Re: [APML] Light pollution effect on film photography?

["Robert Gendler" <robgendler@worldnet.att.net>]

Hi Tim,
If you are already invested in CCD equipment then why not
stick to CCD. These days with a camera lens or small refractor
and a CCD camera you can get decent widefield images. The advantage
is that with the better sensitivity of CCD chips you can get above the
skyglow more efficiently. Digital processing techniques can then be
used to subtract skyglow. Its not that this couldn't be done with film
and special filters but CCD's work more efficiently in light polluted
conditions.
My location is no better than yours with mag 4.5 at best. You can succeed
in imaging DSO's with a CCD and some simple techniques.
Rob Gendler
Email: robgendler@att.net
Web site: http://www.robgendlerastropics.com/

----- Original Message -----
From: "Tim Kearsley" <tim@cirrus.demon.co.uk>
To: <astro-photo@seds.org>
Sent: Sunday, January 13, 2002 5:55 PM
Subject: [APML] Light pollution effect on film photography?


> Hi all,
>
> First of all, thanks to those who responded to my request a few days ago
> about the Sprintscan 4000 scanner.
>
> As a newcomer to film astrophotography, I would value the opinion of the
> experienced people on this list about how serious is the effect of light
> pollution on film photography.
>
> I live on the outskirts of a town, with other villages and towns around,
and
> my sky, certainly in three directions, has that awful orange glow of
sodium
> lamps seeping up from the horizon.  I would estimate that limiting visual
> magnitude at the zenith is around 4.0 - 4.5.  I suppose my question really
> is how damaging that degree of pollution is to photography with film.  I
> know that planetary and lunar photography is largely unaffected by such
> factors, but I use a CCD for such work anyway!  What I would love to take
is
> wide vistas of star fields and objects such as the North America nebula.
> Are such aims impossible from my type of location?
>
> Many thanks,
>
> Tim Kearsley
> Northamptonshire
> England
>
>
>
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