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Telescopes are designed for use during the night time hours. One caveat to nocturnal usage lies in the susceptibility of a telescope to moisture. Frost or dew can easily develop on a telescope whenever the temperature cools or in damp climates. One solution to protecting your telescope is employing the use of a lens shade/dew cap. The lens shade/dew cap is a simple cylindrical device which attaches to the end of your telescope to shield it from moisture. Dew caps come in plastic or metal formats to fit a variety of circumference dimensions.
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