Grant quote
There were some PN I failed to see even with the filter: NGC 6802, NGC 6879, IC 5148, IC 4406 and IC 4997. I will have to try them again some time. If anyone has luck with them with a small to medium scope: let me know please (8" or 10" - I don't need to know if a 16" can find them).
Well I wont tell you then
But still observe them anyway.
Cheers