Leica M165 FC, User Manual

Page: 17 / 160

Leica M Series User Manual The Leica M Series for Fluorescence 17
Leica engineers were careful to ensure that
the new Leica M series – like its predecessors –
remains compatible with existing series. This
means that objectives, bases, tubes and so on
can be reused.
Objectives
All new objectives of the Leica M series are
parfocal, meaning that when used with the
objective nosepiece, they can be replaced while
keeping the specimen in perfect focus.
If you prefer, you can continue to use the previ-
ous Leica objective series. In this case, parfocal-
ity is no longer guaranteed.
Tubes
The interface between the optics carrier and the
tube has remained the same, so existing tubes
fit the new M series. The new tubes are designed
for eyepieces with field number 23, while the
predecessor models were only designed for field
number 21, resulting in a smaller object field.
Eyepieces
However, the new M series eyepieces have an
audible and tangible click to provide immedi-
ate feedback in case of accidental adjustment.
Maximum Compatibility