之前Leica有發e-mail給用戶有關於保護CMOS的訣竅,可以參考一下: How to protect your sensor • Before mounting a lens, carefully clean all parts of the lens that come into contact with the camera. • Always put the rear lens cap back on the lens after use. • Clean the body cap before use. • Always store all caps in a clean and dust-free place when not in use. Tip: Connect the rear lens cap that is currently not in use to the camera body cap. • When changing lenses, always hold the camera with the bayonet pointing downwards. • Avoid changing lenses in dusty environments. If this should not be possible, change the lens inside a large and clean plastic bag. • Always change the lens as quickly as possible. • Make sure that no wind blows into the open camera. Always hold your camera with your back to the wind.