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Path: utzoo!watmath!watdcsu!herbie
From: herbie@watdcsu.UUCP (Herb Chong, Computing Services)
Newsgroups: net.rec.photo
Subject: Re: Re: Exposure meters
Message-ID: <621@watdcsu.UUCP>
Date: Wed, 7-Nov-84 11:21:52 EST
Article-I.D.: watdcsu.621
Posted: Wed Nov  7 11:21:52 1984
Date-Received: Fri, 9-Nov-84 04:32:30 EST
References: <1882@pegasus.UUCP> <612@watdcsu.UUCP>, <489@aluxe.UUCP>
Organization: U of Waterloo, Ontario
Lines: 30

Unless you've got a weird camera, I don't see how using its builtin
exposure meter is going to cause wear on the camera other than battery
life.  As for shadow detail, if you're not willing to move your camera
to check it, then a separate meter is required.  For most people, this
convenience is not worth the cost of the meter.  As for measuring incident
light, most people don't know how to read it properly anyway.  One could
buy a Sekonic Auto-Lumi L-158, which costs $20 CAN, but requires recalibration
every year or two and is not very sensitive, not to mention slow in response.
CdS light meters have a memory effect when exposed to bright light for
any length of time.  Silicon cells are sensitive to infrared and must be
properly filtered.  Compensating for these problems costs money.  GaAs cells
are expensive period.  The other point is that purchase of a light meter
is to either check exposure compared to the builtin meter or to extend
beyond the limitations of the camera's meter.  Almost any exposure meter
will satisfy the first, with the possible exception of a selenium cell meter,
while it takes more to be the second.  The EV range must be higher than
the camera's meter, measure incident and reflected light quickly and efficiently
without a lot of accessories, and be accurate.  Whatever exposure meter is
purchased, a Kodak Grey Card and the knowledge of how to use it properly is
strongly recommended.

Herb Chong...

I'm user-friendly -- I don't byte, I nybble....

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