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Re: Practical examples of stopping down and diffraction (was: Re: Konica IR ...!st time, hyperfocal focusing, and Stigmata)

  • From: Eckhard Stephan <eckhard.stephan@xxxxxxxx>
  • Subject: Re: Practical examples of stopping down and diffraction (was: Re: Konica IR ...!st time, hyperfocal focusing, and Stigmata)
  • Date: Sun, 26 Mar 2000 11:45:17 +0200
> You'll see that the lenses compared have their best
> optical performance around f8-16. The Yashinon suffers
> from diffraction at f32. These values are for the visible
> part of the spectrum. For the near-infrared you shold
> probably open the aperture at least one f-stop.

Which in turn increases the probability of focussing problems becoming
visible. Life is hard, if you want that perfect IR pic...;-)

Eckhard 

-- 
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*          Eckhard Stephan             * 
*          Freiburg (Germany)          *
*     eckhard.stephan@xxxxxxxx         *	
*   http://www.eckhards-photobox.de    *   
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