Leica DM IRB manual Automatic lowering of the objective nosepiece

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.

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