Exposure Overview.
The following exposure times apply to
sunshine for the time 1 hour after sunrise
to 1 hour before sunset. The exposure
times should be doubled in the shade,
quadrupled when the sky is overcast, and
quadrupled when the sky is cloudy and
lead-grained.
A prerequisite is the use of Agfa-Isochrom
Film 26° Scheiner. (~ISO 25)*
Outdoors:
Glacier, snowy landscape, open beach:
Instantaneous with Aperture 16.
Landscapes: Instantaneous with Aperture 11.
Close-ups or easy creation:
Instantaneous with Aperture 8.8.
Indoors:
In a light room (light walls, light floor) at
the window 1-2 seconds with full opening.
In a dark room (dark walls and furniture,
dark floor) at the window with full opening
for 3-4 seconds. If the object being
photographed is more than 1 m away from
the window, the exposure times must be
doubled: if the distance is 2-3 m, the
exposure times should be 4-8 times longer.
* Converted value since the Scheiner film speed system is obsolete
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