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Re: [OM] Is this guy telling the truth...?

Subject: Re: [OM] Is this guy telling the truth...?
From: gma <geanders@xxxxxxxxx>
Date: Thu, 04 Mar 1999 12:03:24 -0800
At 12:14 PM 3/4/99 -0500, you wrote:
>Hello everyone
>
>I've been on this list for about two months, and have not yet posted to it,
>but I have enjoyed reading the various lines of discussion.

Welcome

>
>I wonder if someone could take the time to read through this, and tell me if
>what I've been told is true?
>
>A short while ago, I got hold of a Zuiko 85mm f2 lens in almost perfect
>condition. Before I bought it, I did all the tests in the FAQ on the lens, and
>it passed with no difficulty. In particular, I noticed that when the aperature
>ring was set to f16 (stopping it down as much as possible), the lens stayed
>wide open (until, of course, the depth of field preview button was pressed or
>the shutter fired).

This is the way it should work.

>
>Now, as I'm sometimes a very silly cow, I managed to drop this fine piece of
>work, and thankfully (if that was the right word to use) the only apparent
>damage was that the depth of field preview didn't work, i.e. the button was
>just 'loose'.
>
>I took my beautiful lens to a local shop for repair, and it was returned to me
>after a week. The depth of field preview button works fine, but as I move the
>aperature ring from f2 gradually to f16, the aperature blades close slightly
>(about f4 to f5.6) and remain that way. When the depth of field preview is
>closed (or the shutter fired) the aperature closes down as it should, and
>returns to the partially closed state (f4 - f5.6).
>
>I pointed this out (along with a rather alarming foreign body that had found
>itself on the inside of the rear lans group) and he's had the lens for 10
>days. He tells me that the f2 is designed to close down slightly as the
>aperature ring is turned, and there isn't that much space in the lens barrel
>to accommodate this.

This is not true.  The lens of course should work as it did before.


>
>Now, I know this is probably asking a lot of you (after all, you have got
>lives of your own to lead!) but is this true about the aperature closing?

No.

> Is he making this up?

Yes. (You can tell cause he probably wagged his finger at you.)

> I know I'm a complete fool for dropping the thing in the
>first place, and I appreciate I could easily have damaged the lens quite
>badly, but if it's broken why doesn't he just tell me so? I can live with this
>minor 'undocumented feature', and I don't want to throw money at futile
>repairs.
>
>If the guy is having me on, can anyone recommend somewhere I can get it fixed
>in the UK...?
>
>Out of interest, I have a Zuiko 28-48 f4 zoon, which has been a great little
>thing to use over the years. Now, I found, after checking all my other lenses,
>this lens is the only one that exhibits anything like a similar sort of
>behavior, but it has difference characteristics. The aperature on this lens
>closes down gradually as you move from 48mm to 28mm on the zoom ring, and this
>is independent of the aperature ring setting. 

I don't think this is normal either.  I'll try to remember to check mine tonite.

I've never noticed this before
>(and this is not surprising given the size of the hole the light has to go
>through, even when open!). Is this normal? My 75-150 f4 doesn't do this at all
>(however, I did once drop this one down the side of a cliff!).
>
>Your thoughts will be greatly appreciated, and I'm sorry if I've broken any
>hearts by wrecking such a fine piece of equipment.
>
>Miranda
>
>

George

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