Archived posting to the Leica Users Group, 1998/11/19

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Subject: Re: [Leica] MTF explanation
From: Nathan Wajsman <nathan.wajsman@euronet.be>
Date: Fri, 20 Nov 1998 00:00:45 +0100

Carsten,

You are right, my question concerned MTF curves for film, not lenses, but I
still cannot see how a film can produce more detail than in the original
scene. In any event, Dick Chandler has sent Fuji a message asking this
question and will post the reply on LUG.

Nathan


Carsten Bockermann wrote:

> Nathan,
>
> >>MTF is equal to how much of the line pairs is reproduced by the lens<<
>
> a lens cannot produce an imager that has higher contrast than the original
> scene, so the MTF value has to < 100% for any spatial frequency. A film
> can, and I believe the original question dealt with MTF curves for film.
>
> Carsten
>
> http://ourworld.compuserve.com/homepages/Carsten_Bockermann/



- --
Nathan Wajsman
Overijse, Belgium

Photography page:  http://members.tripod.com/~belgiangator/index.html
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