Archived posting to the Leica Users Group, 2000/08/24

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Subject: Re: [Leica] Grey card
From: Mark Rabiner <mark@rabiner.cncoffice.com>
Date: Thu, 24 Aug 2000 02:25:05 -0700
References: <000201c00d3b$5b010940$bb2340c3@pbncomputer> <009d01c00da5$6a279dc0$650a0a0a@slamb>
 
Simon Lamb wrote:
> 
> Whuy does someone not just "invent" a grey card with 13% reflectance?
> 
> Simon
><Snip> 

I recall grey cards with a WHITE flip side.
I think they said to use the white side in dark situations and open up 4 stops
from your reading.
But whites might be more hard to regulate than a grey shade. Some manufactures
would have titanium dioxide in theirs and it would be whiter than white.
Markwr
If it's night, use the white, must be right!
Replies: Reply from Shel Belinkoff <belinkoff@earthlink.net> (Re: [Leica] Grey card)
 In reply to: Message from "Erwin Puts" <imxputs@knoware.nl> ([Leica] Grey card)
Message from "Simon Lamb" <simon@sclamb.com> (Re: [Leica] Grey card)