firing button is depressed. Typical Brief Time
exposures are given below :—
INTERIOR PHOTOGRAPHY BY
DAYLIGHT WITH SELOCHROME FILM
Recommended exposure times at f/16
Showing the tripod leg extended and the camera on a firm
support for taking Brief Time exposures.
WEATHER
CONDI-
TIONS
Intense
Sunlight
Bright
Sunlight
Cloudy—
bright
D u l l -
cloudy
Very
dull
COLOUR OF WALLS
Dark
15 sec.
30 sec.
1 min.
2 min.
4 min.
Medium Light
8 sec.
15 sec.
30 sec.
1 mill.
2 min.
4 sec.
8 sec.
15 sec.
30 sec.
1 min.
This table is suitable for use between approxi-
mately 9 a.m. and 3 p.m. (G.M.T.) during the
summer months and it can also be used in winter
between approximately 10.30 a.m. and 1.30 p.m.
if the indicated exposure times are doubled. It
assumes that light can enter the room freely ;
where there is only one window, exposures should
be increased by 50-100 per cent. For portraits
within 6 feet of a window, give one-quarter of the
indicated exposure.
If HP3 film is used instead of Selochrome, the
exposures recommended above can be halved.
Summary of Contents for Prentice
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