>Exposure is being determined with the lens wide open. The
>dimming properties of the stock screen is probably more linear
>than the Katzeye.
>AG
Yup; from the Katzeye site:
--------------------------
Katz Eye(tm) Focusing Screen for the Olympus E-1
General and Metering Information
snip>The split prism with microprism ring is a great combination for focusing
in a variety of situations and it has only a minimal effect on metering with
the E-1. In ESP or centerweighted modes, it showed no effect on the meter with
lenses f2.8 or better. Lenses with a maximum aperture of f3.5 or slower may
show metering shifts of 1/2 to 1 f-stops toward over-exposure in these modes.
In the spot metering mode, there will be no effect under most conditions, with
a maximum change measured of 1/3 f-stops toward over-exposure.<snip
---------------------------
Tom
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