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I was hoping you'd come in and comment Paul, As I was saying earlier in this thread, I remember suffering many frustrating nights with my C11 wondering why I couldn't get a sharp planetary image.. You pointed out the heater I was using, and upon removal of that, everything became very very clear.. I don't like heaters much anymore.. on refractors they are a necessity.. at longer focal lengths (>800~900mm) they do start to distort the images...
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