Diffusers & filters

Frequently asked questions about underwater diffusers and filters

What does a diffuser do on an underwater strobe or video light?

A diffuser softens and widens the light beam from an underwater strobe or video light. This helps create smoother lighting with reduced hotspots and more even coverage.

Why are ambient filters used underwater?

Ambient filters help balance artificial and natural light underwater. They are commonly used to create more natural colour reproduction and smoother transitions between strobe light and ambient light.

Do diffusers reduce light output?

Most diffusers slightly reduce light output because the beam is spread across a wider area. The amount of reduction depends on the diffuser material and thickness.

What is the difference between a diffuser and a colour filter?

Diffusers soften and spread the light beam, while colour filters adjust colour temperature or help correct colour balance underwater.

Why are IR filters used with underwater strobes?

IR filters block visible light from the trigger strobe while still transmitting the trigger signal to remote strobes. This helps prevent unwanted light from appearing in the final image.

Why are diffusers useful for wide-angle underwater photography?

Wide-angle underwater photography often benefits from diffusers because they provide broader and more even light coverage across larger scenes.