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Hell, that was my question. It is pretty clear that using the Nikon system, the positional integrity of a pixel is preserved because the scan head doesn't move as the color illumination is changed. Now does a color mask CCD scanner use interpolation algorithms to predict the proper color for each pixel based on the neighboring pixels which of course have a different color mask. Or is the CDD moved in a manner where for each position on the original, it is scanned with a R, then B, then G CCD element. Note that one parameter of a CCD is the element to element matching This is what causes noise when you scan a uniform (intensity and color) target. The other parameter is the "dark current", which is effectively the intensity of the CCD element with no light source. The scanner firmware is supposed to remove this error source. If the scanner moves the CCD to place a differently "masked" CCD element, does this CCD to CCD element matching come into play. My assumptions of the masked CCD design can be flawed as well. For instance, the CCD used in a camera has alternating RGB. [I've heard some use more of one color than another for some technical reason.] Maybe a film scanner has a 3 line by whatever wide CCD, with each line being either RG or B. It may be that certain elements of a photo will look better using the monochrome CCD and other elements may be better with a higher resolution color mask CCD. I guess that Nikons LED illumination is patented since no one else has copied it. FWIW, I am leaning towards buying this new Microtek if the performance is good, solely out of price. It has been my experience in high tech toys that buying something good but not top of the line is a good plan because you can get a new toy 2 years down the road that exceeds the toy that cost a bundle at present. Given the $1600 list price of the new Mirotek, I bet it will be a bit over a grand on the street, which is a price I can accept. You professionals can write off your toys, er make that tools. [I've rambled a bit too much already, but speaking of write offs, I was photographing a local lighthouse one "dusk" and ran into another photographer with a fully decked out Hasselblad system. It turned out he was a contractor (as in building homes) and used the lighthouse on his business card to deduct the photo gear. He changed the photos yearly on this business cards to keep everything legal.] ----- Original Message ----- From: Frank Pryor <firstname.lastname@example.org> To: <email@example.com> Sent: Friday, August 13, 1999 9:35 AM Subject: Re: Using a NikonLS2000 or Polaroid SprintScan 4000 with a Epson3000 printer ? > And for the technically ponderous among us, the practical difference would be? > > > >Ladies and Gents, there may be more to this. Here is my understanding of how > >the Nikon scanners work. They have a monochrome CCD and LED illumination to > >generate RGB sequentially. It sounds to me from reading the Polaroid > >SprintScan 4000 technical specification that the unit has a Color CCD with a > >RGB "shadow" mask. This is similar to comparing a 3CCD camcorder to a 1CCD > >camcorder. > > > >My point is a pixel is a pixel with a Nikon, while a pixel with a shadow > >mask CCD is a processed pixel. > > > >No flames please. > > > > > >----- Original Message ----- > >From: Jerry Olson <firstname.lastname@example.org> > >To: <email@example.com> > >Sent: Thursday, August 12, 1999 2:11 PM > >Subject: Re: Using a NikonLS2000 or Polaroid SprintScan 4000 with a Epson > >3000 printer ? > > > > > >> > >> ---------- > >> >From: "Gary Sellani" <firstname.lastname@example.org> > >> >To: <email@example.com> > >> >Subject: Re: Using a NikonLS2000 or Polaroid SprintScan 4000 with a > >> Epson 3000 printer ? > >> >Date: Thu, Aug 12, 1999, 11:35 AM > >> > > >> the Polaroid 4000 will give you sharper images, and you can make larger > >> prints than with the nikon. Digital Ice doesn't work on black and white > >> or kodachrome films. > >> > >> Jerry > >> - > >> Please do not include an entire message in your response. Delete the > >excess. > >> http://www.leben.com/lists for list instructions. > >> > > > >- > >Please do not include an entire message in your response. Delete the excess. > >http://www.leben.com/lists for list instructions. > > > Frank Pryor > http://www.pryorphoto.com > > > - > Please do not include an entire message in your response. Delete the excess. > http://www.leben.com/lists for list instructions. > - Please do not include an entire message in your response. Delete the excess. http://www.leben.com/lists for list instructions.
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