Archived posting to the Leica Users Group, 2001/07/25

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: RE: [Leica] Nyquist again (was scanning)
From: "Austin Franklin" <>
Date: Wed, 25 Jul 2001 20:02:05 -0400

> All this has drifted quite a bit from the original point, though,
> which was that
> 53 lp/mm is entirely adequate for most 35mm photographs (which
> rarely get beyond
> 40 lp/mm), and that it is also quite achievable with a 2700-dpi
> scanner.

53 lp/mm is achievable with a 2700 SPI scanner, ONLY if the lines were
perfectly lined up.  That's useless.  Any company who would put in their
spec that their 2700 SPI scanner could reliably scan 53 lp/mm would be
laughed at, and would be lying.

I guess there is some other reason CDs have a sample rate of
order to reliably capture 20kHz.

> A 4000-dpi scan results in a very
> modest improvement,

Modest?  That's quite an amorphous term.  I can easily distinguish between a
scan of Delta 100, or even VPS160 at 2700 vs 4000.  How old are you?  Do you
need glasses?

Replies: Reply from "Mxsmanic" <> (Re: [Leica] Nyquist again (was scanning))