Sea & Sea 30125 40L Extension Ring for Compatible Lenses in Underwater Housing Ports

Sea & Sea 30125 40L Extension Ring for Compatible Lenses in Underwater Housing Ports | SS-30125

It always seems that just as you get the framing right for that wide-angle reef shot, you’re already too close to fit the whole scene in the frame. That’s where the 40L extension ring from Sea & Sea solves a very specific need. Instead of struggling with an awkwardly placed subject, you simply extend the distance between your lens and the port, letting light in properly and keeping the focus exactly where you want it. This isn’t a vague accessory; it’s a precise spacer engineered to maintain the all-important optical quality of your underwater imaging system.

The 40mm length hits a sweet spot for a range of compatible port systems and lenses, giving you noticeable flexibility without throwing your buoyancy or housing balance too far off. You’ll notice the ring’s fluid integration keeps your housing rig securely connected, so there’s zero worry about leaks or stability shifts on a deep dive. Use it to dial in the exact subject-to-port distance, from macro compilations to mid-range reef cameras. This extension ring just removes a lot of hassle from the equation, and that’s exactly what you need when you’re already watching your air and battling currents.