Hi Tony,
Good you should say that. It was only with an OIII filter that I was able to seen the dark pillars in Eta Carina from home in my C8. You do need to be patient though, as they are faint, and require averted vision to make them out. Mixing up the eyepieces being used will give different results with the filters too, and you'll find the best EP/filter/scope combination for any given object.
Sure, not as good a view as from a dark site, but if home is where you get to do most of your observing, I'd take what I can get, knowing, understanding and accepting the limitations.
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