Quote:
Originally Posted by mental4astro
Interesting points Stefan.
Had you insulated your Mak?
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I ended up cutting two large holes into opposite sides of the CF tube for ventilation. That helped but as soon as the front would reach thermal equilibrium, it would start fogging up.
Another experiment I did, was to store the scope in a cold place during the day and then take it outside to look at Jupiter exactly when the ambient temperature crossed over the scope's storage temp. The view, needles to say, was excellent but lasted less than 10 minutes.