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Dew prevention
Hi,
I need some advice regarding mirror dew prevention. I live in Brisbane (subtropical climate). I am building a 10" f/5 truss tube dob.
1. I have an 80mm dia 12VDC fan to install in the mirror box. Should it go behind the mirror (between the collimation bolts) blowing toward the back of the mirror or on one side of the box blowing across the face of the mirror?
2. Should I be looking at spiders with dew heater options for the secondary mirror?
Appreciate any advice from practical experience.
Regards,
Andrew.
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