Digital BW, The Print

Andrei,

Fine, but your original statement - "I doubt very much that you can see a 
difference between a 300 dpi file and a 600 dpi sent to the printer, 
regardless of the caliber of the output machine"- didn't mention viewing 
distance, and therefore was incorrect as stated.

In the articles I listed, Roger Clark suggests that the limit of our eyes, 
in good lighting, is about 1000ppi at 10 inches.

AFAIK, the 'standard' of 300 ppi simply arose as a 2x the 150 lpi of 
traditional printing; I don't think it has anything to do with inkjet 
printing or human vision. With Epson printers, you would be better using 360 
ppi from a technical point of view, or anything between 240 and 480 from a 
practical one. Whatever you use, they are all resampled/interpolated to 360 
or 720ppi by the Epson driver.

Bob Frost.

----- Original Message ----- 
From: <aderca@...>


Yes, Bob, I'm familiar with the physics behind this,
most people with normal vision can "resolve" 600 dpi
at 5" distance, most people with normal vision cannot
distinguish above 300 dpi at 10" distance.