RE: [APML] To push or not to push

["Chris Schur" <cschur@cybertrails.com>]

Sean, well, with a schmidt camera speed is not as important as an issue!

Chris

-----Original Message-----
From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
Behalf Of Sean Walker
Sent: Thursday, March 14, 2002 8:22 PM
To: astro-photo@seds.org
Subject: Re: [APML] To push or not to push


When I was shooting E-200, I pushed it 2 stops- I think it worked out fine
there. you can see my results in my Vignetting article in S&T.

Sean Walker

Chris Schur wrote:

> Scott, interesting demo, to me, it looks like the zoomed in images at the
> bottom shows the +1 stop grainier than the +3 stops.  I have settled on a
+1
> stop for the E200, you get a significant speed increase, but the grain is
> pretty much unchanged.  It also helps to really expose the slide films, to
> get off the jet black background plateau.  Does this make any sense?
>
> Chris Schur
>
> Astrophotography: http://www.psiaz.com/schur/astro/index.html
>
> -----Original Message-----
> From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
> Behalf Of Herm
> Sent: Thursday, March 14, 2002 6:01 PM
> To: astro-photo@seds.org
> Subject: Re: [APML] To push or not to push
>
> I have some close ups in my website at:
> http://home.att.net/~hermperez/e200_push_processing_comparison.htm
>
> this compares a +1 vs a +3 push (ignore the focus problem).. the
conclusion
> is
> that there is a slight increase in grain and a true increase in recording
> power.
> Note that E200 pushed +3 to ASA1000 still has less grain than the usual
> ASA400
> astro films that we use. I would not worry too much about grain with E200,
> pushed or unpushed..
>
> "Scott Hammonds" <capella@creatorsview.com>  wrote:
>
> >After searching the archives for a while and re-reading Covingtons
> >section on films, I'm trying to decide whether or not to push E200.
> >Any thoughts? Comparison shots?
> >Thanks,
> >
> >Scott Hammonds
>
> Herm
> Astropics http://home.att.net/~hermperez
>
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