Re: [APML] NGC 6914 Tech Pan Tri-color and CCD comparison

["Volker Wendel" <volker@spiegelteam.de>]

Hi Mike,

I have two channels from a tricolor shot made with my astrocamera. Itīs blue
and red. I will scan it the next days and sent it to the list.

Volker
www.spiegelteam.de

----- Original Message -----
From: "Mike Cook, AF9Y" <mwcook@concentric.net>
To: <astro-photo@seds.org>
Sent: Wednesday, October 31, 2001 5:56 AM
Subject: [APML] NGC 6914 Tech Pan Tri-color and CCD comparison


> Chuck Vaughn and I have been comparing NGC6914 CCD and
> Tech Pan images.  Here is a webpage showing both images:
>
> http://www.webcom.com/af9y/ngc6914ccd.htm
>
> (thanks to BenDaniel for the java tip)
>
> One thing that you will notice is that the Tech Pan image has
> extra blue in the lower half of the image.  Chuck believes this
> is due to the extra UV portion of the spectrum include in the
> Tech Pan image but not in the CCD.  I have my doubts that
> there would be such an abrupt drop off going from top to
> bottom.
>
> Anyway, we're wondering if anyone out there has another
> ngc6914 color image for comparison.  It would be especially
> good if anyone else is using a wider blue filter.
>
> Thanks,
>
>
>
>
>
> Mike Cook, AF9Y
> http://www.webcom.com/af9y
> mwcook@cris.com
>
>
>
>
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