At 07:32 AM 3/14/2003 +0000, you wrote:
Not sure if you will be using the OM spot meter or a handheld Joel.
OM spot meter.
If the
latter, you are correct. If the former, then you really need a circular
polarizer with an OM-4, otherwise you can't be sure whether the spot meter
has already made the correction or not, due to the semi-silvered mirror in
the (2SP, 3 and) 4 which conflicts with a linear polarizer.
I don't have a circ polarizer in 77mm. So I am looking for a work-around
that enables me to use the OM-4 spot metering system and use the linear
polarizer.
You get the
same effect with the viewfinder display using averaging metering but actual
exposure is unaffected. With spot metering, the exposure is affected. Or
are you proposing to meter without the polarizer, then adjust? That would
work.
Piers
Yes, 1) meter without polarizer, then 2) put PL on lens, and 3) adjust
exposure compensation dial 1 and 1/3 stops. I guess steps 2 and 3 could be
reversed.
Joel W.
-----Original Message-----
From: owner-olympus@xxxxxxxxxxxxxxx [mailto:owner-olympus@xxxxxxxxxxxxxxx]
On Behalf Of Joel Wilcox
Sent: Friday, March 14, 2003 4:30 AM
To: olympus@xxxxxxxxxxxxxxx
Subject: [OM] Reviewing the Basics of PL's with OM-4
I'm going to be using a 77mm linear polarizer soon, likely with an OM-4
most of the time. Since I prefer to do multispot averaging, I believe that
I am going to need to meter the scene and then open up by the appropriate
filter factor for a polarizer, which is about 1 and 1/3 stops.
I have decided that if the multispot exposure setting matches the
center-weighted setting, I'll just put the filter on the lens and shoot in
straight auto mode. If the multispot setting is different, I'll probably
go with it and record the setting to memory, put the PL on the lens, and
dial in 1 and 1/3 stops of + exposure compensation.
Comments or suggestions?
Joel W.
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