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
]]
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
Ayash,
You understand that red-eye because you show the illumination of the red
blood vessels at the rear of the eyeball in your photo. You can do this at
any distance if your flash and lens are close enough. It is actually easier
to get/have red-eye with long lenses because the effective an
On 23 May 2001, at 9:38, [EMAIL PROTECTED] wrote:
> Ayash,
>
> You understand that red-eye because you show the illumination of the red
> blood vessels at the rear of the eyeball in your photo.
Which leads me to the question; do cats eyes have green blood vessels?
Cheers,
Rob Studdert
HURS
Hi Bob ...
I'm glad that you're not my doctor!
Your post is partially correct. Our blood is red. The blood that
flows in the veins id a darker red because the oxygen in the cells
has been exhausted, i.e., it's used blood. The blood in arteries is
a bright red, as it's freshly oxygenated.
You
Shel Belinkoff wrote:
>
You are correct about the retina cells (cones, specifically, I
> think) that cause the red eye effect (in humans) the green color in
> some cats, and yellow in other cats and mammals.
Red in the case of Siamese cats (and, I suspect, other blue-eyed cats)
--
John Franci
That would seem to be correct. My white calico, blue-eyed cat can get a
wicked case of red-eye.
- Original Message -
From: "John Francis" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, May 23, 2001 7:16 PM
Subject: Re: Red Eye effect<->Teleph
On Wed, 23 May 2001, Gerald Cermak wrote:
> But cat's eyes are different than humans, in that they also reflect
> surrounding light, some of comes back out in a focused beam (tapetum
> lucidum). See
> http://www.madsci.org/posts/archives/may97/863469939.Zo.r.html
>
> Cheers,
> Gerald
>
Hi Gera
Hmm. Maybe it's unusual that my cat gets red-eye. Is it also unusual for
cats to speak, levitate and turn their heads 360 degrees? Maybe I should
stop eating those mushrooms I find in the woods ...
>
> My cat is green eyed, and gets wicked cases of "green-eye effect" when
she's
> posing directly
Those sound like especially good mushrooms where did you say you found them?
At 12:42 AM 5/24/2001 -0500, you wrote:
>Hmm. Maybe it's unusual that my cat gets red-eye. Is it also unusual for
>cats to speak, levitate and turn their heads 360 degrees? Maybe I should
>stop eating those mushrooms I f
The red eye is caused by the angle off the lens axis of the
flash. At 1 meter the shoe mount flash is maybe 15 degrees
off the axis, at 8 meters it is only one ot two degrees off
axis. Very much the same as using the RTF at closer
distances. In fact at longe distances you can even get red
eye with
Hi Tom!
Many thanks for the explaination.
With regards,
Ayash Kanto.
On Thu, 24 May 2001, Tom Rittenhouse wrote:
> The red eye is caused by the angle off the lens axis of the
> flash. At 1 meter the shoe mount flash is maybe 15 degrees
> off the axis, at 8 meters it is only one ot two degrees
Hi,
I'm no doctor (trust me), but isn't it the case that mammalian blood is
not red but blue when it's in the veins? It only turns red when it
oxidises (eg when it comes out of your veins). This would suggest that
red-eye is not a reflection off blood vessels, but off the retina
itself, which is
Hi,
> By the way, I have observed a
> burning yellow light coming out of the eye of a tiger (I was enjoying a
> feature in "Animal Planet" in TV)
the cameraman should get in touch with William Blake. They're the most difficult
kind of tiger to photograph. Framing is extremely difficult because o
Hi,
Human blood is red. Tending towards scarlet when it has oxygen
attached, tending towards crimson when deoxygenated. It is this
redness of the general tissue which gives red eye.
The reason most cats (try photographing Siameses) give green eye
is that they have an additional layer (the tape
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