> Hi Emil,
> thank you very much for your explanation. I will try the test you
> suggested straight this evening. Your notice about the low center
> weighing of the average-mode covers exactly my suggestions (and explains
> to me the tendency to underexposer in average-mode which my OM 4 Ti
> showes in cases of high contrast with even small but bright zones at the
> edges of the image; but that is of course not a problem).
> There is one thing which keeps me still wondering:
> At the moment (it is early morning here in Germany and I did not have my
> usual tea yet :-); and my brain is pretty much the contrary of a
> scientifically trained one...) I find your explanation absolutely logic
> in the case that spot-mode gave HIGHER values (indicating shorter speed)
> for measuring an area with no lens-caused fall-off. An average
> measurement including seemingly "darker" zones because of lens-caused
> fall-off should indicate indeed a less average light-value. But I get
> instead indications for lower speed, means less light at spot...
This is IMO, not allowable. Which lens you are refering to? Can you
compare the readings to a good lightmeter and see which one is (more)
correct?
--
Regards,
Emil Pozar
epozar@xxxxxxxxx
http://mypage.at/emilpozar
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