Suggestions Please - DSOs high in Ha and OIII and low in SII

[Gina]

I have just commissioned a twin imaging rig with 400mm f5 scopes so I'm looking for DSOs high in Ha and OIII but where the SII content isn't worth bothering with.  One of the scopes is only an achromat so I'm only interested in NB imaging to keep bandwidth down and stop CA.

I would be grateful for suggestions, please

[Gina]

Nobody?  Does that mean there aren't any?  Alright then I'll go full speed for a triple imaging rig   Funds don't permit buying a third Atik mono 460EX yet so I'll have to make do with a 314L+ and 300mm vintage SLR lens   A reasonable match to my 400mm FL scopes and 460EX cameras

[Phillyo]

I wouldn't even know where to begin Gina! Google!?

Phil

[MattJenko]

My understanding (without any actual narrowband experience) is that emission and planetary nebula as opposed to reflection nebula is what you are after.

[DaveS]

TBH I've not seen much [sII] in The Pacman, but that might just be me. I've just seen your double rig image in Deep Sky.

[Gina]

Thank you all - for your replies

Further examination of the 300mm lens shows it to be faulty so I've ordered an ST80.  If the Pacman does have any SII it's small enough to fit in the frame of the 314L+ on ST80.