On a cold, humid evening, the slanted window of your Telrad is often the first to get covered, because it is open towards the sky. A Telrad dew cap screens the window, so it cools down less quickly and the dew stays on longer. Also, streetlamp or neighbor light is less visible.<\/p>\n\n\n\n
The cap is made for the Telrad viewfinder and covers over the viewfinder window. You can find more ways to prevent fog from forming at Dew prevention for your telescope<\/a>.<\/p>\n\n\n\n A dew cap prevents fogging, but does not always completely prevent it. Therefore, set it on at the beginning of the evening, because a window that has already fogged up will not clear up immediately. Let the cap dry after use before storing it.<\/p>\n\n\n\n On very wet nights you can use it the dew heating for the Telrad<\/a> in applications controlled by a regulator for fog lights<\/a>.<\/p>","protected":false},"excerpt":{"rendered":" Cap over the slanted window of the Telrad, which blocks out dew and stray light from lanterns so that you can see the rings more clearly.<\/p>","protected":false},"featured_media":113779,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[635],"product_cat":[3144,56,3093,501],"product_tag":[],"class_list":["post-113780","product","type-product","status-publish","has-post-thumbnail","product_brand-telrad","product_cat-dauw-preventie","product_cat-telescoop-accessoires","product_cat-zoeker-accessoires","product_cat-red-dot-finders-en-reflex-sights","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"instock","bundle_stock_quantity":null,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":113782,"url":"https:\/\/www.telescoop.nl\/en\/telrad-dauwkap-plus-houdt-het-kijkvenster-langer-dauwvrij\/","url_meta":{"origin":113780,"position":0},"title":"Telrad dew cap plus keeps the viewing window free of dew for longer","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Larger dew cap for the Telrad, which keeps the slanted window clear longer during a long, humid night.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/18998_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/18998_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/18998_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113758,"url":"https:\/\/www.telescoop.nl\/en\/dauwkap-voor-telrad-kijkvenster-tg-ds-telegizmos\/","url_meta":{"origin":113780,"position":1},"title":"Rain cover for Telrad TV window TG-DS | Telegizmos","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Small cap from Telegizmos around the viewing window of your Telrad, so that the glass doesn't fog up as quickly on a wet night.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/21328_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/21328_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/21328_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":112820,"url":"https:\/\/www.telescoop.nl\/en\/dauwverwarming-voor-de-telrad-zoeker-astrozap\/","url_meta":{"origin":113780,"position":2},"title":"Rain heating for the Telrad seeker | Astrozap","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Heating for the glass window of the Telrad viewfinder. This keeps the red rings and the stars behind it visible, even on wet nights.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/15140_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/15140_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/15140_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113760,"url":"https:\/\/www.telescoop.nl\/en\/beschermhoes-tg-tr-voor-de-telrad-zoeker-telegizmos\/","url_meta":{"origin":113780,"position":3},"title":"Protective cover TG-TR for the Telrad viewfinder | Telegizmos","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Protective cover that covers the entire Telrad viewfinder, including the window and the rotary control, for when the viewfinder is mounted on an extended telescope.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/21329_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/21329_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/21329_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":32191,"url":"https:\/\/www.telescoop.nl\/en\/bresser-mcx127-dauwkap\/","url_meta":{"origin":113780,"position":4},"title":"Bresser MCX127 Dew Hood","author":"","date":"02-11-2025","format":false,"excerpt":"Bresser dew shield for the MCX-127 GoTo telescope: slows down fogging of the correction plate, blocks stray light and protects the glass. 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