Initially, I used just the dew heater not the dew shield.
I found that attaching the dew shield made it a bit inconvenient to reach in and adjust the collimation knobs. So I removed it.
I will try with dew shield alone one of these days...when I fine tune the collimation further. Weather has taken a turn for worse in Sydney.
Quote:
Originally Posted by Kuz
Are you using a dew shield or just a dew heater . I seen on you tube (can't remember the site now) where a guy done a test with a dew shield only and a dew shield plus heater strip and just a heater strip. The best result was just a dew shield to stop the dew forming . He also used a heat measuring gun which showed the outside of the front glass was about 3 degrees hotter than centre. I have just purchased a mak 180 just for planetary images, (yet to ve used) and decided to just go with a dew shield .
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