[Leica] Gray card not 18% Erwin

[tim at KairosPhoto.com (Timothy Atherton)]

Or there is this.

As I recall, the standard used for light meters works out at something like
12.5 or 13% grey - or something like that....

"the 18% thing is a photographic urban legend, nothing more. No light meter
was ever factory calibrated to 18% reflectance. Meter makers use the ANSI
Standard which works out to about 12.5%, or 1/2 stop less reflectance than
18%.
The Kodak Gray Card, 1999 revision, contains correct instructions for its
use. I know because I wrote those instructions after being hired by Kodak,
and did considerable research on the subject.
You can read more in the book I co-authored, The Hand Exposure Meter Book."
Bob Shell, former editor of Shutterbug Magazine

(go down to meters and colour balance:)
http://www.kinesisgear.com/opinion.html

> -----Original Message-----
> From: lug-bounces+tim=kairosphoto.com@leica-users.org
> [mailto:lug-bounces+tim=kairosphoto.com@leica-users.org]On Behalf Of
> animal
> Sent: June 10, 2005 10:39 AM
> To: Leica Users Group
> Subject: Re: [Leica] Gray card not 18% Erwin
>
>
> http://www.imx.nl/photosite/technical/exposuremeter.html
> best regards
> simon jessurun
> amsterdam
>
> ----- Original Message -----
> From: "Mark Rabiner" <mark@rabinergroup.com>
> To: <lug@leica-users.org>
> Sent: Friday, June 10, 2005 6:25 PM
> Subject: [Leica] Gray card not 18% Erwin
>
>
> > Over the years one of the more interesting things I've learned
> on the LUG
> > was that the gray card is not real middle gray. It's off a few
> degress for
> > some reason from 18%. Or that 18% should be 19%.
> > Erwin had the skinny on it but I can't find it on his website.
> >
> > Anybody know where to find that stuff or care tell me what it is?
> >
> > I find it fascinating that one of the starting points, the givens, of
> > photography is really not really on the money.
> > It's always something! :)
> >
> > But I want to know what it is I'm all organized with my notes and
> > everything
> > now.
> >
> >
> > Mark Rabiner
> > Photography
> > Portland Oregon
> > http://rabinergroup.com/
> >
> >
> >
> >
> >
> > _______________________________________________
> > Leica Users Group.
> > See http://leica-users.org/mailman/listinfo/lug for more information
>
>
> _______________________________________________
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