Re: [APML] Stacking film images

["Bradley Hope" <bradley@thorngarden.net>]

----- Original Message ----- 
From: "Bert Katzung" <katzung1@comcast.net>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Sunday, November 16, 2003 12:54 PM
Subject: Re: [APML] Stacking film images


> Hi Bradley:
> Registax is designed for stacking multiple frames from *.avi (webcam)
image
> files. I'm not familiar with Astrostack but I suspect it has the same
goal.
> I don't think that they are at all suitable for stacking film images,
> although I admit I've never tried.
> Stacking of film images: yes, you should expose each frame fully; don't
ever
> underexpose an astro-image. Are you planning on film images of bright
> objects (planets, moon) or deep sky objects (nebulas, galaxies)? Remember
> that exposing a deep sky astro image fully means getting the background
> "fog" up to the optimal level; you can never get the target object really
up
> to the levels that you would expect with a daylight target. So stacking
film
> frames of a deepsky target is always useful as a way of minimizing grain.
> Check out Jerry Lodriguss' website and his CD-rom book as well as Robert
> Reeve's and Michael Covington's books; all very useful sources for
> astro-imaging on film information.
> Bert
>
> Bert Katzung
> katzung1@comcast.net
> www.astronomy-images.com
>

Thanks for the feedback, Bert.

I've already found Jerry's website, and have perused it over and over again.
Both his and Michael's books are on my wish list for Christmas (perhaps the
hints I've dropped will bear fruit).

I'll be doing both planetary and deep sky. Though I know many say that
planetary imaging can best be done digitally, I still want to try.

Again, thank you.
Clear skies

Bradley Hope
http://astronomy.thorngarden.net

No matter where ya go...there ya are.

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