Pentax K100 D Operating Manual page 59

Using Red-eye Reduction Flash
"Red-eye" is the phenomenon where eyes look reddish in photographs
taken in dark environments with a flash. This is caused by the reflection of
the electronic flash in the retina of the eye. Red-eye occurs because pupils
are dilated in dark environments.
This phenomenon cannot be averted but the following measures can be
used to combat it.
• Brighten the surroundings when shooting.
• Set to wide angle and shoot from closer if a zoom lens is in use.
• Use a flash that supports red-eye reduction.
• Position the flash as far away from the camera as possible when using
an external flash.
The red-eye reduction function on this camera reduces red-eye by
discharging the flash twice. With the red-eye reduction function, the
pre-flash is discharged just before the shutter is released. This reduces
pupil dilation. The main flash is then discharged while the pupils are
smaller, reducing the red-eye effect. To use the red-eye reduction
function, set i (Red-eye reduction auto flash) in Picture mode or j
(Red-eye reduction manual flash) in other modes for Flash mode.
Daylight-Sync Shooting
In daylight conditions, the flash will eliminate shadows when a portrait
picture is taken with a person's face cast in shadow. Use of the flash in this
way is called Daylight-Sync Shooting. Flash is discharged manually when
shooting with Daylight-Sync Shooting.
Taking pictures (Auto Picture)
1 Confirm that the flash has popped up and the flash mode is set to h
(Manual discharge). (p.56)
2 Confirm that the flash is fully charged.
3 Take the picture.
The picture may be overexposed if the background is too bright.
Without Daylight-Sync With Daylight-Sync
57
3