During repair training for the OM-4, our trainer mentioned that it was
normal for there to be a discrepancy between the spot and average meter
readings with wide angle lenses due to the "optical characteristics" of
those lenses. He refused to elaborate (which means he probably didn't
know!), but we speculated that it might have to do with the angle of the
reflecting surfaces of the sub-mirror.
> During my last travel to Greece, I used my Sigma 16mm fisheye quite a lot.
> It's an amazingly good lens, IMHO.
> One thing I noticed that if I used spot metering on the OM-4ti, my slides
> came out overexposed. Could it be that the combination of the fisheye and
> the semi-transparent mirror fools the spot meter ? Makes me think of using
> a linear polariser with one of the semi-transparent mirror OMs.
> Spot metering with other lenses works perfectly well as expected.
> Any clues ? Any experiences ?
>
> -----------------------------------------------------------------
> Wim Verheyen, Houthalen, Belgium, aemit@xxxxxxxxx
> Photography and synthesizers
> http://users.skynet.be/aemit/
> -----------------------------------------------------------------
>
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