>A comparison of the LS4000 and some Imacon, a while back, seemed to indicate
>that the LS4000 has resolution roughly equal to the Imacon's 3200dpi (some
>parts of a test image were better, others worse).
>Does anyone have a thorough understanding of this? Have I got the wrong end
>of the stick?
>Can someone explain how to go from ppi to lpi?
ppi is sampling rate. Under ideal conditions, the maximum lpi is half the
ppi. In practice, lpi is 1/3 to 1/4 dpi or even less if the optics or
focus are poor. For a theoretical discussion see