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[OM] 200/f4 vs. 180/f2.8 (Old and modern).

Subject: [OM] 200/f4 vs. 180/f2.8 (Old and modern).
From: "Ángel Lobo" <angel.lobo@xxxxxxxxxx>
Date: Fri, 15 Oct 1999 19:08:45 +0200
Sometimes ago I have read on an Olympus OM brochure that the last version
of the 180mm f 2.8  engraved "Zuiko" is a lens made  with  "special optical
glass".

Can somebody tell me something concerning this matter ? 

Is this "special optical glass" something like LD or SD glass ?

Does anybody know the differences on performance between the two 180mm f
2.8 lenses, the first one engraved "Zuiko MC" and the modern  ("special
optical glass") engraved "Zuiko" ? 

Thanks.

Ángel Lobo.
CUENCA (Spain).

angel.lobo@xxxxxxxxxx

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