Baader UHC filter and small scopes

Mostly, the urban legend about small scopes not getting on well with nebula filters is just wrong.

A narrowband nebula filter (ie: the UHC) will cut down on light, and a line filter (ie: an OIII or Hbeta) will *really* cut down on light, and as such may make some targets invisible in small scopes. But you probably wouldn't have seen much of them without the filter either.

And counter examples abound: under dark skies you can make out the California nebula, the North America nebula and the Rosette by looking through a filter naked-eye. (And that's what, a 6 or 7mm scope?)

Cheers,
-- Jeff.

I've both 2" and 1.25" UHC filters.
They really do remove most of what you'll see, apart from the nebulosity, and the stars will all be deep blue.
If you want emission nebulas they work well...best on things like the Veil, Rosette and some planetarys.
M42 is the best though, with the various densities and ripples of nebulosity clear, and extending much further than you'd think they do.
Expensive, though.