[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: [APML] 400F (was: Alternative Anti-Vignetting Photoshop Technique)
Thanks, Michael.
I think that you'd capture more detail on galaxies with 400F than with
PJM/PPF simply because of the much finer grain. At the image scale you have
with your refractor, the finer grain would really be noticeable, I think.
I still have two 20 roll pro-packs of PJ400 in the refrigerator, I'll
probably never use them now. When I'm up to hypering, Tony Hallas has shown
that RG200 is the way to go. I've shot 2 rolls of it with my TV85 so far and
I love it, but it's best suited to reasonably fast systems. Provia 400F will
remain my main astro film for my 12"SCT.
John Boudreau
jeboud@mediaone.net
http://people.ne.mediaone.net/jeboud/astro.htm
----- Original Message -----
From: Michael Gartland <mgartlan@iconn.net>
To: <astro-photo@seds.org>
Sent: Wednesday, January 09, 2002 12:05 AM
Subject: Re: [APML] 400F (was: Alternative Anti-Vignetting Photoshop
Technique)
> John..
> Love your Galaxy shots....I am also a Galaxy man at heart...more difficult
with
> the F/9 refractor, but hey...if it was easy we wouldn't be doing this.
>
> I have about 20 rolls of PJM in the freezer...but this Provia 400 thread
has
> peaked my interest...I imagine you would are recommend that when I finally
get
> this Rosetta Series done, and get my last roll of PPF out of the
camera..that I
> should load up this stuff for a spring Galaxy series?
>
> m.
>
> 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
> > >
> > > -- APML Archives at <http://astro.umsystem.edu/apml/> ---
> > > Unsubscribe at <majordomo@seds.org>
> > >
> > >
> > > -- APML Archives at <http://astro.umsystem.edu/apml/> ---
> > > Unsubscribe at <majordomo@seds.org>
> > >
> >
> > -- APML Archives at <http://astro.umsystem.edu/apml/> ---
> > Unsubscribe at <majordomo@seds.org>
>
> --
> Have a Nice Day!
> m
>
> Email: mgartlan@iconn.net
>
> Astro Web Site: http://members.iconn.net/mgartlan/Index.html
>
>
>
> -- APML Archives at <http://astro.umsystem.edu/apml/> ---
> Unsubscribe at <majordomo@seds.org>
>
-- APML Archives at <http://astro.umsystem.edu/apml/> ---
Unsubscribe at <majordomo@seds.org>