RE: [Leica] Tri-Elmar focusing

["Shahinian, Vahan" <shahinianv@genrad.com>]

Tom,

That's an interesting observation. I have seen the same thing. I'll try
your suggestion. I seem to remember reading or hearing that the focus
mechanism is not a standard helicoid arrangement, but instead uses a
synthetic cam.

Vahan

- -----Original Message-----

Vahan, I have noticed that if I store the lens with the distance scale
at
infinity, it catches at a point lust short of infinity when I start to
use it.
I now store the lens with the distance scale at the minimum focusing
distance
and have no problem.  I theorize that the rubber like substrate of the
focusing ring has a short term memory that retains a small dip where the
focus
is set.

Tom Shea