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Re: [OM] Focusing a 28mm f/2.8 lens

Subject: Re: [OM] Focusing a 28mm f/2.8 lens
From: Ray Moth <ray_moth@xxxxxxxxx>
Date: Sun, 11 Feb 2001 20:36:20 -0800 (PST)
Jim Lamadoo wrote:
(Snip) . . . The last time I used the 28, I was in
full sunlight and chose an aperture near f/8 for maximum sharpness.  My
subject was sitting in a chair, so I had ample time to focus carefully.
 Inoticed that it never "snapped" into focus.  I could turn the
focusing ring through a 2 or 3 mm arc, without the focusing screen
getting any better or worse . . . (snip) . . . Would it help to
"bracket" the focus or is it just a mediocre lens?
======================================================================
Jim, 

Welcome to the Oly List. Regarding the Zuikio 28/2.8, this lens is
generally well regarded. I have one and have always been pleased with
the results. 

The fuzziness you have been experiencing reminds me of a problem that
has developed over the last few months in my Leica Mini Zoom P&S
camera. It mystified me at first, because the lens front and rear
elements seemed to be clean, but when I peered carefully through it,
with the camera in B mode and the shutter held open, I found that it
had a bad dose of fungus. This appeared as white, crystal-like threads
spreading across the glass of an interior element.  

Try examining your 28/2.8 lens to see if this is the case. I hope it
isn't, for your sake, because fungus can be difficult to remove without
damaging the coating. 

Regards,

=====
Ray

"The trouble with resisting temptation is
 you never know when you'll get another chance!"

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