Re: Films (and Portra and Thanks)

Hi Tom

Great information. I am using Portra 400VC at the
moment. I will do the tests and see what happens.
It would be interesting to compare my results with
other users.

Because the Zero2000 cameras are F138 it should be
possible to build a common body of knowledge from all
the users.

Steve

Tom Miller wrote:
>
> Hi Stephen,
>
> A technician on the Kodak technical helpline told me that the new
> Portra daylight films can take an exposure of up to 10 seconds without
> reciprocity failure. The time without failure is longer for Portra
> tungsten film. This seemed hard to believe, so I double-checked with
> a friend that beta-tests Kodak and other films. His opinion is that
> 10 seconds is not unreasonable. Its worth a try.
>
> Also, try testing a roll of film in bright daylight. Bracket one or
> two scenes widely, like over a six (or more) stop range starting at 1
> or 2 seconds, then see which exposure gives the best results. This
> will be your basic daylight exposure. Then, increase exposure in
> stops (doubles) for various lighting conditions:
> Slight Haze.........1 stop.....2x
> Light Overcast....2 stops....4x
> Heavy Overcast..3 stops....8x, etc.
> This test has reciprocity failure built into it, so you don't need to
> re-calculate it for each exposure. If you have a light meter, you can
> use differences in exposures values to determine the amount of extra
> time needed.
>
> Tom
>
> P.S. A month or so ago, I asked the list about their Portra
> experiences and would like to thank list members for their helpful
> replies. My early "tests" with 4x5 Portra 100T using an 85B filter in
> the camera show that it keeps good, natural color up to a minute or
> two (didn't get a chance to make any long, long exposures).
>
> ----- Original Message -----
> From: "Stephen Rowley" <steve@artension.com>
>
> > I am just trying out my newly acquired Zero 2000
> > (6x6)
> >
> > The Kodak site lists exposures longer than one second
> > as 'not recommended' for its films.
> >
> > Could we pool our combined expertise and bring real
> > experience to solve the problem.
> >
> > Steve
> >
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Received on Wed Apr 18 19:23:53 2001