SCOPE DOCTOR
Nov 18, 2021
1 minute
With Steve Richards
![f021-04](https://article-imgs.scribdassets.com/lxzk4no8w98j470/images/fileJ1Y9QHR1.jpg)
![f021-03](https://article-imgs.scribdassets.com/lxzk4no8w98j470/images/fileYO6WRKGA.jpg)
Email your queries to scopedoctor@skyatnightmagazine.com
I have a Sky-Watcher 200P Dobsonian telescope that appears to have mildew or mould on the primary mirror. Is this a big problem and should
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