red eye is caused by the infra red flash that bounces off the retina lens at the rear of the eye this we dont see just milli seconds before the main flash is fired at the subject hence the expression red eye.
2007-01-18 10:17:05 · 7 answers · asked by Anonymous in Consumer Electronics ➔ Cameras
That is incorrect. Red-eye is all caused by visible light, from the main flash firing. Older cameras were larger with a lot more use of external flash. Newer cameras are smaller with on board flash very close to the lens, this presents a near perfect 180º return path for the light from the flash. This is what allows the light to hit the retina and bounce back to the lens. It appears red because of the blood vessels near the retina.
Pre-flashes are never within the time of the shutter release and are never captured by the camera.
2007-01-18 10:51:02 · answer #1 · answered by teef_au 6 · 2⤊ 1⤋
Agree with teef. To capture infra red light bouncing back off your retina you would need infra red film in your camera! normal colour film wouldn't pick up infrared. So even if it was due to IR you wouldn't see it in the photo anyway! Its the light from the flash that causes red eye hence its most often seen in night shots/inside shots where its dark and you use flash.
2007-01-18 20:03:37 · answer #2 · answered by heavenlyprinceoffrogs 2 · 2⤊ 1⤋
It also helps to keep the flash as far away as possible from the lens. That's why you see the pros use a higher flash.
2007-01-18 22:38:26 · answer #3 · answered by johN p. aka-Hey you. 7 · 1⤊ 0⤋
Its the `Cones` + `Rods` that causes Red Eye.
2007-01-21 21:08:12 · answer #4 · answered by CLIVE C 3 · 0⤊ 0⤋
Ignorance runs rampant on Yahoo Answers.
2007-01-18 20:34:13 · answer #5 · answered by Ara57 7 · 2⤊ 0⤋
Kendaland - yours was a question but the main topic wasn't.
2007-01-18 18:25:26 · answer #6 · answered by The Dragon 2 · 0⤊ 1⤋
ummm...is this a question?
2007-01-18 18:24:17 · answer #7 · answered by kendalandsam 3 · 1⤊ 1⤋