Apache-Talk @lexa.ru 

Inet-Admins @info.east.ru 

Filmscanners @halftone.co.uk 

Security-alerts @yandex-team.ru 

nginx-ru @sysoev.ru 




      :: Filmscanners
Filmscanners mailing list archive (filmscanners@halftone.co.uk)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: filmscanners: Scanner resolution (was: BWP seeks scanner)

Paul Chefurka wrote:

> After all, 4000 ppi gives a resolution of 75 lp/mm or so, and it takes pretty 

technique to actually get that kind of resolution onto film.  Or is my crude 

assessment incorrect, and we actually can't resolve detail in the scan at more 
than half that - 

say 40 lp/mm with reasonable contrast?  Even that level is still sufficient for 
prints that 

appear "sharp" at normal viewing distances.

I think there are two issues here.  One is that a 4000 dpi scanner 
doesn't capture 4000 dpi, and I've yet to get a straight answer on what 
they actually capture.

Secondly, the nature of the CCD sensor is that of a soft edged scan due 
to a number of aspects of the nature of these chips, so you might be 
right that using current technology will not allow for much improvement.



Copyright © Lexa Software, 1996-2009.