Re: [APML] Comet Ikeya-Zhang: digital enhancement

[Sean Walker <vze2c3z8@verizon.net>]

That's a great shot, Jeff!
Are you sure all the exposures are properly aligned? wouldn't the star
trails be alittle straighter if they were?

Sean Walker

Jeff Ball wrote:

> Hello all,
> I am playing around with some digital enhancement on the March shot of
> comet IZ.  I don't know if I will get another shot at this with our
> weather.  I stacked some different exposures using a one point alignment
> on the head of the comet with PW Pro and used the brighten function.
> The exposures were from 7 minutes to 15 minutes.  I varied the input of
> the shorter exposure to at most 20% as a combo with the 15 minute
> exposure.  I then used the Sean Walker technique to flat field.  I am
> now looking at ways to put the combined image on a more fixed starfield.
> I am looking at Ron Wodaski's text on CCD imaging where he discusses
> some techniques with CCD soft and Maxim DL.  I am working on getting my
> CCD soft up and running.  Any other tips would be appreciated.  The new
> version is more natural and less grainy.  I did very little on
> individual curves.  I tried that the first time around and seemed to
> make things worse.  This image is very representative of the color on
> the slide.  Thanks.
>
> http://www.astro-photography.com/i-z.htm
>
> Jeff Ball
> www.astro-photography.com
> Ohio Valley Astronomical Society
> www.ovas.org
>
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