P3D Extended Sunny Day Rule

["Dr. George A. Themelis" <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Reposted from a past digest:

For the Realist and 100 ASA film, follow the Revised DrT rule :-):
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+1 1/150 @ f16  sand or snow under bright sun
 0 1/100 @ f16  *sunny day rule* (front bright sunlight, dist. shadows)
-1 1/100 @ f11  hazy sun, soft shadows, side lighting
-2 1/100 @ f8   cloudy & no shadows, sunset w/sun, moon
-3 1/50  @ f8   heavy overcast, bright shade
-4 1/50  @ f5.6 dark shade, twilight at sunset
-5 1/25  @ f5.6 Skyline just after sunset, tree shade
   -- Limit of hand-holding, use tripod for the following --------------
-6 1/5  @ f8    N. window light, forest shade, shows w/carbon-arc sptlght
-7 1/2  @ f8    Brightly illuminated offices, store windows, sport events
-8 1    @ f8    Minimum office illum., city streets, stage shows avg.lig.
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I borrowed the low light situations from "Harris Photoguide" for Existing
Light, copyright 1989.

-- George Themelis


PS. I think most errors are in overestimating the amount of light
    present.  For example, who might have thought that the proper
    exposure for "forest shade" six stops below sunny day...


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