Canon EOS 1Ds MkII Preview

Georgette Preddy wrote:

That's monochrome dpi. Interpolating color from monochrome photosites
lowers effective dpi by roughly 400%.

BWAAAHHHAHAHAHAHAAHAH... I guess now that Sigma are really dying on the vine, we
can expect to hear less from you.

--
-- rec.photo.equipment.35mm user resource:
-- http://www.aliasimages.com/rpe35mmur.htm
-- e-meil: there's no such thing as a FreeLunch.--

Bryan Olson wrote:

Dude, I didn't attack your credibility. I didn't tell you what
to do with your time. I'm not about that. I just have this
technical point, which I believe is correct: If you enlarge, but
then shrink to smaller than the original, the net result is
useless for demonstrating the quality of the enlargement
process.


IN the real world this it right but where the Internet is concerned, A
compromise between monster downloads and convience has to be made. I
took a photograph of the print at as close to 1 : 1 as I could guess and
resized the picture to what Photoshop said was something less than a
30 second dounload at 28k dialup speed.

If that aint what *you* want, go do it yourself and post the results.

Ryadia

Bryan Olson wrote:

Dude, I didn't attack your credibility. I didn't tell you what
to do with your time. I'm not about that. I just have this
technical point, which I believe is correct: If you enlarge, but
then shrink to smaller than the original, the net result is
useless for demonstrating the quality of the enlargement
process.


IN the real world this it right but where the Internet is concerned, A
compromise between monster downloads and convience has to be made. I
took a photograph of the print at as close to 1 : 1 as I could guess and
resized the picture to what Photoshop said was something less than a
30 second dounload at 28k dialup speed.

If that aint what *you* want, go do it yourself and post the results.

Ryadia

"David Littlewood" wrote in message
...
In article , Georgette
Preddy writes
Alan Browne wrote in message
et...
Deryck Lant wrote:

http://www.dpreview.com/articles/canoneos1dsmkii/

This is starting to edge into MF digital capabilities... with a
camera system that is lower cost than a back... definitely more
than enough for the most demanding magazines and probably more
than enough for high quality book printing.

The images at the Canon site are very detailed and clean.

potential print o/p (inches)

dpi: 300 250 200 150 133 72

That's monochrome dpi. Interpolating color from monochrome photosites
lowers effective dpi by roughly 400%.

Hot news, "Georgette": your eye has approximately 1 billion rods (which
give a purely B&W image) and about 3 million cones (about 1 million each
of red, green and blue sensitive). By your reckoning, I guess you must see
mostly in B&W. For everyone else, the brain post-processes the image
information to give the full colour image we "see".
--
David Littlewood

"David Littlewood" wrote in message
...
In article , Georgette
Preddy writes
Alan Browne wrote in message
et...
Deryck Lant wrote:

http://www.dpreview.com/articles/canoneos1dsmkii/

This is starting to edge into MF digital capabilities... with a
camera system that is lower cost than a back... definitely more
than enough for the most demanding magazines and probably more
than enough for high quality book printing.

The images at the Canon site are very detailed and clean.

potential print o/p (inches)

dpi: 300 250 200 150 133 72

That's monochrome dpi. Interpolating color from monochrome photosites
lowers effective dpi by roughly 400%.

Hot news, "Georgette": your eye has approximately 1 billion rods (which
give a purely B&W image) and about 3 million cones (about 1 million each
of red, green and blue sensitive). By your reckoning, I guess you must see
mostly in B&W. For everyone else, the brain post-processes the image
information to give the full colour image we "see".
--
David Littlewood

David Littlewood" wrote in message

Hot news, "Georgette": your eye has approximately 1 billion rods (which
give a purely B&W image) and about 3 million cones (about 1 million each
of red, green and blue sensitive). By your reckoning, I guess you must see
mostly in B&W. For everyone else, the brain post-processes the image
information to give the full colour image we "see".

You are unintentionally confusing the subject. What does the above have to
do with the metrics of 'resolution' of digital sensors? And, btw, the eye
is not an RGB machine: there are no cones sensitive to red. Far yellow is
the best the cone's pigment can do. The 'red' is made up of mixing signals
in the subretina. That's one of the reasons the human eye is confused, and
for the existence of nonspectral colors.

David Littlewood" wrote in message

Hot news, "Georgette": your eye has approximately 1 billion rods (which
give a purely B&W image) and about 3 million cones (about 1 million each
of red, green and blue sensitive). By your reckoning, I guess you must see
mostly in B&W. For everyone else, the brain post-processes the image
information to give the full colour image we "see".

You are unintentionally confusing the subject. What does the above have to
do with the metrics of 'resolution' of digital sensors? And, btw, the eye
is not an RGB machine: there are no cones sensitive to red. Far yellow is
the best the cone's pigment can do. The 'red' is made up of mixing signals
in the subretina. That's one of the reasons the human eye is confused, and
for the existence of nonspectral colors.

In article , jjs
writes
David Littlewood" wrote in message

Hot news, "Georgette": your eye has approximately 1 billion rods (which
give a purely B&W image) and about 3 million cones (about 1 million each
of red, green and blue sensitive). By your reckoning, I guess you must see
mostly in B&W. For everyone else, the brain post-processes the image
information to give the full colour image we "see".

You are unintentionally confusing the subject. What does the above have to
do with the metrics of 'resolution' of digital sensors?

The fact that an apparently low resolution of colour can still lead to
good perceived colour imaging.

And, btw, the eye
is not an RGB machine: there are no cones sensitive to red. Far yellow is
the best the cone's pigment can do. The 'red' is made up of mixing signals
in the subretina. That's one of the reasons the human eye is confused, and
for the existence of nonspectral colors.

This is not the understanding I have gained from books I have read;
however, I can claim no great expertise in the subject, so you may be
right - books sometimes simplify the story! What you say does though
raise the question of how the eye manages to detect red light in the
first place - which it certainly does.
--
David Littlewood

In article , jjs
writes
David Littlewood" wrote in message

Hot news, "Georgette": your eye has approximately 1 billion rods (which
give a purely B&W image) and about 3 million cones (about 1 million each
of red, green and blue sensitive). By your reckoning, I guess you must see
mostly in B&W. For everyone else, the brain post-processes the image
information to give the full colour image we "see".

You are unintentionally confusing the subject. What does the above have to
do with the metrics of 'resolution' of digital sensors?

The fact that an apparently low resolution of colour can still lead to
good perceived colour imaging.

And, btw, the eye
is not an RGB machine: there are no cones sensitive to red. Far yellow is
the best the cone's pigment can do. The 'red' is made up of mixing signals
in the subretina. That's one of the reasons the human eye is confused, and
for the existence of nonspectral colors.

This is not the understanding I have gained from books I have read;
however, I can claim no great expertise in the subject, so you may be
right - books sometimes simplify the story! What you say does though
raise the question of how the eye manages to detect red light in the
first place - which it certainly does.
--
David Littlewood

In article , says...
You are unintentionally confusing the subject. What does the above have to
do with the metrics of 'resolution' of digital sensors?

Nature found the simplest way to color vision. Our vision puts a high
priority on luminance, not color. Thus, a sensor that records accurate
luminance over a larger spatial area (even at the expense of color
accuracy) will produce the most detail images.
--
http://www.pbase.com/bcbaird/