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RE: [OM] Tamron Adaptall OL vs OM screw locations

Subject: RE: [OM] Tamron Adaptall OL vs OM screw locations
From: "Daniel" <danrich@xxxxxxxxxxxxx>
Date: Fri, 25 Jul 2003 13:26:16 -1000
I've been using the wrong one for month and can't understand how the
black spring loaded button would shear off if it drops out of the way
when swiped over. 
Maybe I've just been lucky not to break it? 
I have the OM4Ti or is it the OM4 it happens on?
Dan

-----Original Message-----
From: owner-olympus@xxxxxxxxxxxxxxx
[mailto:owner-olympus@xxxxxxxxxxxxxxx] On Behalf Of Kennedy McEwen
Sent: Friday, July 25, 2003 12:30 PM
To: olympus-digest@xxxxxxxxxxxxxxx
Subject: Re: [OM] Tamron Adaptall OL vs OM screw locations

In article , JMeyers102@xxxxxxx writes
>Hi,
>
>I missed the reason as to why one version is good, and one bad. I see
from
>the 2 auctions cited that the mounts are different, at least with 
>regard to the
>screw positions. But is it the screw positions themselves that is the
problem,
>or some other aspect of the mount. Would someone please explain why one
is
>problematic. (I gather that the difference only applies to OM-3 and 
>OM-4 bodies).
>
With these bodies the spot meter reset switch is built into the lens 
flange and on some lenses the screws wipe over the switch, slicing the 
top off it, if they happen to be in the wrong place.

Whilst Olympus always used three screws on the lens mount and the switch

was positioned to avoid these, many independent manufacturers used four 
symmetrically placed - guaranteed to ruin the camera if fitted to a body

with such a reset switch.

Took me all of 3 minutes to achieve this on a  brand new OM-4 back in 
1984 - then I read the little pink warning sheet Olympus had placed 
inside the instruction book.  Honestly, how stupid would you have to be 
to need to read an instruction book?   :-(

Fortunately, Olympus repaired it under warranty, but in the process 
damaged the top plate, which meant a further repair, taking three months

in total.  I don't know if this was related, but that OM-4 was the least

reliable Olympus camera I ever owned and eventually I sold it after its 
3rd warranty circuit replacement (of 7 repairs including those first 
two).  I just hope that my current one, having just been repaired 
recently, hasn't started down the same track.
-- 
Kennedy
Yes, Socrates himself is particularly missed;
A lovely little thinker, but a bugger when he's pissed.
Python Philosophers

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