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Re: [OM] Red Eyes ????????????

Subject: Re: [OM] Red Eyes ????????????
From: "Mickey Trageser" <mickeytr@xxxxxxxxxxxx>
Date: Wed, 11 Oct 2000 20:56:37 -0400
John,
I fully agree that low light levels are a major contributor to the redeye
problem. But I have to wonder, how does the film speed/flash level play into
this. Given a certain level of darkness and 2 film samples of different ASA,
if the exposure is correct, wouldn't the proportion of reflectance from the
retina to reflectance of the subject's face be the same?  And wouldn't that
net the same image level on the film? Of course, changing the f-stop would
affect the depth of focus, and the shadow depth, but I suspect the redeye
would be constant in intensity.

Just my ponderings....
-Mickey
----- Original Message -----
From: "John A. Lind" <jlind@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Wednesday, October 11, 2000 2:11 PM
Subject: Re: [OM] Red Eyes ????????????


> I'm voting with Mickey.  The first question that came to mind when I read
> the original post was how much ambient light there was.
>
> Also, what speed of film were you using?  If the light level was low and
> you were shooting ISO 100 or 200 film, your flash was probably puting out
> much more output making the risk that much more, and when it does happen,
> it becomes much more noticeable.
>
> -- John
>
> At 21:11 10/11/00 , Mickey wrote:
> >Luc,
> >There are 2 factors to consider, one is the proximity of the flash to the
> >lens. The closer it is, the more directly the light will be reflected
from
> >the subject's retina. If this hasn't changed, you might consider just how
> >dark the room was. Many receptions I've attended are so dark that the
> >people's iris's are wide open and normal flash mounting is too close to
> >avoid the redeye. Often, even in the home, there is far more light to
cause
> >the iris to close down a bit than available in a wedding reception.
> >
> >I know this doesn't help win back your friend, but perhaps it helps
explain
> >how you could suddenly experience redeye.
> >
> >Mickey
> >----- Original Message -----
> >From: "Luc Chartrand" <chartrand_luc@xxxxxxxxxxx>
> >To: <olympus@xxxxxxxxxxxxxxx>
> >Sent: Wednesday, October 11, 2000 3:59 PM
> >Subject: [OM] Red Eyes ????????????
> >
> >
> >> I could believe my eyes, after taking around 10 000 pictures with a
OM10
> >for
> >> 20 years now, I ad never encounter red eyes with my camera.  This
weekend
> >I
> >> was taking picture at friend (ex-friend !) wedding, and all the flash
> >shots
> >> add red eyes, WHY ??????????????????????
> >>
> >> The only thing that add to my camera this weekend was a Cross-filter,
to
> >add
> >> the star effect.
> >>
> >> Please someone tell me the reason...........
> >>
> >>
> >> Luc Chartrand
> >> Hull, Québec, CANADA
> >>
> >> I'l wait for the answer before shooting my self ;(
>
>
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>
>


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