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Steve,
Broadband filters are okay (well at least the Orion one I owned anyway) but they do very little in terms of improving the views of objects. They might for instance make the views more aestically pleasing by darkening the background and improving the contrast ever so slightly. I would rather go to a dark sky site and get the same effect (and the views will definatly be much better anyway) on objects like galaxies, globs, open clusters. They are next to useless at dark sky sites (broadbands) but the UHC filters do improve the views quite dramatically (even from dark sky sites) when used on the appropriate objects. In my opinion no filter can improve views of galaxies and clusters from the city, burbs....
Darren
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