Dustproof and waterproof lenses for camera

Dust-, moisture-proof

— the lens has enhanced protection against dust and moisture. The specific degree of such protection for different models can vary significantly, this point should be clarified according to the official documentation. However, anyway, "protected" lenses are more resistant to adverse conditions than ordinary ones, and it is precisely such optics that you should choose for regular shooting in adverse conditions (in particular, in bad weather).