Mark Roberts mused: > > Martin Trautmann <[EMAIL PROTECTED]> wrote: > > >I did not read the KAF3 patents myself (three from 2001?). I doubt that they > >would provide real information how the mount would look like. But there > >should not be only less than KAF2, but somehow more. This may be hidden > >within the digital contact, being information only. But maybe some further > >contacts or mount extension will be required which would proof that current > >lenses and bodies are not yet KAF3. > > I'll bet you 500 Quatloos that IS/USM contacts eventually show up in the > area where the "aperture simulator" ring used to be :)
I'll take that bet. There's still the aperture actuating lever, which is pretty close to the location of the aperture sensing cam. There's no need to place any newly-introduced extra power & data contacts there; there's still quite a bit of unused space in other parts of the lens mount. I'm sure the aperture sensing was dropped as an independent decision to eliminate a redundant mechanism, rather than being forced to make space for some future connectors. That doesn't necessarily mean I think it was a good decision; just that it was a decision taken solely on the perceived merits of the link.
