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Date: 12 Sep 2007 05:24:08
From: Davoud
Subject: First Light
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Some of us here are actually /trying/ to do amateur astronomy -- of all
things!
There is a first-light image from my Tak Epsilon Astrograph at
<http://www.davidillig.com/ast-takfirstlight.shtml > and an /unofficial/
first light image at
<http://www.davidillig.com/ast-takfirstlight-un.shtml >.
Regards,
Davoud
--
usenet *at* davidillig dawt com
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Date: 13 Sep 2007 06:04:08
From: Terry B
Subject: Re: First Light
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"Davoud" <star@sky.net > wrote in message
news:120920070123520918%star@sky.net...
> Some of us here are actually /trying/ to do amateur astronomy -- of all
> things!
>
> There is a first-light image from my Tak Epsilon Astrograph at
> <http://www.davidillig.com/ast-takfirstlight.shtml> and an /unofficial/
> first light image at
> <http://www.davidillig.com/ast-takfirstlight-un.shtml>.
>
> Regards,
>
> Davoud
>
> --
> usenet *at* davidillig dawt com
Davoid
How do you find the questar as a guide scope. I assume it has quite a slow f
ratio. Do you have any problems finding guide stars?
Terry B
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Date: 13 Sep 2007 08:23:47
From: Davoud
Subject: Re: First Light
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Terry B:
> How do you find the questar as a guide scope. I assume it has quite a slow f
> ratio. Do you have any problems finding guide stars?
No. It works fine down to at least mag 12. That's a /lot/ of stars.
It's usually preferable not to use a star brighter than mag 8 or 9.
Davoud
--
usenet *at* davidillig dawt com
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Date: 12 Sep 2007 23:47:08
From: FOX oPINION
Subject: Re: First Light
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collimation required -
Davoud wrote:
> Some of us here are actually /trying/ to do amateur astronomy -- of all
> things!
>
> There is a first-light image from my Tak Epsilon Astrograph at
> <http://www.davidillig.com/ast-takfirstlight.shtml> and an /unofficial/
> first light image at
> <http://www.davidillig.com/ast-takfirstlight-un.shtml>.
>
> Regards,
>
> Davoud
>
> --
> usenet *at* davidillig dawt com
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Date: 12 Sep 2007 07:44:37
From: Dave Jessie
Subject: Re: First Light
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Davoud wrote:
> Some of us here are actually /trying/ to do amateur astronomy -- of all
> things!
>
> There is a first-light image from my Tak Epsilon Astrograph at
> <http://www.davidillig.com/ast-takfirstlight.shtml> and an /unofficial/
> first light image at
> <http://www.davidillig.com/ast-takfirstlight-un.shtml>.
Hi Davoud,
What's that pelican doing looking at the Gulf of Mexico?? ;^)
Beautiful image, first light or not. Looks like you have a winning
combination there.
Looking forward to more of your images,
Dave Jessie
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Date: 12 Sep 2007 06:59:40
From: Margo Schulter
Subject: Re: First Light
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Davoud <star@sky.net > wrote:
> Some of us here are actually /trying/ to do amateur astronomy -- of all
> things!
>
> There is a first-light image from my Tak Epsilon Astrograph at
> <http://www.davidillig.com/ast-takfirstlight.shtml> and an /unofficial/
> first light image at
> <http://www.davidillig.com/ast-takfirstlight-un.shtml>.
>
> Regards,
>
> Davoud
>
Congratulations, Davoud! Thanks for sharing these and other images
at your site. I especiallly like the Alnitak image. It seems that
the technique of combining grayscale images to arrive at a color
image is a bit like what are called color separations in digital
imaging and publishing.
By the way, the medieval Islamic contributions to astronomy and
the other sciences which you mention are indeed impressive.
Abd-Al-Rahman al-Sufi's description of the Great Nebula in
Andromeda (M31) around 964 from Isfahan in Persia is one of
my favorite examples: he calls it a "little cloud," which is,
of course, also the root concept for the Latin _nebula_.
His catalogue illustrates how Arabic was an international
language used in Persia also, for example, for scientific
communications, just as Latin was in Western Europe by speakers
of Germanic as well as Romance languages.
Again, thanks for your beautiful images, and also the happy
choice of the Double Cluster, a DSO indeed recorded in the
Greek literature.
Most appreciatively,
Margo Schulter
mschulter@calweb.com
Lat. 38.566 Long. -121.430
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