Re: Epson 10000XL scanner and i1 profiler
Re: Epson 10000XL scanner and i1 profiler
- Subject: Re: Epson 10000XL scanner and i1 profiler
- From: Ernst Dinkla <email@hidden>
- Date: Mon, 01 Sep 2014 17:29:29 +0200
The dpi numbers in scanner manufacturer's documents should be interpreted
as SPI numbers, samples per inch and not as PPI pixels per inch or any
other unit that suggests information content per inch. In practice the best
information per inch in the image can still be the result of using the
highest SPI setting. Epson's oversampling in film scanning does help on
noise reduction/dynamic range, the user can still resample to a lower PPI
resolution afterwards with the right resampling algorithms. Not comparable
with drum scanners the prosumer flatbed models like the V700-V750 can
deliver nice scans of MF to 4x5 film sizes. If used with wet mounting, film
clinged to the underside of for example the Betterscanning wet mount
holder, image emulsion towards the sensor, the holder tweaked for best
focus and the scanner driven by Vuescan with appropriate settings.
"RAW"export, ACR deconvolution sharpening etc helps too. For that matter I
think that the lens design in this type of flatbed scanners is actually
hitting diffraction on purpose to create a more equal sharpness over the
scan width. It asks for some devotion but I often prefer that scanner
above the Nikon 8000 that I tweaked in similar ways but tends to
exaggerate film grain and overexpose shadow detail in B&W negatives. These
days I only use its green LEDS when scanning B&W negatives. The Nikon's SPI
versus usable PPI is more correct though, Image Engineering thinks it can
deliver 3800 PPI resolution and they used it as intended :-)
Met vriendelijke groet, Ernst
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