Gerard,
I'm pretty confident, that it must be the subject. Reciprocity failure is
not the case. (exposures 1/10 or shorter)
The guy at the lab told me that I should compensate -- went to kenko site,
and I saw the factors. I was puzzled and posted a question here. Now I'm not
so puzzled anymore :)) thanks to you. But I will try this again soon. (I
shot some plastic filter boxes, positioned on the polarizer with a polarizer
on the lens all together on the light box (you see great colours), and those
images are darker than what I would have hoped for. And I think the metering
should not have been a problem there, but on the other pictures, it could be
the case. Anyway, will try again. :)
rgds,
ivi.
> -----Original Message-----
> Indeed the EOS 30 has the same pattern than the 300 (I don't know
> about the
> metering algorithms, though).
>
> If you have some 1/2 under and some 1.1/2 underexp. it seems to me like
> subject bias rather than bad metering. I used once a friend's
> EOS300 with the
> 25mm extension and I had no problem at all.
>
> I've used extensions with the 50/1.8, 28-135IS, 75-300IS and 100/f2.8 (new
> version). I've seen no dramatic exposure problems. Most of the times *my*
> exposure problem is the subject itself (as I still think it can
> be yours). What
> was your subject?
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