Re: Digital vs Analog

[P3D Peter H. Coffin <hellsop@xxxxxxxxxx>]

At 9:56 PM 12/12/1996, Jim Roberts  <xjim@xxxxxxxxxxxxxxxx> wrote:

--> Regarding digital imaging and stereo photography, it is painfully obvious
> that we are at least two generations away from a consumer priced system that
> can possibly compare to our beloved [fill in favorite stereo camera here].
> I might give up my Realist when we can have a heated discussion about which
> is more accurate: 35mm or digital; a discussion which has good arguments for
> both sides.  Until then, it's 35mm (or larger) for me all the way.

Indeed.  At this point, I've accumulated roughly 60 "keeper" slides, and my
outlay for this has been about $500; for film, camera, mounts, processing,
viewer, everything except my time.

When someone comes up with a digital system that can make its first 60
image pairs of moving subjects for even *twice* that, I'll buy it.

One thing I do not know and would appreciate some information on is whether
all the talk of precise pixilation matters. I know that in film, the color
is separated along the Z-axis. I don't think this is true for current
digital cameras, and I'd be interested to know whether the "pixel count"s
for digital cameras count a triplet of red, green, and blue sensors as one
pixel or three. Does it matter to image quality if the three slightly
offset receptors of photons are then combined into a single pixel, with no
assurance that the colors will be broken out into the same arrangement
again? At least with film, all the colors of the "pixel" are effectivly in
the same spot in relation to orther pixels, but if a (extreme case)

  R   R   R                              G   G   G
 G B G B G B    Array gets changed to   B R B R B R
  R   R   R                              G   G   G
 G B G B G B                            B R B R B R

then an image that registered as

  R   R                  G   G   G
 G   G B G B  becomes     R B R B
  R   R   R              G   G   G
 G B G   G              B R   R   R

which kinda changes the shape of the image.



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