Re: Exposure suggestions needed in a hurry

[Otto Giesenfeld <otto.giesenfeld@xxxxxxxxxxxx>]

--On den 8 oktober 2000, 21:26 -0500 Gary Edwards <garyetx@xxxxxxxx> wrote:

> I'm leaving for New Mexico tomorrow to shoot documentary shots of a
> missile launch.  I plan to use Kodak High Speed Infrared in one camera to
> get the high contrast between the dark sky and the rocket contrail -
> which is white in the visible.    The launch will be 30 minutes after
> local sunrise.  There will be no chance for bracketing and I haven't been
> able to make any test shots (I know, poor preparation).
> 
> I used to shoot nudes in the landscape on HIE by setting an exposure index
> of 250 and using TTL metering with a 25A filter - results were good but I
> never shot this early in the day, or in the high desert.  I will be
> shooting due north with a 24 mm lens. Stark white gypsum in the
> foreground.  I'll be shooting an OM-4T with 120 backing paper on the
> dimpled pressure plate.
> 

This may be too late, of course, but what about taking a separate roll,
where you bracket and determine the correct exposure. In case metering at
EI250 through a 25A filter proves to be wrong at the time of day in
question, you know how much you should compensate when developing the roll
with the missile launch. (The very best would be to take two identical test
rolls, so that you can verify the push/pull development as well. Or repeat
the same subjects and exposure settings twice on one roll and cut it in two
halves to be developed separately.)

Otto Giesenfeld
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