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Re: [OM] Snappy Lens Definition Please

Subject: Re: [OM] Snappy Lens Definition Please
From: rdk@xxxxxxxxx
Date: Fri, 16 Jun 2000 11:52:14 +0200


I have had two lens with similar symptoms; a Kiron 24mm f2, and a Zuiko 85mm f2.
The Kiron was cured after the diaphragm was cleaned (oil!). The Zuiko is not too
bad, so I live with it - no winder though. The Zuiko has oil on the diaphragm
blades, but not too much...
Regards, Roger Key




mikew wrote:
>I guess I need a little education here.  I always assumed that with respect
>to a lens snappy meant that the action of the diaphragm in stopping down and
>opening back up was very quick, with no hesitation.  My first Vivitar Series
>1 28-90 after years of faithful service  seemed to stop down as quickly as
>ever but would open back up when it felt like it (which would always be
>several to many seconds later).  At the time I was told that this was called
>a sticky diaphragm.  That particular lens now gathers dust in my bag.

>Fast forward now.  I acquired one of the > 1,000,000 serial number f1.4's in
>an eBay auction.  It stops down quickly (at least subjectively) but in
>opening back up, the diaphragm blades seem to glide back into open position.
>This takes some noticeable time (but well less than a second).  I came
>across a 50mm f1.2 Zuiko (graded E) on KEH's site late last week, ordered
>it, and received it yesterday.  Same diaphragm action as with the f1.4.

>etc.









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