For a modern digital Canon setup, a UV filter usually isn’t needed for UV control. Lens glass already blocks some UV, and the camera’s sensor assembly typically includes UV filtering, so UV-related image problems are generally already handled.

That means if your goal is front-element protection rather than UV reduction, a clear protective filter makes more sense than choosing a UV filter specifically for image quality reasons.

For physical protection, the lens hood is often the better first line of defense. It helps prevent bumps, keeps the front element farther from contact, and also helps with flare. A filter can protect against scratches or grime, but it won’t absorb impact as well as a hood and can itself break.

One caveat: some Canon lenses are more fully weather-sealed when a front filter is fitted, so if sealing matters, check the lens documentation.

In short: on a digital Canon L lens, UV filtering is usually unnecessary; choose a clear protector only if you want a protective filter, and use the hood either way.