At 03:53 PM 3/14/2002 +0000, Jeff K. wrote:
<< The only thing I can imagine is a CAT with a teleconverter mistaken
as zoom. Mirrors don't adjust their focal length. >>
The Olympus 500mm f/8 Reflex Zoom does. It looses focal length as it
focuses closer. It is only a 320mm lens at its closest focusing
distance. I suspect that its unique construction vs. other catadioptric
lenses results in some degree of internal focusing. Loss of focal
length at near distances is a disadvantage to internal focusing lenses.
Gary Reese
Las Vegas, NV
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