Archive | May, 2013

12V LED Dimmer

A Cheap Multi-Channel Dew Heater Controller

Following on from my post about DIY Nichrome Dew Heater Bands, I’m going to show you how to build a cheap and effective dew heater controller. Whilst preventing dew formation is essential to avoid interruptions to the night’s imaging, we do not want to generate excessive heat as this can cause air currents in front […]

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DIY dew heater bands (wrapped around the dew shields)

Making Your Own Nichrome Dew Heater Bands

In my previous post about dew formation and prevention, I explained why dew forms on your imaging gear and outlined some simple strategies for combating it. Perhaps the most effective of these is to use a Dew Heater Band to keep your telescope optics just above the dew point. There are many commercial suppliers of dew heater bands, but they […]

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Foam Camping Mat

Dew Formation and Prevention

Unless you are fortunate enough to do your imaging in a very dry environment, you will be all too familiar with the problem of dew forming on your telescope objective, corrector plate or camera lens. As an astro-imager who spends all his time ten metres above sea-level and within sight of the North Sea, dew […]

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