Dew & Cooling Solutions
You've planned the perfect night out under the starry skies. Your equipment is ready. The night is still and steady. You're enjoying the celestial views through your telescope when you notice something. You turn on your red flashlight to check the charts - sure that you've discovered a new reflection nebula - and then you notice the dew that's collected on your equipment.
No matter where you live on Earth, a certain percentage of water vapor exists in the air. When air begins to cool, it loses its capacity to hold moisture and condensation begins to form. In a high humidity situation, the dew point is reached at a higher temperature and condensation on optics will stop an observing night or a photography session dead in its tracks. Nothing is immune and moisture on eyepieces, finderscopes, corrector plates, and even primary mirrors not only stops you from viewing, but can collect unnecessary dirt on delicate coated surfaces. In this category, you'll find dew heater straps for telescopes, dew heater system accessories, telescope dew system controllers, telescope temperature and humidity sensors, and dew shields and caps.
Another phenomonon that can keep you from your best views begins in your garage, closet, or other storage area. When your telescope is not being used, it is normally stored in a location that is warmer than the outside nighttime temperature. Once outdoors, it takes time for your scope to acclimate, and if you try to observe before that happens, you will be gazing through tube currents that will degrade your view. This is where telescope coolers can help. If you find yourself dealing with extreme temperature changes, coolers can help the "acclimation" process along, especially for closed tubed designs like Schmidt-Cassegrains.