Sony FDR-AX43 Help Manual page 272

Help Guide
Digital 4K Video Camera Recorder
FDR-AX43/AX45/AX60
About care and storage of the lens
Wipe the surface of the lens clean with a soft cloth in the following instances:
When there are fingerprints on the lens surface
In hot or humid locations
When the lens is exposed to salty air such as at the seaside
Store in a well-ventilated location subject to little dirt or dust.
To prevent mold, periodically clean and store the lens as described above.
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