The Reflector; Red Eyes' Phenomenon - Nikon SB-10 Instruction Manual

The Reflector
On the 5B-10, the reflector tilts through
an arc of 180
0
with click-stops every
90~
With the speedlight unit mounted on the
camera, set the reflector in the horizontal
position (calcul ator. on top). The use of
the speedlight in the vertical position is
generally not recommended, since this will
result in the coverage of light falling off
at the corners.
'Red
Eyes'
Phenomenon
'Red eyes,' an optical phenomenon in
which a subject's eyes appear red in
photographs taken with a flash unit, are
a result of the flash light directly illumi-
nating the retina. This happens when the
subject looks straight into the camera
on which a flash unit is mounted. The
effect becomes more pronounced if there
is little or no ambient light. In this case,
the iris of the eye is wide open, and the
illuminated retina is clearly visible.
To avoid 'red eyes' you can take any or
all of the following steps :
1. Brighten the room to minimize the
opening of the subject's pupils.
2. Instruct the subject not to look
straight into the camera.
3. Keep the flash unit as far away as
possible from the camera by means
of a sync cord .
Note that once 'red eyes' appears, there is
no way of retouching the negatives.
15