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

Subject: Re: [OM] Tamron Adaptall OL vs OM screw locations
From: Johnie Stafford <jms@xxxxxxxxx>
Date: 25 Jul 2003 02:56:59 -0500
>>> On Thu, 24 Jul 2003 22:39:03 -0700, Jeff Keller <jrk_om@xxxxxxxxxxx> said:

 jk> Notice the screw locations
 jk> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2942362875&category=3
 jk> 0059   OM
 jk> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2941743030&category=3
 jk> 0059   OL

 jk> I believe the "OM" are all supposed to be bad ...
 jk> That while some of the "OL" are bad all of the good ones are labeled
 jk> "OL".

 jk> The screw head at the top of the picture looks like it is the one near
 jk> the red dot on the lens. The next screw head clockwise is the one which
 jk> would end up close to the reset button when the lens is completely
 jk> mounted on the camera.

 jk> If I'm seeing the pictures correctly the second screw head and the small
 jk> tab near it (which is used to manually stop down the lens) are both
 jk> slightly closer to the to the first screw head on the bad mount.
 jk> Perhaps the easiest way to tell the good from the bad is that one edge
 jk> of the manual stop down tab is inline with the second ear of the bayonet
 jk> mount (next to Japan) on the good mount.

 jk> Does this make sense to anyone besides me?

I thought all of the "OL" mounts were good and the "Olympus OM" were
bad. Where "bad" means don't use it on an OM-3* or an OM-4* body. Both
work without a problem on -1* and -2* bodies.

But now that I look at all the mounts I have and the pics on these 2
*Bay items, I see that there are 3 different sets of markings. There
is one kind that is marked "OL  JAPAN", and another that is marked
"ADAPTALL 2 for OLYMPUS OM  JAPAN". I can't find ANYTHING different
between these two mounts. The one in the picture for item 2942362875
which is labeled "O/OM  JAPAN" appears to have one of the screws (and
possibly the DOF preview slider) in a slightly different location. 

Johnie


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