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Date: 27 Nov 2006 19:58:38
From:
Subject: Does a naked-eye gain of +1.5 magnitudes imply an equal telescopic gain?
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If I go somewhere darker than my light-polluted home and take my
telescope, and I can see 1.5 magnitudes fainter there with the naked
eye than at home, should I expect an equal improvement with the
telescope? Does it work that way?
Thanks for any useful replies.
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Date: 28 Nov 2006 04:37:40
From: Pierre Vandevennne
Subject: Re: Does a naked-eye gain of +1.5 magnitudes imply an equal telescopic gain?
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allisonki@IGNmail.com wrote in news:1164686318.395459.185140
@h54g2000cwb.googlegroups.com:
> If I go somewhere darker than my light-polluted home and take my
> telescope, and I can see 1.5 magnitudes fainter there with the naked
> eye than at home, should I expect an equal improvement with the
> telescope? Does it work that way?
In my experience, yes. And in practice, unless you are looking at stars
exclusively, the perceived improvement is bigger than that imho. Two
reasons that I can see
- under darker skies, the dark adaptation of your vision will be better
- on deep sky objects, you'll just see more stuff and you'll pay more
attention
At least, that's how it subjectively works for me.
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