Dew shield: Difference between revisions
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A '''dew shield''' is a device used to prevent moisture or [[condensation buildup]] on the [[Photographic lens|lens]] of a [[camera]] or [[telescope]] collector during cool 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 a heating element that keeps the objective lens warm enough to keep the dew from collecting. |
A '''dew shield''' is a device used to prevent moisture or [[condensation buildup]] on the [[Photographic lens|lens]] of a [[camera]] or [[telescope]] collector during cool 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 a heating element that keeps the objective lens warm enough to keep the dew from collecting. |
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Revision as of 07:54, 20 April 2007
A dew shield is a device used to prevent moisture or condensation buildup on the lens of a camera or telescope collector during cool 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 a heating element that keeps the objective lens warm enough to keep the dew from collecting.