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The procedure for switching to the Dry mode is
analogous:
Again, press the keys “lower z position”
and “focus position” on the control panel
of the microscope simultaneously to switch from
“Immersion” to “Dry”.
The objective nosepiece is lowered and the
message “Change Objective” appears in the
display. You now have the opportunity to put a
new specimen slide (without immersion oil) on
the stage. Then, using the objective changing
key, switch the appropriate dry objective into
the light path (normally the lower objective
changing key). From now on, only dry objectives
or objectives of the “Combined” category are
travelled to.
(“D” now appears in the LC display at the bottom
right).
To learn objective categories, see “Installing the
objectives” (→ p. 44).
Automatic lowering of the objective nosepiece
In order to be able to operate the objective
changing keys easily and without touching the
stage in situations where space is difficult, e.g. if
there are small object inserts in the stage and/or
if the specimen plane is relatively high above the
stage level, the objective nosepiece is lowered
before it is rotated. The end position for this
lowering (= lower z position _↓) can be chosen by
the user.
If the lower z position is not set, the objective
nosepiece is lowered by the maximum possible
distance.