Yes, I realize how much smaller the pixels are, and I fight every
day to correct the problems caused by these small pixels. The
noise is so bad that every camera has to either run a noise
reduction program in the camera, or in the software. The
cameras that don't do this, even with very good glass, get
knocked for the noise in the images. Download Neat Image,
create a signature file, and then run a directory of files. When
you get done, tell me how well those little sensors are doing.
Build a contact lens that you can do a portrait shot of a Sparrow
at 25 feet with. Then tell me what they cost. Your examples
don't hold water. The G2 is so much better than it's
competition because it did not go to the 5mp chip, and
instead stayed with the 4mp Sony chip. The 707 applies so
much smoothing that landscapes often look like good
watercolor paintings. The D7 works very well, but needs
noise reduction to reach it's best output, but at least it doesn't
run hard smoothing in the camera. I have not seriously looked
at the 5000, as the lens and the various reviews convinced
me. The simple fact is that photosites on the D60 are smaller
than those on the D30, but they are in no way comparible to
the consumer sensors in size, output, noise levels, or any other
comparison you wish to make. The simple facts are that smaller
lenses to make a camera flexible enough for serious use are
more expensive to make than the larger versions. I can grind
you a 6 inch telescope lens by hand that will be pretty good. It
will not be perfect, but with coatings added, it will work very
well. I can not make the same lens at 2 inches with my gear.
Why? Because at 2 inches, evey defect is magnified many times
over. Lets don't even discuss a 1/2 inch lens. Now, the
top of the line new tech appears to be a three layer mask with
9 circuits in each well. If we follow your road, we abandon
tech that can and has already shown images several times better
than any CCD image comprised of the same number of
photosites. You can't have it both ways, at least not today.
Either you have small noisy imagers with limited dynamic range
and very small windows of useful amplification, or you can have
larger chips with less noise, more dynamic range, and greater
possibilities for signal amplification before it is degraded. There
may come a time when you can have a 1/2 inch chip that will
have 10mp resolution, and a usable ISO range to 1600, but
we are not even close yet. My own speculation is that we will
see a full frame CMOS chip spec'ed and sampled in less than
18 months. Hopefully, it will be a Foveon chip. Then you
will find out just how demanding on glass these imagers really
are, once they start using the edges of the lenses.
What I can see as the current trend is that they are making the
pixels smaller (D60, D100, D1x) with less or comparable noise.
As far as the optics: just look at the G2 and f707 - did you
realize how much smaller the sensor pixels are - and the lenses are
still capable of providing good resolution? Then you must have
realized that the a major drawback of today's 35mm SLR bodies is
that they cant put lenses closer to the sensors (due to bulky
mirrors and shutter mechanism and old design in general). Just to
make you understand how important sensor to lens distance for
overall resolution is let me mention some more examples (other than
g2 and f707) contact lenses (cheap but with incredible resolution)
or lets say cataract lenses are very similar.
So the new SLR design would make several advances: smaller sensors
(20mm would be fine), smaller lenses, and optics placed much closer
to sensor. The overall design would be MUCH more costeffective and
IMO the only way to go eventually.