Exposure suggestions needed in a hurry

["Gary Edwards" <garyetx@xxxxxxxx>]

Greetings,

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.

Any suggestions for exposure?

Thanks
Gary Edwards

people, places, flight at: http://members.home.com/garyetx/index.htm

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