Because you can - because it's there.
Surely you've worked that out by now.
The pin is nothing like the spring-loaded auto pin on a standard auto M42 lens.
It's a rigid pin on the outer rim of the lens. Fujica had something similar in
itsM42 lenses. It interferes with the full screw down of the lens on to the
adapter. A slot is not enough as the lens has to be screw down almost a full
turn after the pin fouls the outer edge. The only way is to turn a relief
greater than the depth f the pin in the shoulder of the adapter. Equally, one
could reduce the diameter of the adapter but that makes it hard to remove fro
the lens.
Andrew Fildes
afildes@xxxxxxxxxxxxx
www.soultheft.com
Author/Publisher: The SLR Compendium - http://www.blurb.com/books/3732813
On 24/01/2013, at 8:37 AM, Moose wrote:
> But I gotta ask - why? If you want the old Zuiko experience, an early 50/1.8
> on OM=>EOS adapter would do that. (Those
> aren't especially good lenses, in the resolution/contrast category.)
--
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