Re: IR Focusing and Diffraction

[rsage@xxxxxxxxxxxxxxxxxxxx]

Ben Kreunen replies:
>Try: <http://micro.magnet.fsu.edu/primer/java/diffraction/index.html>

>But basically put, diffraction is made worse by a) smaller apertures
and b)
>longer wavelengths. Aperture in this case is the physical size of the
hole,
>not the f number that we are used to (which is a ratio of the focal
length
>and effective diameter of the hole) so bad diffraction will occur at
wider
>apertures on short focal length lenses than on telephotos.

Thanks for the explanation Ben. That's an interresting sight. I never
knew that beer could be so colorful.
Rod

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