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Re: [OM] Zuiko 28/2.8 with a sticky diaphragm

Subject: Re: [OM] Zuiko 28/2.8 with a sticky diaphragm
From: Winsor Crosby <wincros@xxxxxxx>
Date: Mon, 14 Sep 1998 19:47:12 -0700
Jay Maynard wrote:

>I just got two lenses in the mail I'd bought on eBay: a Soligor CD
>70-160/3.5, and a Zuiko 28/2.8. Both have problems, alas. The Soligor's auto
>diaphragm doesn't work at all - it's stopped down all the time - and, more
>germane to this list, the Zuiko's diaphragm sticks.
>
>The lens is in gorgeous shape. It's not quite a 10, but only because a few
>of the ridges on the aperture ring are shiny at the very front corner. The
>glass is clean and mark-free, the focus and aperture turn easily, and it
>came with a Vivitar UV filter that looks like it was installed when the lens
>was purchased and never removed.
>
>The problem is that the diaphragm, which closes down easily and snappily
>enough, takes a second or so to open up all the way from f/22. There's no
>oil visible on the blades, and the stopdown lever takes no more effort to
>operate than normal. If I turn the aperture ring quickly from f/2.8 to f/22,
>the diaphragm follows it a bit, stopping down to f/4 or so, before opening
>up again.
>
>Is this something that I'd be nuts to think about trying to fix myself? Is
>it a common problem? Should I send it back and say "you sold me a bum lens"?
>Do I count myself fortunate that I only spent $70 on it, and live with it?
>
I would send it to someone who knows what they are doing, like John
Hermanson on the list and get back a perfect lens for a little more money.

Winsor

Winsor Crosby
Long Beach, California
mailto:wincros@xxxxxxxxxxx





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