The generic Nikon to EOS adapters can cause big problems.
http://www.16-9.net/lens_tests/15mm_2/sigma1224vnikon15f.html
If the thickness is off it should only affect the lenses having floating
lens elements. If all of the lens elements move together as a single group,
the distance markings would be off but the lens would work fine otherwise.
So for OM lenses: many of the f2 lenses, the big white telephotos, probably
the zooms, and some of the nice third party telephotos such as the Tamron
400/4 may suffer.
The MF-1 and MA-1 looked like they were within measurement tolerances of
each other according to the article Piers posted a link to.
-jeff
-----Original Message-----
From: Richard Man [mailto:richard-lists@xxxxxxxxxxxxxx]
Sent: Saturday, December 06, 2008 1:00 AM
To: Olympus Camera Discussion
Subject: [OM] OM to 4/3 adapter thickness....
Wait a minute, if MF-1 and MA-1 differ in thickness, doesn't that
mean one of them is not optimal? I have a generic adapter, and it
looks to be slightly off (backfocus), could that be the reason?
--
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