Re: [APML] TP woes and questions

[Brian Sledz <brianhome@linkus.net>]

Hi Roland,

I had the same thing happen with similar conditions.  Lumicon film, mag 
4 skies, ha filter, my own developing.  I took daytime pictures and 
developed them, no problem.  I think the Lumicon batch was bad.  I 
switched over to E200 with an ha filter for a time.

Brian

On Saturday, October 4, 2003, at 06:15 PM, Roland Roberts wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
>
>>>>>> "Tony" == Tony Hallas <tonyhallas@foothill.net> writes:
>
>     Tony> Roland, Let me see if I understood you ... this hypered TP
>     Tony> is 2.5 years old??? My guess is that you probably picked up
>     Tony> every cosmic ray in the Universe during this time ... the
>     Tony> film is probably completely fogged ... and Lumicon has a
>     Tony> penchant for hypering on the "heavy" side so the film
>     Tony> already had significant hyper fog to start with ... I would
>     Tony> definitely develop a small piece to see what you have there.
>
> Speaking on the basis of my PhD in nuclear physics, I can assure you I
> missed at least a few cosmic rays :-)
>
> But yeah, it's 2.5 years old.  I have some newer stuff that is only 2
> years old.  It's all been in the freezer for that whole time.
>
> I guess once I can clear some space out in my garage, I can try to get
> my own hypering kit.  I'm mostly trying to see if I can get anything
> from my urban setup here in Brooklyn, and TP + the Wratten 92 seemed
> the best bet.  Skies are about mag 4.5 on the *really* good nights,
> but typically about mag 4.  And that means sticking near the zenith,
> say 45° and higher; certain directions are just out (don't look toward
> Manhattan!).
>
> I'll try to do a small piece at several different development times to
> see what I can get.  Since 12 minutes was obviously a bit much, I'll
> back down to 10, as John Mirtle suggested, and then back to 8 if need
> be.  If that doesn't do the trick, I might be back here asking for
> someone to hyper some film for me; or maybe I'll try the new Lumicon
> to see if a new roll works better.
>
> It should be noted that even when the file was a mere 1-1/2 years old,
> I got the same effect; that was 7 min in D-19.  And when it was a mere
> couple of months old I got the same effect on a different roll from
> the same batch, again 7 min in D-19, but I may have mishandled that
> roll, so it's hard to be sure.
>
> Now I need the clouds to go away....
>
> Thanks,
>
> roland
> - --
> 		       PGP Key ID: 66 BC 3B CD
> Roland B. Roberts, PhD                             RL Enterprises
> roland@rlenter.com                            6818 Madeline Court
> roland@astrofoto.org                           Brooklyn, NY 11220
>
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