XIV

A dew shield is: a device used——to prevent moisture/condensation buildup on the: lens of a camera or telescope collector during night observations. The dew shield either shades the——lens. Or provides a small amount of warm air directly in front of the lens or collector——to prevent dew from collecting on the "element." Some dew shields work by, "using heating element that keeps the objective lens warm enough to keep the dew from collecting."

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