Digital BW, The Print

Probably a better test of the V600, at least they mentioned the focus tweak:
http://www.imaging-resource.com/SCAN/V600/V600.HTM
One would expect that Vincent of Photo-I learned something of the 
V700/750 tests.

The I-R test mentions resolutions based on the Epson specs. Epson 
actually quotes sampling per inch numbers which is something else. If 
the sensor well size is wider than the well pitch distance and sensor 
stepping distance you can never achieve the same optical resolution 
numbers that the sampling per inch suggests. However the technology 
Epson uses (and Umax used) is called oversampling and it has its 
advantages in reducing noise and (by that) increasing the dynamic range. 
There are good and bad pixels, quantity does not tell all. On top of 
that drivers like Vuescan and Silverfast can add multi-sampling  and/or 
a second scan with longer exposure that is stacked with the normal scan 
to increase the dynamic range even more. www.Image-Engineering.de has a 
PDF of test results for the Silverfast feature, older Nikon and Epson 
scanners.


-- 
Met vriendelijke groet, Ernst Dinkla

http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
December 2012: 500+ inkjet media paper white spectral plots.