Polaslide film cannot be used for OTF metering because of its extremely high
reflectivity.
end
Regards
Bruce Appelbaum
Yorktown Heights, New York
----- Original Message -----
From: "Dan Lau" <dlau@xxxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Monday, October 16, 2000 12:12 PM
Subject: [OM] Difference in film reflectance
> I am wondering if there is any difference in the amount
> of light reflected in exposed film vs. un-exposed film.
> For example, when testing one of the OTF models (OM2 to
> OM4(T(i))), does it matter what type of film is put in
> the film chamber during the test. In my thinking, there
> are (at least) the following possibilities:
> Un-exposed film [a fresh roll every time, expensive]
> Exposed (but un-processed) film [if I use the same
> roll of film to test several bodies, this is what
> I'll end up with]
> Processed un-exposed film [this is just clear film]
> Processed exposed film [in this case, does it matter
> what is on the film?]
>
> So does it matter which type of film I use to check out
> the OTF meter accuracy of an unknown body? Thanks.
>
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