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Advice on filters to enhance visual observing, please.
I need some advice on a filter (or filters) to assist with visual observing of DSO's.
I see that the blurb for the Astronomik CLS filter...
"...gains contrast for most objects under light-polluted suburban skies. The Astronomik CLS blocks the emission of Hg and Na streetlights as well as all Skyglow-lines . All major emission lines from deep-sky objects are passed without surpression".
And the Astronomik UHC filter...
"... is the best filter for visual Deep Sky observation of nebulae. Almost 100% of the radiation from both O-III lines and the H-Beta line is transmitted. A second bandpass for the H-Alpha line ensures that this radiation reaches the observer's eye. Scattered light from other, unwanted wavelengths is filtered out. The sky background is darkened allowing much more detail in gas nebulas and planetary nebulas to be seen. This filter may be used successfully in telescopes 125mm and above (The UHC-E is a better choice in telescopes of smaller diameter)".
blah, blah, blah... Reading between the sales pitch, both appear to be handy.
I do not need them for imaging, just to enhance visual observing only, particularly in partial-suburban skies.
Are either one or both of these type of filters worthwhile? What do other members use? Your opinions greatly appreciated.
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