Quote:
Originally Posted by Paddy
I do have a fan and thanks to the set up of the rocker box, the airflow is directed across the face of the mirror, so it works as a boundary layer scrubber and cools the front of the primary fairly quickly. I also use mainly 175 - 250X but can go to 500X with a barlow, which I've been able to do on rare occasions.
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Thats good. I've only now realised the importance of fans. There's 3 on my scope, and the mirror cools 15C in an hour or less. Without fans, i'd never reach eqilibrium, and with the old scope that was always noticable.