Nikon cameras are useless in drawers for a month or two in humid weather, and the photos taken recently will turn purple. What happened?

-Don't you know that cameras are afraid of humidity? Purple? That should be the lens problem! Mold growing in humid environment is the biggest enemy of camera equipment. This is because the lens surface of the lens is coated with a thin film, which provides rich nutrition for the growth and reproduction of mold. Mold decomposes the film components on the lens surface, producing punctate or filamentous mildew spots, which affect the transparency and imaging of the lens and even lead to the scrapping of the lens in serious cases, so mold is the biggest killer of camera photographic equipment.