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Re: [APML] 400F (was: Alternative Anti-Vignetting Photoshop Technique)
Hi Bert:
Sorry for stating my very highest praise for a film in such terms. There is
nothing I dislike about P400F, except the price. P400F can record changes in
colour temperature that push the limit of the words subtle and distinct. Strong
secondary and tertiary hues are recorded, opening new doors of exploration.
Provia 400F will keep me and my kind in emulsion a bit longer. It will play as
a real contributing layer with other films. Its those colours that can be
found.
After a year of using P400F, I logged in here and discovered John Boudreau as
the sole user of this unique film. Amazing, thats all.
Stephen Pitt
Bert Katzung wrote:
> Sorry, Stephen, this is one of the more baffling postings I've seen on APML.
> I assume the first sentence means you hate this film. Could you tell us why?
> And I have no idea at all what the last sentence means. Is it an in joke
> with someone on the list? Please let us in on it....
> Bert
>
> Bert Katzung
> katzung1@attbi.com
> www.astronomy-images.com
>
> ----- Original Message -----
> From: "stephen pitt" <lthuedk@pe.net>
> To: <astro-photo@seds.org>
> Sent: Tuesday, January 08, 2002 10:17 PM
> Subject: Re: [APML] 400F (was: Alternative Anti-Vignetting Photoshop
> Technique)
>
> Provia sucks...evenly. You know what that means, don't you? We're not
> alone
> any more. Stephen Pitt
>
> John Boudreau wrote:
>
> > > Is 400F the best slide film for galaxies currently available? Sorry, I
> > > haven't been following this thread from the beginning.
> > >
> > > Ulrich
> >
> > Hi Ulrich.
> > The "Provia 400F for galaxies" comment you're recalling was most probably
> > made by me. I've been shooting it since February of last year, and find it
> > to be the best overall UNHYPERED color film for galaxies I've yet tried.
> > It's unhypered blue response is much better than E200. BTW --- I have also
> > used E200 with success on galaxies, but overall the color balance of 400F
> is
> > much better than E200, IMO. Provia 400F also shines for objects other than
> > galaxies as both Jon Kolb and Matt BenDaniel have shown recently, and it's
> > super fine grain stablemate, 100F, is THE BEST color film to shoot the
> > smaller, very high surface brightness planetary nebula.
> >
> > Some 400F galaxies:
> > http://people.ne.mediaone.net/jeboud/m51.htm
> > http://people.ne.mediaone.net/jeboud/m82.htm
> > http://people.ne.mediaone.net/jeboud/m87.htm
> >
> > Some E200 galaxies:
> > http://people.ne.mediaone.net/jeboud/m65_m66.htm
> > http://people.ne.mediaone.net/jeboud/m81.htm
> >
> > I should note that the blues in the E200 shots were stretched quite a lot
> in
> > Photoshop. And what may seem like inconsistent exposure times are mostly
> due
> > to nasty New England clouds sneaking up on me at times <g>.
> >
> > While I'm on the subject, having read other's comments and questions on
> 400F
> > today, I should add that:
> >
> > 1. The 400F doesn't have the red sensitivity of E200, but IMO E200 is
> *too*
> > sensitive to reds, compared to it's response to other colors. Of course,
> for
> > the faintest red nebula, this is a plus for E200. But for many subjects, I
> > think the color balance of 400F is much better than E200. Matt's recent
> M42
> > is an outstanding example:
> > http://people.ne.mediaone.net/mbendaniel1/gallery/astro/sword.html
> >
> > 2. 400F has much finer grain than any 400 class color negative film I can
> > think of, but is not quite as fine grained as E200, but reasonably close.
> >
> > 3. I tend to agree with Marco's statement that 400F acts a bit slower than
> > ISO 400 in practice. Some local pro photographers have mentioned to me
> that
> > they think this is so also. But they still love it :o)
> >
> > 4. I have hypered a roll for 2 hrs, 50 degrees C at +3 psi (hand pump
> > vacuum). Unfortunately the skies didn't cooperate that night as haze and
> > later fog showed up, but what I *can* say is that there was no strong
> color
> > shift, but blues may have been hurt somewhat, reds appeared _very_
> slightly
> > stronger. The overall differences were slight, and this really needs more
> > testing. I think a very short hyper of an hour or even a bit less may help
> > just might be a good thing for overall sensitivity. But with this film's
> > fine unhypered reciprocity characteristics, I'll probably stick to using
> it
> > unhypered. I have not pushed it, but I have seen a NGC 7000 shot from
> > another APML member that was pushed 2 or 3x that looked pretty good.
> >
> > 5. Even though I have applauded 400F's blue response, It's certainly no
> > hypered RG200 in that regard. But I think it's the best overall unhypered
> > astro film, however E200 may still be preferred by some for the very
> > faintest red subjects.
> >
> > John Boudreau
> > jeboud@mediaone.net
> > http://people.ne.mediaone.net/jeboud/astro.htm
> >
> > ----- Original Message -----
> > From: Ulrich Beinert <analemma@gmx.de>
> > To: <astro-photo@seds.org>
> > Sent: Tuesday, January 08, 2002 12:54 PM
> > Subject: AW: [APML] 400F (was: Alternative Anti-Vignetting Photoshop
> > Technique)
> >
> > > Is 400F the best slide film for galaxies currently available? Sorry, I
> > > haven't been following this thread from the beginning.
> > >
> > > Ulrich
> > >
> > > -----Ursprüngliche Nachricht-----
> > > Von: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]Im
> > > Auftrag von Herm
> > > Gesendet: Dienstag, 8. Januar 2002 18:50
> > > An: astro-photo@seds.org
> > > Betreff: Re: [APML] 400F (was: Alternative Anti-Vignetting Photoshop
> > > Technique)
> > >
> > >
> > > Matt, I dont like using E200 for galaxy shots, it just does not work
> > well..
> > > on
> > > the other hand its excellent for red stuff..
> > >
> > > Matt BenDaniel <matt@starmatt.com> wrote:
> > >
> > > >I think E200 is good for subjects that don't
> > > >have a lot of red in them, like reflection nebulae and galaxies. E200
> > > >is good for recording faint red nebulosity and for short exposures of
> > > >red nebulae
> > >
> > > Herm
> > > Astropics http://home.att.net/~hermperez
> > >
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> > >
> > >
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