Thanks Rick - the evil dew shield is just a small foam mat I rolled up and gaffer taped together at astrofest, after discovering dew on the objective on the first night just using the WO shield. I stuck it on this afternoon to replicate, as closely as possible in daylight, the original conditions.
I might give it another go without foam mat tomorrow then, although I'd prefer to focus on something astro proper at night instead of a distant cloud
Btw, in the above image I noticed fuzzy rings appearing around the bright stars too. I don't see the effect in the first try, despite all the extra curve stretching involved
