Digital BW, The Print

That's interesting considering on their web page:

http://www.kodak.com/global/en/professional/products/storage/pcdMaster/about
PCD.shtml

Kodak claims that a 2048 x 3072 (or 6 megapixel) image captures, "all the
image data 35mm film has to offer."

Rather than comparing grain size to resolution, I think an interesting
comparison would be between the film's resolving power and the digital
resolution.  The data sheet for Fuji Velvia, for instance, says it can
resolve 80 lines/mm at a chart contrast of 1.6:1.  The measurement for this
is described in ISO 6328:2000.  Does anyone have a copy of this?  What I
don't know is if lines/mm means lp/mm.

If you assume it means exactly what it says, "lines/mm," then that
translates to 4064 pixels per inch which would mean an image of 3840 x 5760
(or 22.1 megapixels) is equivalent.  This is closer to the number thrown out
by Gordon Brown.

The only problem is if those lines are at an angle, rather than perfectly
horizontal or vertical, you'll need more resolution yet.  I think the magic
number lies somewhere between 20M and 100M pixels.

--Tom



----- Original Message -----
From: "mkravit" <michael.kravit@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Monday, January 28, 2002 8:12 PM
Subject: [Digital BW] From the horses mouth.


> This past weekend I had the opportunity to attend a panel discussion
> on digital photography. When asked how the resolution of 35mm film
> compares to digital, Gordon Brown of Kodak/RIT fame stated that Kodak
> Kodacolor 35mm film has the equivalent of 20 megapixels of resolution.
>
> It seems that the 100 megapixel number that was discussed here a few
> weeks ago just is not accurate.
>
> Not that it matters ;-)
>
> Mike
>