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I live very close to Sydney CBD in the Balmain area. The thing is that I want a fiter that will improve contrast for more than just nebulae, but also galaxies and clusters. I've read on forums and websites how LPR filters such as Astronomik's CLS don't have a significant effect and are not worth the money because of their broad transmission of light. As a solution, UHC filters are reccomended as they are much more selective in their light restriction, and hence more contrast is gained. I am just sceptical as to whether they are so selective that these other DSO objects that I also want to view will be affected, or does this only apply in dark sky sights?
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