is-it-normal-for-telescope-optics-to-freeze-up-when-the-temperature-is-below-freezing-with-high-humidity-if-so-how-can-i-prevent-thishttps://www.astronomy.com/observing/is-it-normal-for-telescope-optics-to-freeze-up-when-the-temperature-is-below-freezing-with-high-humidity-if-so-how-can-i-prevent-this/Is it normal for telescope optics to freeze up when the temperature is below freezing with high humidity? If so, how can I prevent this? | Astronomy.comcategories:Observing, Telescopes and Equipment | tags:Magazinehttps://www.astronomy.com/uploads/2021/09/thous_oaks_dew_cntrl_900.jpgInStockUSD1.001.00observingtelescopes-equipmentarticleASY2023-05-182010-02-2237399