This Astrozap dew shield/lens shade is made of lightweight, flexible, and durable black ABS plastic, lined with black felt to absorb both moisture and light. Aside from retarding the formation of dew when imaging, it acts as a lens shade to block neighboring lights and provide a sharper and higher contrast image when imaging from a light-polluted city or suburban site.
Simply wrap the Astrozap dew shield around the 12” Astro-Tech AT12RC optical tube’s front cell. The ends of the dew shield overlap and Velcro strips on the overlapping ends hold it firmly closed in a tubular shape. The Velcro closures are sewn in place for durability. A two-inch rubber trim inside the dew shield clasps the telescope optical tube front cell snugly to prevent any slippage of the dew shield during use.
Storage is easy. You can roll the Astrozap up like a newspaper and fasten it with a rubber band or string to stand out of the way in the back of a closet when not in use. Alternatively, you can store it open and flat in the top of your telescope carrying case or standing on end out of the way in the back of a closet.
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