Lens cover
Also known as: replaceable lens cover, protective lens
The flat glass or plastic window that protects an action camera lens. Many models let you unscrew and replace it when it gets scratched or cracked.
Updated
What it means
Action cameras put a protective window in front of the actual lens elements. It seals the camera against water and dust and takes the hits from gravel, branches and crashes. On many GoPro and similar models this cover twists off, so a scratched one can be swapped in a minute instead of sending the whole camera for repair.
The same mount is used for accessories: some cameras accept ND filters, protective covers or lens mods such as the Max Lens Mod in place of the standard window. That makes the cover both a shield and an interface.
How it works in practice
Keep a clean microfiber cloth in your pocket and wipe the cover before every session. Fingerprints, sunscreen and salt spray produce soft, hazy footage and glowing halos around lights, and they are invisible on a small camera screen. A quick check of the flare around the sun in a test shot tells you if the glass is dirty.
For water sports, a hydrophobic coating or a little saliva on the cover helps water drops slide off instead of sticking. When you remove the cover, make sure the seal is clean and the cover is fully tightened, otherwise water can reach the lens and fog the inside.
What to watch out for
A scratch in the middle of the cover shows up as a soft or glowing spot in every frame, especially when shooting toward the sun. Replace it rather than hoping the edit hides it. Genuine replacements are cheap compared to losing a trip of footage, and a separate lens protector can take the first hit.
Cheap third-party covers sometimes use lower-quality glass that adds flare, softness or color tint. If your footage suddenly looks hazy after swapping a cover, try the original. Also avoid putting sticky films directly on the glass, as they trap dust and bubbles that show up in bright scenes, and condensation behind a loose cover leads to fog.
How RawClip handles it
RawClip cannot remove smudges, scratches or water spots from footage. A clean lens cover gives the AI clearer clips to choose from, and your highlight looks sharper from the first shot to the last.