Red eye – Nikon SB 11 User Manual
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"RED EYE'^^---------------------
"Red eye" is a phenomenon in flash photography where
the center portions of the subject's eyes appear as bright
red orbs in color photographs (or white in black and
white pictures). This is a result of the light from the flash
illuminating the retina directly. If the subject looks
straight into the lens and there is little or no ambient
light, the pupil is wide open, making the retina clearly
visible in the picture.
To avoid "red eye," you can take any or all of the follow
ing precautions:
1. Ask the subject not to look directly into the lens when
the picture is taken.
2. Remove the flash unit from the camera and hold it as
far away as possible from the camera by using a sync
cord.
3. Increase the room's overall illumination to reduce the
opening of the subject's pupils.
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