In article ,
[email protected] says...
It was never as simple as "screw or bayonet". There were two fairly
common screw mounts, Leica and Pentax, and a few others less common, and
ever manufacturer that had a bayonet made their own design.
There most assuredly is an adapter to use OM lenses on Canon EOS
cameras, whether film or digital
. There is no adapter to use
them on Nikon as the Nikon body is thicker than the Olympus body and
they would not be able to focus to infinity. While the Minolta body is
thinner than the Olympus the mount diameter is also smaller, so again
you couldn't make a mount that would focus to infinity.
I don't know where anyone gets the idea that digital cameras with
interchangeable lenses are all made in the same factory with different
names on them. The mounts are different, the internal components are
different, in some cases the designs are radically different. Compare
an Olympus E-PL2 with a Canon 5D Mk II, compare both of those with a
Nikon D-90.
Nikon digitals use the same mount that Nikon has always used. Canon
uses the EF mount that they've been using ever since they first produced
the EOS line of film cameras. Sony is using the same A mount that
Minolta has been using ever since they introduced the Maxxum. Olympus,
Panasonic, and Leica have signed onto the four-thirds consortium and
make cameras that can interchange lenses between the three brands--some
of those models _are_ made in the same factory with different brands.
However Leica also makes their digital M line which uses the same lenses
and accessories as every other Leica M.