Re: [APML] Black Negs a new developement

["Jim Janusz" <jjanusz@dc.rr.com>]

Chris,

Good point, I forgot about that as I mix fix fairly often and have never
depleted it.  It could also have been incorrectly mixed and not be providing
sufficient fixing.

Jim
----- Original Message -----
From: "Chris & Jennifer Cook" <ccjd@ix.netcom.com>
To: <astro-photo@seds.org>
Sent: Tuesday, December 11, 2001 6:03 PM
Subject: Re: [APML] Black Negs a new developement


> The only other thing I can think of besides severe light fogging that
would
> cause the whole film to go black would be insufficient fixing or totally
> depleted fixer.  Either of these can cause dark fogging thoughout the
film.
> It's usually not totally black though.....unless the fixer was totally
> exhausted.
>
> Chris
>
>
> ==================
> Chris Cook
> Astronomical Photography
> www.abmedia.com/astro
>
> -----Original Message-----
> From: Jim Janusz <jjanusz@dc.rr.com>
> To: astro-photo@seds.org <astro-photo@seds.org>
> Date: Tuesday, December 11, 2001 4:23 PM
> Subject: Re: [APML] Black Negs a new developement
>
>
> >Hi Sean,
> >
> >I don't agree, as the film is black to the edges.  I don't think there is
> >anything that can do this during an exposure except a light leak of some
> >sort.  If it were just over exposed it would only be in the frame of the
> >exposure.
> >
> >Jim
> >
> >----- Original Message -----
> >From: "Sean Walker" <vze2c3z8@verizon.net>
> >To: <astro-photo@seds.org>
> >Sent: Tuesday, December 11, 2001 3:21 PM
> >Subject: Re: [APML] Black Negs a new developement
> >
> >
> >> Thats your problemif you did long exposures. Hypered TP loves LP- it
> soaks
> >it
> >> up.
> >>
> >> Sean Walker
> >>
> >> Brian Sledz wrote:
> >>
> >> > Light Pollution??? oh yeah.  30 miles west of Chicago.  Best nights
mag
> >4.5
> >> > overhead, to the east mag 2, west mag 4.2ish.  But I have new
insights.
> >I
> >> > took e200 with the Lumicon h alpha filter last night.  I went 40 30
and
> >20
> >> > minutes.  I got a nice California nebula at f4 in  only 20 minutes.
> >> > Brian
> >> > ----- Original Message -----
> >> > From: "Sean Walker" <vze2c3z8@mail.verizon.net>
> >> > To: <astro-photo@seds.org>
> >> > Sent: Tuesday, December 11, 2001 2:58 PM
> >> > Subject: Re: [APML] Black Negs a new developement
> >> >
> >> > > Arre you shooting this hypered techpan in light pollution?
> >> > >
> >> > > Sean Walker
> >> > >
> >> > > > From: "Brian Sledz" <brianhome@email.msn.com>
> >> > > > Reply-To: astro-photo@seds.org
> >> > > > Date: Tue, 11 Dec 2001 11:57:39 -0600
> >> > > > To: <astro-photo@seds.org>
> >> > > > Subject: Re: [APML] Black Negs a new developement
> >> > > >
> >> > > > Hi Jerry,
> >> > > > No but in this case it was 35mm, last week's black negs were 120
> >without
> >> > > > sprockets. ;-]
> >> > > > Brian
> >> > > > ----- Original Message -----
> >> > > > From: "Jerry Lodriguss" <jml@astropix.com>
> >> > > > To: <astro-photo@seds.org>
> >> > > > Sent: Monday, December 10, 2001 2:30 PM
> >> > > > Subject: Re: [APML] Black Negs a new developement
> >> > > >
> >> > > >
> >> > > >>
> >> > > >>>
> >> > > >>> Yep the negs are black out to the sprockets.  But I used a
> >changing
> >> > bag
> >> > > > plus
> >> > > >>> a dark room this time.  Light leak???? hmmm.  I just got back
> some
> >> > e200 I
> >> > > >>> shot with same set up and they are ok.  And I had the
viewfinder
> >off
> >> > the
> >> > > >>> camera.  So I doubt the 6x7 Pentax is leaking.
> >> > > >>
> >> > > >>
> >> > > >> 6x7 film doesn't have sprocket holes does it?
> >> > > >>
> >> > > >>
> >> > > >> Jerry
> >> > > >>
> >> > > >> Astrophotography, Tips and Techniques
> >> > > >> for Digital Enhancement in Photoshop:
> >> > > >> http://www.astropix.com
> >> > > >>
> >> > > >> --  APML Archives at <http://astro.umsystem.edu/apml/>  ---
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