> So, how does one measure ease of focusing in a lab? How does one measure
> comparative ease of focusing (say a 35mm lens v a 105mm lens)? What tests
> are used, what equipment is used? How do you define "ease?" Is the lens
> tested on a camera, or is the camera something that gets in the way of an
> objective test? Is there an "easy of focusing" machine to which the lens
> is attached? Do you use more than one sample of each lens? Do you change
> the light at times, vary the subject? Is there an "ease of focusing" test
> target? How does the target relate to real world subjects? For example,
> does the lab target have a face? A nose? Eyes? Wear glasses? Or is it
> some flat sheet of paper with grid lines on it?
>
> Shel
>
>
Again... I believe I was careful not to say, "ease," but rather
"accuracy." The latter can be objectively measured and quantified and the
former will always be run through an individuals' personal preferences.
-Cory
--
*************************************************************************
* Cory Papenfuss, Ph.D., PPSEL-IA *
* Electrical Engineering *
* Virginia Polytechnic Institute and State University *
*************************************************************************
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