{"product_id":"manguito-calefactado-grande-de-para-espejo-secundario","title":"Large heated dew shield for secondary mirror","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eHeated secondary mirror dew shield: for a consistently clear view of the sky\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eNo matter how clear the sky, sometimes the view is blurry. This is due to excessive humidity in the air. In such cases, telescope optics often fog up faster than we would like. As soon as a thin layer of dew settles on the secondary mirror, the night's observation is over. But Omegon's heated dew shield will keep humidity at bay. The resistance ensures consistently clear optics. Enjoy clear observation nights from now on, regardless of dew.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOverview of advantages:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYour secondary mirror will never fog up again\u003c\/li\u003e\n\u003cli\u003eEasy to fit: flexible shield for a perfect fit\u003c\/li\u003e\n\u003cli\u003eSelf-adhesive closure: sticks anywhere on the top of the shield.\u003c\/li\u003e\n\u003cli\u003eCinch\/RCA connector with 2-meter cable\u003c\/li\u003e\n\u003cli\u003eHeated dew shield available in two different sizes (12 or 14 cm) for small and large secondary mirrors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eKeep the optical tube free of dew\u003c\/b\u003e\u003cbr\u003eThe cable with RCA connector must be plugged into a suitable power source. 12V DC power is distributed evenly along the entire shield with only 0.2 W\/cm. This means that your shield maintains a temperature a few degrees above the ambient temperature, thus eliminating the risk of fogging. In addition, it does not consume too much power, making it battery-friendly.\u003c\/p\u003e\n\u003cp\u003eThe heated dew shield can be connected to a pulse controller to save energy. Tip: as an accessory, we recommend the Omegon dew heater controller. It allows you to connect up to 2 heated dew shields simultaneously and adjust their performance individually.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhy does the optical tube fog up?\u003c\/b\u003e\u003cbr\u003eThe effects of fog on the optical tube are well known to glasses wearers. It is generated from cold in a warm space. A layer of fog suddenly forms from fine water droplets on glasses as warm air condenses on cold glass surfaces. The same thing happens on the lenses of your telescope's optical tube. When the optical tube cools down, condensed water settles on the surface. But that's a thing of the past!\u003c\/p\u003e\n\u003cp\u003eWith heated dew shields, you can enjoy longer and more fruitful observation sessions. While your fellow astronomers have to pack up and go home, you can continue observing for as long as you want.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Omegon","offers":[{"title":"Default Title","offer_id":53581618708823,"sku":"56530","price":79.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/6198\/6860\/files\/56530_1.jpg?v=1779016727","url":"https:\/\/astrotelescopios.com\/en-uk\/products\/manguito-calefactado-grande-de-para-espejo-secundario","provider":"Astro Telescopios","version":"1.0","type":"link"}