Xref: utzoo comp.sys.ibm.pc:25602 rec.photo:4830
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ulowell!cg-atla!jmacdon
From: jmacdon@cg-atla.UUCP (Jeff MacDonald)
Newsgroups: comp.sys.ibm.pc,rec.photo
Subject: Re: Photographing PC Screens
Message-ID: <6743@cg-atla.UUCP>
Date: 3 Mar 89 16:01:39 GMT
References: <3779@peora.ccur.com> <3939@kuhub.cc.ukans.edu> <7454@pyr.gatech.EDU>
Reply-To: jmacdon@cg-atla.UUCP (Jeff MacDonald)
Distribution: na
Organization: Agfa Compugraphic Division
Lines: 17

In article <7454@pyr.gatech.EDU> curci@stat.fsu.edu (Ray Curci (scri)) writes:
>                                                ...  Use the video screen
>as your light source (no flash), and when you measure the light do it
>from the camera's location because of the inverse square law will give you
>misleading readings especially at close range.

This is not quite true.  The inverse square law is not what causes
the problem.  When working close up there is loss of light to the
film due to lens extension.  If you don't change the focus from
where it will be when you fire the shutter you can take close-up
readings with no problem.  Of course, it DOES get very hard to see
what you're taking a reading of sometimes... but, what the hay.
-- 
Jeff MacDonald ([decvax|ulowell]!cg-atla!jmacdon)
Agfa/Compugraphic Division  200-2-9F
200 Ballardvale, Wilmington MA 01887
(508) 658-0200,  extension 5406