My general experience with low—surface brightness objects like this is that they are more sensitive to sky quality than to aperture. I would not be surprised if someone reports seeing it in a high-quality 6" under excellent conditions :-).
Hello all,
so far I have not been successful with this PN through my 6" F/5 achro, but I don't easily give up.
Clear skies,
Jiri
Clear skies, JG
Main field of interest: Large galactic diffuse nebulae