Pentax UC-1 UC-1 Manual - Page 43

Flash, Effective, Ranges, Films, Other, Phenomenon, Photography

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FLASH EFFECTIVE RANGES WITH FILMS OTHER THAN ISO 100,200 or 400 AND RED-EYE PHENOMENON IN FLASH PHOTOGRAPHY The correct camera-to subject distances when using films other than ISO 100, 200 or 400 are indicated in the table below. ISO Distance 25 0.3-1.9m 50 0.3-2.6m 800 0.5*-11.3m 1600 0.7 *-16.0m 3200 0.9 *-22.5m * With high speed film, overexposure may occur at close range due to the film's high speed. Red-eye phenomenon in flash photogra- phy When a picture is taken using a flash, a subject's eyes may appear red in the print. This phenomenon is caused by the reflection of the electronic flash in the retina. It can be reduced when the surroundings of the subject are brightened, or shooting distance is shortened or by employing the red-eye reduction flash feature. 39

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FLASH
EFFECTIVE
RANGES
WITH
FILMS
OTHER
THAN
ISO
100,200
or
400
AND
RED
-EYE
PHENOMENON
IN
FLASH
PHOTOGRAPHY
The
correct
camera
-to
subject
distances
when
using
films
other
than
ISO
100,
200
or
400
are
indicated
in
the
table
below.
ISO
25
50
800
1600
3200
Distance
0.3-1.9m
0.3-2.6m
0.5
*
-11.3m
0.7
*
-16.0m
0.9
*
-22.5m
*
With
high
speed
film,
overexposure
may
occur
at
close
range
due
to
the
film's
high
speed.
Red
-eye
phenomenon
in
flash
photogra-
phy
When
a
picture
is
taken
using
a
fl
ash,
a
subject's
eyes
may
appear
red
in
the
print.
This
phenom-
enon
is
caused
by
the
reflection
of
the
electronic
flash
in
the
retina.
It
can
be
reduced
when
the
surroundings
of
the
subject
are
brightened,
or
shooting
distance
is
shortened
or
by
employing
the
red
-eye
reduction
fl
ash
feature.
39