My understanding was that redeye has nothing to do with how close you
are to the subject. Rather how close the flash is to the lens. Let me
explain:
Redeye is caused by the flash reflecting off the retina of the eye. The
flash is reflected at 180 degrees to the angle which it entered the eye.
If the lens is at 180 degrees to the angle the flash light travels then
redeye occurs. Therefore the further the light source is away from the
plane of the lens, the less likely is redeye. By standing further away
from the subject ans using telephoto, you are shallowing the angle
between the flash and the lens. Therefore you are MORE likely to get
redeye by being further from your subject.
Yes a flash bracket would help because it would move the flash further
off axis or further from the lens.
Rob Brigham
-----Original Message-----
From: Ayash Kanto Mukherjee [mailto:[EMAIL PROTECTED]]
Sent: 23 May 2001 11:43
To: [EMAIL PROTECTED]
Subject: Red Eye effect<->Telephoto lens!
Hi all!
Recently, I was taking some shots in a function (The organizers of the
function requested me to photograph the activities in the function). In
the question hour session, I was photographing a young boy who was
asking
question. He was about 8 meters away from me and I was using PENTAX SMC
F 100-300mm f/4.5-5.6 at 250 mm focal length. He was not looking at the
camera and was unaware of being photographed. When I got back the
prints, I was surprised to see red eye effect on the eye of the
boy. The flash used was VIVITAR 2800 at red mode (if the subject to
camera
distance (s) is, 6 m > s > 12 m, the flash should be operated at red
mode,
according to the manual). I can not understand how this could happen at
a
distance of 8 meters. Yes, it is true that operating at a focal length
of
250 mm takes you near to the boy but red eye effect happens when the
subject is looking towards the lens and flash is fired from a close
distance say about 3 - 4 m. May be a flash bracket can help me to get
rid
of the problem.
Any comments/explaination is appreciated.
Cheers,
Ayash Kanto.
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