Quote:
Originally Posted by tornado33
Great work there. Nice neutral coloured sky backgrounds.
Id use the dew heaters. Thermal movements worry high magnification planetary imagers rather then deep sky at prime focus, and a dewed mirror is worse. I take it your secondary is the one that gets fogged. The tip is to have just enough heat to keep the dew off
Scott
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I'd agree with Scott.
With the return to more "normal" weather, dew is again going to strike the astro-imager
. Use a heater to just keep the offending mirror above ambient. This may need some investigation to get right.