"Bob Blakely" <[EMAIL PROTECTED]> wrote: >The wording, line pairs per mm, implies two black lines and two white lines >in as much as "pairs" is plural and also because there are many more than >two lines in the target. This would mean that line pairs per mm would be >half of lines per mm.
Hmm. At least one source I've seen regarded one black line and one white line as a "pair". -- Mark Roberts Photography and writing www.robertstech.com
