RE: [APML] Light pollution filters and Comet NEAT

["Jeff Ball" <jeffball@astro-photography.com>]

Steve,
To my eye that looks like the filter is cutting off the peak of the
comet spectra around 540-560 and another cutoff around 580-600.  I guess
below 540 you would record the comet well and above 600 it would be
spotty.  I hope you get a chance to try it filtered and unfiltered and
share your results.  Good luck.

Best regards,
Jeff Ball
www.astro-photography.com
 

-----Original Message-----
From: astro-photo-bounces@seds.org [mailto:astro-photo-bounces@seds.org]
On Behalf Of steve banbury
Sent: Tuesday, May 18, 2004 5:14 PM
To: Discussion of Film Astrophotography
Subject: Re: [APML] Light pollution filters and Comet NEAT

Hi Greg and Jeff:

The IDAS filter response is shown at:
http://www.sciencecenter.net/hutech/tokai/filtplt.htm

The only spectra I could find on the web for  C/2001 Q4 was at:
http://home.freeuk.com/m.gavin/encke.htm

I didn't try to to superimpose the 2 plots, but  I can see that some 
energy would be lost using the filter. It still seems like a coin flip 
as to whether the reduction of local light pollution would make this
loss acceptable.  I'm suprised someone hasn't already been down this 
path before.

cheers--steve
Greg Hartke wrote:
 

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