Re: [APML] Comet & M13, other

["Bert Katzung" <katzung1@attbi.com>]

Hi Matt:
Thanks for the comments. I had missed that stacking artifact---thanks for
pointing it out.That's what comes of imaging an object on two successive
nights.  Looks like I'll have to crop that part off the bottom.

I am still struggling with the MBD technique for anti-vignetting and trying
to adjust the colors in the blurred layer is a major stumbling block. I
fooled with your LMC challenge image for a while and  made very little
progress. It would be great if you could web-publish the details of the
final "winning entry" in that challenge.
Bert

Bert Katzung
katzung1@attbi.com
www.astronomy-images.com

----- Original Message -----
From: "Matt BenDaniel" <matt@starmatt.com>
To: <astro-photo@seds.org>
Sent: Sunday, May 19, 2002 7:22 PM
Subject: Re: [APML] Comet & M13, other


> At 02:46 PM 5/19/2002 -0700, Bert Katzung wrote:
> >Hi List:
> >Here's my latest comet shot, on EC200 this time.
> >http://www.astronomy-images.com/images/comets/Ikeya-Zhang.M13.15May.htm
>
> Bert,
>
> Great shot. Well processed.
>
> >I can't see much of a tail on I-Z anymore---making it out on this image
may
> >be optimism more than anything else. I've tried it with both print and
slide
> >films and that doesn't seem to make much difference. Furthermore, I can't
> >get my ST-4 to guide on the comet anymore---had to guide on a star. But
it's
> >been a nice ride! Thank you,  I and Z!
> >I also tried an early season medium format shot of the North
America/Pelican
> >on Provia 400F. Big improvement over my earlier attempts! This was
scanned
> >at 1200 ppi (the best I can do on 6x7 format).
> >http://www.astronomy-images.com/images/Nebulas/NoAm-Pelican.htm
>
> Need to see higher resolution to more fully appreciate/evaluate image.
> I'd boost the green channel.
> Can you fix stacking artifact at lower right?
>
> --
> Matt BenDaniel
> matt@starmatt.com
> http://starmatt.com
>
>
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