Re: [APML] tech pan revisited

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

Hmmm..........

Logic.  If two cameras show the symptoms then it's unlikely to be caused by
the camera itself.
            The lines are in the direction of film travel so it is caused by
either film movement or film processing.
            The lines are not on film not rolled onto the take up reel but
are on film on the take up reel.  If the take up reel was causing it they
should only be on the first turn,                     after that the film is
on film.  Unless the cause is on the sprocket guide on both cameras.
            Moisture, should cause the same effect on all the processed
film.
            It's on the film and not a scanning artifact.
            Care was taken while unloading the camera and loading onto the
developing reel?

Conclusion:  You've been PUNKED (G)

Sorry Scott it remains a mystery.

Jim

----- Original Message ----- 
From: "Scott Hammonds" <shammonds@creatorsview.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Wednesday, September 03, 2003 9:14 AM
Subject: [APML] tech pan revisited


> For those interested parties, I finally had a chance to work on the tech
> pan issues that plagued me from the beginning of this year.
>
> As a reminder I was having problems with vertical lines running up and
> down the exposed frame, an example is posted at the bottom of page
> linked below. The top image has been quickly processed, the other 2 are
> raw scans.
>
> My tech pan was hypered by Jim Janusz and has been kept in the freezer
> in zip locked baggies with desiccant since arriving from Jim.
>
> I only took 2 frames on Monday night to avoid having those 2 frames get
> rolled up on the camera spool after exposure. That was the only thing I
> could pinpoint from my attempts in January causing the vertical lines.
> As can be seen from the 2 images on the page, no vertical lines,
> however, on part of the developed strip those lines showed up again.
> They were on the part that was wound up on the camera spool.
> http://www.creatorsview.com/pages/demo.html
>
>
> It is bizarre, no other film does this in this camera. I have used E200,
> RG200 hypered, and Supra 400 all in the last week and nothing of the
> sort happened. Here is a link to a Supra 400 shot from last week.
> http://www.creatorsview.com/pages/display.html It still needs work but
> you get the idea.
>
> I'm still not sure what is causing the problem, but for now, I can shoot
> 2 frames before having to take the film inside for developing. While not
> a bad thing to see your results immediately, I'd like to be able to keep
> shooting when the sky is clear. At least now I know what not to do.
>
> Confused in B&W,
>
> Scott Hammonds
>
>
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo


_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo