Lens caps can be used to cover the front element/glass of your lens when walking around in harsh conditions.

Protect your lens against dust and scratches caused by accidental impacts, scratches, greasy fingerprints and water.

Rear lens caps prevents dirt and dust from entering your camera lens. It wil also protect the rear opening when your lens is in storage.

Rear lens caps protects your lens contacts from dirt and grime. This prevents your contacts from wearing out.

This universal lens cap fits older lenses. It serves the exact same purpose of regular lens caps.

Protect your camera mirror, focus screen/viewfinder screen against dust when your camera lens is not attached to the camera body.

Prevent water or dust particles from entering your camera when your lens is not attached to the camera body.