Re: [APML] TP for terrestrial work

[Tim Povlick <potentate@cox.net>]

Jerry Lodriguss wrote:

>
>> 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.
>
>
>
>
> That is because you are using an extremely high contrast developer 
> with an extremely long development time for a normal scene, sunlight 
> on the earth.
>
> D-19 and 8-10 minutes are for extremely low contrast deep-sky objects, 
> not normal daytime terrestrial photography.
>
> For daylight subjects, try Technidol.
>
> You have to match the subject contrast range to the developer and dev 
> time.
>
> Jerry
>
>
Thanks Jerry, I'll pick up some Technidol. Appreciate
your input.

----
Tim

>
>
>
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> Astronomical photography: http://www.astropix.com
>
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