobe.
- 613 fiber cores in a single multi-core bundle rather than one solid fiber.
- Minimal light attenuation even when the cable is bent, so the flash signal reaches the strobe without loss.
- Transmits flash start and stop signal optically from the camera or housing to the strobe.
- More durable than single fiber cable, with greater resistance to distortion, bending and physical impact.
- Long (L) version with a total length of 725 mm / 28.5 inches for extended arm and strobe positioning.
- L/2 connector ends as supplied by Sea & Sea, product number 50133.
- Methacrylic resin construction (polymethyl methacrylate plastic fiber).
- 1.5 mm fiber diameter inside a 2.7 mm outer cable diameter.
- Three published lengths in the Fiber-Optic Cable II family: 310 mm (S/2, 50135), 453 mm (M/2, 50128) and 725 mm (L/2, 50133).
- Specified for Sea & Sea strobes, which the manufacturer recommends over third-party fiber cables.
| Brand | Sea & Sea |
| Model | Fiber-Optic Cable II L/2 Connectors |
| Product number | 50133 |
| SKU | SS-50133 |
| Barcode | 702730810606 |
| Type | Optical sync cable, strobe accessory |
| Construction | Plastic, methacrylic resin (polymethyl methacrylate) |
| Fiber cores | 613 |
| Fiber diameter | 1.5 mm / 0.059 inch |
| Cable diameter | 2.7 mm / 0.105 inch |
| Total length | 725 mm / 28.5 inches |
| Connectors | L/2 connector type |
| Other lengths available | S/2 connector 310 mm (50135), M/2 connector 453 mm (50128) |
| Recommended use | Sea & Sea strobes |
⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
How long is the L/2 Fiber-Optic Cable II, and how do the S and M versions compare?
The L/2 connector version, product number 50133, has a total length of 725 mm, which is 28.5 inches. Sea & Sea publishes the same cable in two shorter lengths: the S/2 connector (50135) at 310 mm and the M/2 connector (50128) at 453 mm. Choose the L length when your strobe sits far from the housing or the cable has to route around arms, ports or handles.
Why does a 613 core fiber bundle matter?
The Fiber-Optic Cable II uses a bundle of 613 fiber cores inside one strand instead of a single solid fiber. That construction keeps attenuation of light minimal even when the cable is bent, so the flash start and stop signal reaches the strobe without loss. It also makes the cable more resistant to distortion, bending and physical impact than single fiber cable types.
Can I use this cable with the Sea & Sea optical converter?
No. Per Sea & Sea's FAQ, the L-type cable is not used with the optical converter; those configurations call for the standard Fiber-Optic Cable II instead. If you are building a converter-based setup, contact DiveCatalog at 888-701-4017 before ordering so we can confirm which cable and connector type your housing and strobe combination needs.
Will it work with strobes from other brands?
Sea & Sea specifies the Fiber-Optic Cable II for use with Sea & Sea strobes, and notes that other manufacturers' fiber cables have caused reported issues. The cable terminates in Sea & Sea L/2 connectors, so fit depends on your strobe's optical port. Reach out with your exact housing and strobe models and we will confirm compatibility before you buy.
