Re: [APML] Fuji Provia 400 F Push Processing

[stephen pitt <lthuedk@pe.net>]

Hi: I hesitate going whole hog on pushing 3-stops anymore.  With push-3,
it turned towards red on an hour-long exposure (way too long?).  

But the Provia seems to be able to take pushing 2 stops without
problem.  With all the factors-including moisture, sky glo, and exposure
time to induce possible variation, I hesitate to make blanket
statements.  Fuji claims it can take push 3 without noticeable
effect-but isn't that for day creatures?

Now, I'm wondering about testing some after dehydration, ala
Elitechrome. Up to now, I haven't introduced N2 to the mix during
exposure either.

So far, I have found little risk with pushing 2 stops.  I'd be glad to
send a member with a site some images for evaluation.

Stephen 

 

John Boudreau wrote:
> 
> > > > Has anyone tested the Provia with a 1 or 2 stop push?  I scanned some
> > > > negatives that were 60 minutes at f7 and they were pretty dense.
> Seems
> > >like
> > > > a 2 stop push may have helped.  I don't remember anyone on the list
> > > > discussing pushing this film.
> >
> >
> > It's been discussed.  John Boudreau has done a lot of work with this film,
> > among others.
> >
> > Pushing will help with the scan.
> 
> Actually, I haven't pushed this film yet. Most of the time I've used it has
> been under less than ideal skies, with some light pollution. So my resulting
> slides weren't really dense.
> 
> I've seen some pushed 400F results from Stephen Pitt, and they looked pretty
> good. I believe he had been shooting at a good dark sky site. I fact these
> results *may* have helped the red response of this film. That's been
> something I've wanted to check out, if I can get to a dark site (with clear
> skies<g>) this Spring/Summer. I have been planning on a +1 push next time I
> shoot it from a dark site.
> 
> Perhaps Stephen will chime in here and give us his opinions on pushing this
> film.
> 
> I did give a short hyper to a roll last Summer, 1hr @ 50C with a hand pump
> setup. Unfortunately haze and fog came in during the test exposures. I've
> had an unbelievable streak of bad luck with weather conditions since about
> April of last year ;o(
> 
> I think it may need repeating that those who are used to E200's incredible
> red response are probably going to be disappointed with 400F on the fainter
> emission nebula. With it's strong blue response, I originally was touting
> this as a great film for galaxies. Time has shown that it gives fine results
> on the brighter emission nebula also, but E200 remains a top choice for many
> faint objects. Jon Kolb has some nice results where he used E200 for the red
> channel; and 400F for the green and blue.
> 
> John Boudreau
> jeboud@attbi.com
> http://home.attbi.com/~jeboud/astro.htm
> 
> ----- Original Message -----
> From: "Jerry Lodriguss" <jml@astropix.com>
> To: <astro-photo@seds.org>
> Sent: Wednesday, May 01, 2002 3:29 AM
> Subject: Re: [APML] Fuji Provia 400 F Push Processing
> 
> >
> > > > Has anyone tested the Provia with a 1 or 2 stop push?  I scanned some
> > > > negatives that were 60 minutes at f7 and they were pretty dense.
> Seems
> > >like
> > > > a 2 stop push may have helped.  I don't remember anyone on the list
> > > > discussing pushing this film.
> >
> >
> > It's been discussed.  John Boudreau has done a lot of work with this film,
> > among others.
> >
> > Pushing will help with the scan.
> >
> > Check the archives.
> >
> > Jerry
> >
> > Astrophoto Web Site: http://www.astropix.com
> >
> > Photoshop for Astrophotographers Book:
> > http://www.astropix.com/APBOOK/0_PROMO/PROMO.HTM
> >
> > --  APML Archives at <http://astro.umsystem.edu/apml/>  ---
> >              Unsubscribe at <majordomo@seds.org>
> >
> 
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