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Re: Lines per mm Realist ( digest 1604)

  • From: P3D Bob Howard <bobh@xxxxxxxxxxxxxxxxxxxx>
  • Subject: Re: Lines per mm Realist ( digest 1604)
  • Date: Fri, 11 Oct 1996 23:27:20 -0700
RE: Dennis thinks 100 lpm reported for Realist might be high?

Tuis can be sticky if not well defined. First what is called lines per
mm, might be line-pairs per mm. i.e. on black line and one white space.
Secondly, the optical resoluton seen by eye though a microscope might be
used for testing or inspection, but might not be achieved on film! BobH
(I have seen Olympus OM 50mm f/1.8 tested on film at 100 lpm. Many
cameras lenses now depress resolving power to get more contrast that
looks sharper in the size prints usually ordered.) BobH


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