Dealing with red-eye
When you photograph a person in dim light using flash, the pupil of the eye will sometimes appear red. Under low light, the pupils of the eye dilate for better vision. Red-eye is caused by light from the flash entering the dilated pupils and being reflected back to the lens. Red-eye reduction causes a preliminary flash to fire before the actual picture is taken. This causes the pupil to contract, reducing this reflection. When the actual flash exposure is made, the degree of reflection is minimized, thus reducing red-eye.
When using red-eye reduction mode
•Ask your subject to look directly into the camera.
•Approach as closely as possible to make your exposure.
