Dome Clamps

Dome clamps are designed to secure lenses to the Domes 120mm and/or 180mm. Each dome is different, so clamps designed for one dome size 120mm do are not compatible with the dome 180mm.

Outex makes various clamp sizes for both domes, to support any/all lenses that do not have filter threads on them, such as wide angle, fixed-hood, or fisheye lenses. They are engineered that way to match ensure the domes are positioned perfectly in relation to the specific lens for optimal imaging performance and results. It does that in multiple ways:

• This design optimizes the optical positioning of the Outex dome port in relation to the lens, so there’s no vignetting, reflections, refraction, or other interference common with many underwater housings where the port is independent of the lens and designed to match it.
• It becomes one with the lens in use, just like a filter, or polarizer would. It moves with the lens, so it remains in that best optical position at all focal lengths, or as the lens moves.

Like your camera & lens system, the Outex housing system is modular and made up of interchangeable, compatible parts. All/any of our ports, including the domes, are interchangeable and fit all/any of our covers and vice versa.

Dome clamps are also useful if/when you want to use polarizers or filters inside Outex. So instead of using a dome adapator inside the dome, you can use the lens’ filter threads for the polarizer or filter, and use the dome clamp to secure it instead.

Built for Every Lens. Built to Last.

Outex dome clamps are machined from metal — not plastic. Metal ensures consistent grip, precise tolerances, and reliable performance across thousands of uses, in saltwater, cold, heat, and pressure. Where plastic deforms over time, metal holds.

Adjustable travel for a perfect fit on any lens barrel.

Each clamp features approximately 1–2mm of adjustable travel. This engineered tolerance allows a single clamp to conform precisely to a range of lens barrel diameters — gripping cleanly without play or wobble, and locking the dome into the correct optical position every time.

Compatible with every lens — past, present, and future.

Outex manufactures clamps in all sizes, matched to the full range of lenses currently on the market — and we continue to expand the line as new lenses are released. This means your dome is never obsolete:

• The dome you buy today works with every lens you currently own.
• It will work with every lens you buy in the future.
• When a new lens comes out, the clamp — the inexpensive part — is all you ever need to add.

The dome is the significant optical investment. The clamp is the affordable, lens-specific component that varies by lens — not only ensuring compatibility, but also optimizing the dome’s position for the best possible optical results with that specific lens.

One dome. Every lens. Forever.

Not Sure Which Clamp Size You Need?

No problem. Use the Order Comments field in your cart to tell us your lens model (e.g. Sigma 14-24mm f/2.8 E-Mount) or your clamp size if you know it, and we’ll confirm the right clamp for your lens after purchase.

Alternatively, select “I don’t know. Please contact me after purchase.” from the variant options above and we’ll reach out to get you the correct size.