I have read all the posts in these two threads and I have found it
frequently entertaining and more than occasionally educational. I
am continually amazed at the collective enthusiasm, intelligence
and knowledge of the DP Review forum communities.
In these two threads, it is often difficult to separate fact from
well conceived fiction. I am certainly no expert on the underlying
technical issue, but I do pride myself as a fair analyst of
argument and a logical thinker. From my perspective, it seems that
it is all coming down to semantics. (It seems many arguments do.)
Jim's main assertion is that a 3 mp sensor can't produce more than
3 mp of information. This is a hard argument to deny. In fact I
would guess that this statement really isn't as strong as it could
be. I would guess that it would be true, given the fallibility of
all things human, that a 3 mp sensor can produce no
more than 3
mp of information. Good information anyway. The reality is that
information is unavoidably lost or distorted at several stages of
the picture taking process - info is lost/distorted as light is
transmitted to the lens from the object being captured, the lens
itself loses/distorts information, the photosensor loses/distorts
information, the never perfect processing algorithms lose/distort
information, etc. In the end, you end up with something less than
what you were trying to capture with your camera. Although we can
minimize the loss and distortion, it's always there to some degree,
and it will never completely go away.
So I think in reality what the problem reduces to, is how accurate
is each camera? That is, how little error did the camera introduce
to the process? The best camera is the one that screws things up
the least! The flaw in most of the arguments here, imho, is that
people are trying to state how a given camera (the 602/6900)
increases the information over another camera, when I think what
they really mean is that it
loses_less information than a
comparable 3mp camera. Is it possible that a 4mp camera produces
less
good information than a well-engineered 3mp camera. Of
course it's possible. This assertion is as difficult to deny as
Jim's assertion.
I think viewed from this perspective, the arguments here fall
mostly into alignment. Everyone seems to agree that the Fuji
camera does a pretty nice job and better than most 3mp cameras.
But ultimately, it all comes down to each person's subjective
assessment to determine which camera is the best.
I hope this makes sense to someone. It does to me, but then it's
very late.
Thanks for all the informative posts.