Re: [APML] TP for terrestrial work

["John C. Mirtle" <jmirtle@shaw.ca>]

Tim;
    Tech Pan's speed and contrast depend on the developer used. D19 gives
about the highest contrast you can get, short of tossing the thing into
Dektol. For pictorial work you need a MUCH lower contrast. Try using
Technidol developer for 10 minutes with an ASA setting of 25 on the camera.
HC110 dilution F (from stock!) for 10 minutes works with an ASA of 32 to
64ish. At a push, you could also use D76. Use a shorter development of 6
minutes and expose for 64 ASA. This should help bring out some gray areas,
between the black and white.

John Mirtle
Calgary, Ab. Canada

----- Original Message -----
From: "Tim Povlick" <potentate@cox.net>
To: <astro-photo@seds.org>
Sent: Tuesday, July 09, 2002 8:58 PM
Subject: [APML] TP for terrestrial work


>
> I've been trying to use Technical Pan in a Pentax 67II camera
> on terrestrial subjects to get the kinks out of the process
> before moving into celestrial work.  I had come to the conclusion
> that TP is strange stuff and wouldn't work as a normal B&W film
> unhypered until I saw Mt. Leroi's stunning moon picture.  What
> I am seeing is parts of the image are either way over exposed
> or way under exposed, there is no in between.  It's like the
> middle range of the contrast has been nulled out.
<- snip ->


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