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Photography Question 
Dan Schlochtermeier

Red Eye - Cause and Prevention

I quickly grabbed my D200 and my SB-600 flash for my childrens Christmas choir preformance. Not having time to put the flash bracket on, I just put the flash on the hot shoe. Got lots of good pictures but now I have to correct every shot because of red eye. If I had put the flash on the flash bracket, would I have eliminated the red eye?

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12/30/2006 6:45:05 AM

Raymond H. Kemp
BetterPhoto Member Since: 4/2/2004
  Iím assuming that your flash bracket allows you to mount the flash off the axis of the camera lens - say, just to the left? Yes, getting the flash off the axis of the camera lens is the best way to foil red eye. Interesting, though, I too use the D200 but with the SB-800. Even mounted on the shoe, Iíve never encountered a red eye problem.

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12/30/2006 6:54:29 AM

Bob Fately   Moving the flash a few inches further away from the lens axis could indeed help with this problem, Dan, since red-eye is the reflection of the flash light off the retina of the subject. The further from the lens, the wider the angle of reflection becomes, such that eventually the light reflecting off the retinas doesn't find its way back into the lens.
Your distance from the subject also impacts this factor - when you're close, a couple of inches may be enough, but from a greater distance you would need to move the flash further from the lens to get the same effect (it's just geometry). So while it couldn't hurt to have used a bracket in any event, it is possible that a bracket would not have helped so much given how far you were from the kids. That's when you get someone next to you to hold the flash and point it forward - effectively becoming your human bracket holding the SB600 a distance of 3 feet rather than 6 inches.

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12/30/2006 6:59:34 AM

Terry  R. Hatfield
BetterPhoto Member Since: 1/4/2003
  If Your Flash Has A Modeling Feature Use It, Pupils Dilate In Low Light To Take In More Light. This Will Contract The Pupil Thus Eliminating The Cause. Flash Brackets Help Too. Like Raymond I Use Nikon Flashes And Haven't Encountered Problems With Red Eye (Unless It Was An On Camera Flash).

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12/31/2006 6:28:19 AM

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