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Science Forum Index » Astro - Amateur Forum » Using a green filter to help combat light pollution
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| Starboard |
 Posted: Mon Feb 19, 2007 5:40 pm |
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Guest
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Last night as the frost was setting in, I was out taking advantage of
some really good weather. Although a little chilly, the transparency
was excellent (with the exception of some really high - badly thin and
fragmented - cirrus/stratus type clouds) and seeing was 8 out of 10.
No surface wind. And of course, no moon.
As I studied Saturn, I wondered if I might get a little extra contrast
using one of the color filters that I almost forgot I had (I hardly
use them at all). Although I do think that the filters improve
contrast of certain planetary features, e.g. color bands, I also think
that the *overall* view is best without any filtration. JMO.
But I swung the scope over at M42 (forgetting that the green filter
was still in), and found that there was a little contrast improvement.
Not as much as provided by the SkyGlow, but noticeable nonetheless.
The green filter seemed to help out with the light pollution.
Why it never dawned on me before - to try the green on the Orion
nebulae - beats me. Makes perfect sense when I think about it.
Anyway, thought I would throw it out there for anyone observing
through light polluted skies whom do not own a light pollution filter
to try.
Errol
pasnola.org |
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