Eden wrote:
>
> Could some kind person explain what 'mirror' lenses do?
> --
> Jenna
A mirror, or catadioptric, lens uses a series of mirrors to reduce the
physical length of a long focal length lens. They are usually fixed
aperture, f/8, and are heavy because the mirrors are thick glass.
Look at http://vmsftp.rit.edu/pub/ritphoto/photoforum/faq-28 and go to
section 28-13 for a better explanation.
The above url is part of a large number of FAQ's from RIT.....
Bob
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