Have you ever noticed that sometimes when you take a picture of someone with blue eyes, their eyes usually turn out red in the picture? Why is it mostly people with blue eyes this happens to?
I know it's called red eye and there are ways to fix it. I was just wondering why this happens. Is there a reflection or something with the flash?
2007-03-13 08:15:41 · 12 answers · asked by Wendy 5 in Arts & Humanities ➔ Visual Arts ➔ Photography
This is not unique to blue-eyed people; the iris isn't what turns red, it's the pupil. The camera is essentially illuminating the retina, and captures a picture of that (since the pupil is a lens in and of itself, the camera can see right through). The retina is full of blood vessels, so you end up with red colored pupils.
2007-03-13 09:05:12 · answer #1 · answered by Mat M 1 · 2⤊ 0⤋
It is an action that is caused by the flash being too close to the lens so that it does not hit the subject at an angle.
You have to remember with flashes tht the angle of incidence (how the light hits the eyes in this case) is = to the angle of reflectance. So if you put your flash even as little as 8-10 inches, probably less will work also, the flash will bounce not toward the camera, but at the angle the light hits the eyes.
You can also bounce your light so that the hard burst does not hit the eyes directly, but at an angle. You have to adjust for the distance. If, for instance, you are bouncing off the ceiling (and that should be white or you will get some discoloration) y ou have to calculate the distance from the flash to where it is hitting the ceiling and then calculate the distance from the spot on the ceiling to the subject. Put your flash on manual and set the distance scale to the actual distance the light is going
The main problem with digitals is that many do not have a PC connector to attach an off camera flash, they have their flashes just above the lens and in shooting pictures of animals and people, you will get eye problems. Some animals have a red back of the eye, others have yellow. I have a dog who always looks like Satan himself where there is red eye. If you take a picture of an alligator, for instance, it bounces back either yellow or a yellowish orange.
Explaining the anatomy of the back of the eye ball, which is where the colors come from, is of little significance, changing angles is the cure. Don't take a picture straight on the face, ask your subject to change the position of their head to the right or left.
2007-03-13 12:41:07 · answer #2 · answered by Polyhistor 7 · 3⤊ 0⤋
It happened because the flash was not bounced off
a ceiling. If the flash is directed right into the eye it hits the blood vessels in the back of the eye. It probably happens more with blue eyes because blue eyes are light to begin with, not dark like brown eyes. You can angle your flash so it doesn't go directly into the persons eyes. Also you will get better results if the flash on your camera is as far above the lense as possible.
2007-03-13 09:06:25 · answer #3 · answered by trendy 1 · 1⤊ 0⤋
It is because of the flash light strike the pupil. You can see the red-eye effect when the distance / angle between the flash and the main lens it is too small. That so it is very visible on small / compact cameras with built in flash where the the flash is very close to the main lens. To reduce the red-eye effect the camera must have a red-eye reduction flash mode = the flash fires multiple bursts. Another choice is to pick a camera with a pop-up built-in flash type.
The best solution: don't use the flash. If you need to use an external flash + diffuser + bounce it to ceiling.
2007-03-13 15:28:54 · answer #4 · answered by dand370 3 · 1⤊ 0⤋
I think it happens with most eyes, not just blue! I have blue eyes and what I've noticed is the 'red eye' is worse for us folk simply because we have lighter colored eyes. The back of the retina reflects light for all eyes, but if you have blue, green or Grey eyes, this will be more obvious (because of lighter co lours).
2007-03-13 23:52:01 · answer #5 · answered by Anonymous · 1⤊ 0⤋
If you notice it only happens in a dark space. Because the pupil is dilated in a dark room and the flash reflects off of it. On a sunny day/well-lit room, you will never see this.
Anti-red-eye usually has the flash do multiple flashes before the real one to get the pupil to close in response.
2007-03-13 08:22:10 · answer #6 · answered by Anonymous · 1⤊ 0⤋
it simply happens when the light of the flash is reflected through eye in dark places . in dark places with your eyes trying to get as much light as possible,as more light goes in also more is reflected! that's why they look red.
the best solution is to use anti-red-eye flashes which flash twise whith very little delay for the second one.if that is not available,then the easiest way is that the person doesn't look striaght at the camera lense ,so the reflection of the flash doesn't get to the camera and in the picture the eyes are with their real colour.
2007-03-13 09:06:32 · answer #7 · answered by tara . b 1 · 1⤊ 0⤋
Is tht so? I never knew this. Thx 2 u 4 this info. I ll chk this out nxt time whn I take a pic of some blue-eyed person.
2007-03-13 08:26:45 · answer #8 · answered by Halle 4 · 1⤊ 1⤋
I have had many a photographic red-eye. It's sometimes just the devil coming out to play.
2007-03-14 00:54:12 · answer #9 · answered by I'm Sparticus 4 · 1⤊ 0⤋
NOT ONLY BLUE EYES, ALL EYES PRODUCE RED IF THE FLASH IS TO CLOSE TO THE LENS AND THE AMBIENT IS IN THE DARK SIDE (PENUMBRA).
THE PUPIL IS DILATED AT ITS MAXIMUM, SO THE FLASH REFLECTS INTO THE RETINA (BACK PART OF THE EYE) WITCH IS RED.
THE CAMERA SEES THE RED IN THE BACK PART OF THE EYE.
SOME FLASHES FIRE A FEW FAST SHOTS BEFORE THE BIG ONE TAKES PLACE, FORCING THE RETINA TO CLOSE ELIMINATING IN MUCH PART THE RED.
PROFESSIONAL PHOTOGRAPHERS USE FLASH OFF CAMERA TO AVOID THIS.
2007-03-13 11:48:26 · answer #10 · answered by bigonegrande 6 · 0⤊ 1⤋