Piers Hemy wrote:
>It must be because on a 4/3 mount, an OM lens is at a different distance
>from the "film plane" than it was designed for.
>
>The register on an OM camera is 46.5mm, while the register on a 4/3 camera
>is about 38.7mm
>
>How thick is the MA-1 adaptor?
>
Wayne Shumacher said back in July:
---------------------------------------------------------------
"The OM FOURTHIRDS Adapter given away by Olympus is as good as an OM
auto extension tube as far as quality of materials. The only thing I
have noticed is that infinity focus is just slightly off, that is you
can over-focus, which I assume means the thickness of the adapter is
just slightly short. I'm sure there is a good reason for that?"
---------------------------------------------------------------
And I may recall someone (? C.H?) else saying the MA-1 may be about
0.5mm shorter than the Kindai.
The only straightforward reason I can see it to be sure that there is no
normal mount lens that cannot focus to infinity under any circumstances.
Since all normal lenses focus to infinity on OM bodies, that doesn't
make sense. Any other, non-conspiracy, theories?
Moose
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