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[filmscanners] RE: Suggestions for scanning 4x5 transparencies



Hi Paul,

> >> Since those are laid down on a 1440x2880 (or whatever) grid,
> >
> > Check the print modes in either the service manual or a detailed spec
> > sheet. For the 3000 they are 180x180, 360x360, 720x720 and
> > 1440x720...BUT the 1440x720 is using MicroWeave, and has the EXACT
> > number of "available dots" as the 720x720 mode.
>
> That's why I said "or whatever". The dither algorithm works at
> whatever dot
> pitch you select, not at some fixed 720dpi (for desktop printers).

I don't believe anyone ever said, or even hinted, that at all.  I don't know
where you got that idea from...

> You had expressed a suspicion that when the Epson document referred to
> resampling at 720dpi, instead of 720ppi, they were referring to something
> related to the dithering. I was merely correcting that, saying
> that they did
> indeed mean 720ppi, as evidenced by the behavior of their driver.

I was merely pointing out that what people believed they were saying was
open to interpretation as there were things that were either mis-stated, or
it meant something different than people's apparent interpretation.

I'm not convinced the "evidence" is there yet, as I haven't seen it.  I'll
download the PDF test file, and see what it does...but without seeing the
file, and understanding what the actual "test" does, I don't know if the
test is even at all proper.  I'm happy to evaluate it, and let you know what
I think.

Regards,

Austin

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