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From: stimac@tymix.UUCP (Michael Stimac)
Newsgroups: net.rec.photo
Subject: calculating exposure time during exposure
Message-ID: <684@tymix.UUCP>
Date: Fri, 7-Mar-86 18:11:38 EST
Article-I.D.: tymix.684
Posted: Fri Mar  7 18:11:38 1986
Date-Received: Sun, 9-Mar-86 05:09:19 EST
Distribution: na
Organization: Tymnet Inc., Cupertino CA
Lines: 15

Regarding reading the light off the film DURING the exposure, as opposed
to precalculating the exposure time, I think the following is true.

Minolta was the first to do this. They licensed other camera makers
to use their technology (Olympus?) before actually offering this
feature on their own brand-name cameras. 

Presently, Minolta offers several models which have this feature.
I think it works by measuring the light reflected from the film
while the shutter is open. At least some of the other camera
manufacturers offering this feature presently are using Minolta's
technology, under royalty.

Michael Stimac
...hplabs!oliveb!tymix!stimac