Archived posting to the Leica Users Group, 1995/09/11

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To: leica-users@mejac.palo-alto.ca.us
Subject: Leica 180/2.8 Questions
From: questusa@ix.netcom.com (Quest Electronics inc. )
Date: Mon, 11 Sep 1995 20:04:41 -0700
 
.

Hello everybody,

     Here is an interesting question froma gentleman in Hong Kong.

     PLEASE REPLY TO THE ADDRESS AT THE END OF THE LETTER.
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I bought a used R-180/2.8(new version) lens recently. The pictures are 
very 
satifised for most of the time.
But when I shooting at objects of more than 20-30 feet away, with 
aperture
set to 2.8-4.0, I find the images degrades a little bit, less sharper 
than
my R-90/2.8.

I suspect :
- probably this is not a APO lens, image will degrade for distant 
objects
  with aperture wide open. 
- using a UV filter to replace my skylight to reduce ultraviolet rays.

If that's true, is it wise to give it up and go for a 180/3.4APO?

Please advise.

--
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* Please reply to :                             *
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*        wongfr@hkstar.com       and            *
*        frwong@hkjc.org.hk                     *
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