Re: [APML] comet pix

["Mike Unsold" <mike@mlunsold.com>]

Henrik

Darkening the background adaptively causes a small increase in contrast in
the brighter areas without losing faint stars etc..  I agree that this
process can improve most images. I think more along these lines could be
done with
 http://home6.inet.tele.dk/hrj/dubbel-cluster.htm  but as you say - it is a
matter of taste.

Mike

----- Original Message -----
From: "henrik rosenørn" <hrjo@mail.tele.dk>
To: <astro-photo@seds.org>
Sent: Wednesday, March 20, 2002 5:52 AM
Subject: Re: [APML] comet pix


> Hi Dick
>
> I usually prefer not to increase contrast too heavily.
> Rather darken the the picture, increase contrast slightly and "highlight
midtones"
>
> I think my nicest pictures has derived using this method. Eg.:
> http://home6.inet.tele.dk/hrj/Rosette.htm (B&W ex.)
> http://home6.inet.tele.dk/hrj/dubbel-cluster.htm (Color ex.)
>
> In other cases with lots of stars, an extreme contrast works fine. Eg.:
> http://home6.inet.tele.dk/hrj/ngc7000.htm
>
> But it is also a matter of "taste" how you prefer it...
>
> Henrik
>
>
> ----- Original Message -----
> From: "Mike Unsold" <mike@mlunsold.com>
> To: <astro-photo@seds.org>
> Sent: Wednesday, March 20, 2002 11:41 AM
> Subject: Re: [APML] comet pix
>
>
> Hi Dick
>
> Very nice image!
>
> Have you tried to reduce the grain in the background and increase contrast
> with the comet?
> Smoothing out the grain and increasing contrast can be difficult to do
with
> loosing the tail.
>
> Mike
>
> ----- Original Message -----
> From: "Dick Locke" <rlocke1@houston.rr.com>
> To: <astro-photo@seds.org>
> Sent: Tuesday, March 19, 2002 11:13 PM
> Subject: [APML] comet pix
>
>
> > Greetings,
> >
> > Here's a picture of coment Ikeya Zhang.  I took this week in Wimberly,
TX
> last week.
> >
> > http://home.houston.rr.com/dtlocke/images/comet-I-Z1.jpg
> >
> > Technical Details:  Nikon F2 camera, Nikon 300 f2.8 lens wide open, ~4
> minute
> > exposure unguided, Losmandy G-11 mount, Kodak LE 400 film, Nikon
Coolscan
> IV ED
> > film scanner, quick and dirty processing in photoshop.
> >
> > Regards,
> >
> > -Dick Locke
> >
> >
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