This has been very interesting, but I may have mislead a bit with the title.
I'll try to clarify: I have 2 linear polarizers in 49 that I'd like to use
in tandem for density in a fixed flash environment. I had one response from
Moose that suggested some strange colors may result. That may be ok in my
application.
I plan on using a flash meter rather than the auto TTL camera feature. So I
need to know what the actual density will be with one and both filters in
place, in terms of 'stops'. That's so I can determine how far to deviate
from the flash meter reading. That is, if the flash meter reading is f22,
how many stops to I open up to accommodate the density?
Can I approximate the difference by taking a regular ambient reading with
the camera, and then comparing the reading with the filters in place?
Also, I understand that the linear polarizer is fine for average camera
meter readings, but for spot readings it will be off because of the way the
spot meter works. I'm refering to both the OM 4T and the OM 2S.
Thanks for all the lively discussion!
-Mickey
----- Original Message -----
From: "Scott Gomez" <scott@xxxxxxxxxxxxxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Tuesday, May 28, 2002 2:13 AM
Subject: RE: [OM] Help! Light theory, cp-l
> Ok... those reasons make sense. Thanks, Moose. I'll be seeing whether it
> makes a big difference later this week as a result of some practical use.
>
> I only have a linear polarizer in 72mm and was shooting with the OM-4T, my
> 300/4.5 and the PL-L all afternoon today. That said, with ISO100 film, the
> average exposure time was around 1/30th second... so I'll only have valid
> results for slow speeds.
>
> Potential TOPE 10 shots, and on slide film, so I sure hope some work...
>
> Guess I had better save my pennies for a PL-C in each size (49, 55 and 72)
> also. The 72mm ones are WAY expensive.
>
> ---
> Scott Gomez
>
> -----Original Message-----
> From: dreammoose [mailto:dreammoose@xxxxxxxxx]
> Subject: Re: [OM] Help! Light theory, cp-l
>
> Here I go again.......
>
> Not really, at least in some cases.
>
> For any manual reading on the OM-2s, Om-3(T) and OM-4(T), the reading
> through the half-silvered mirror determines the shutter speed indicated
> in the viewfinder.
> For spot readings on the OM-4, the spot reading in memory, which was
> made through the half-silvered mirror, determines the shutter speed;
> there is no OTF reading at all.
>
> <snip>
>
> Moose
>
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