[pure-silver] Re: Optimum results pushing 4x5 Tri-x 320 at 800 or 1600iso??
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Sun, 16 Sep 2012 18:01:40 -0700
----- Original Message -----
From: "Bogdan Karasek" <BKarasek@xxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Sunday, September 16, 2012 5:06 PM
Subject: [pure-silver] Optimum results pushing 4x5 Tri-x 320
at 800 or 1600iso??
Hello,
Needless to say, I got all sorts of contrary opinions as
to how high you can push the iso of 4x5 TX 320asa and
still get satisfactory results??? And what developer will
give those results?
They are building a new super-hospital campus with several
10-12 story buildings, not far from here, 15 minute walk.
The sides are still open and the work lights are left on
at night. Quite the spectacle. I want to catch this on
the above mentioned 4x5 sheet film, before they close up
the walls. I'm using a Toyo 4x5 CF with a 127/7.7
Ektar in a Supermatic shutter and a monopod. Lens
standard set to infinity and use the viewfinder with the
#4 mask and three loaded Grafmatics.
Any opinions dearly welcome.
Cheers,
Bogdan
I am sure you know that "pushing" mostly just increases
the contrast. If you use a developer with Phenidone or one
of its cousins it will give you about a stop more speed than
the box speed, which is usually based on a developer like
D-76. Xtol, T-Max RS, Ilford DDX or whatever its called
now, will do. The data sheets for the developers and also
the film sheets will give you some guidance.
--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@xxxxxxxxxxxxx
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