Focusing, Mechanical - Leica DM R Serie Mode D'emploi

Stage clamp*
Stage height setting (interchangeable stage
only *)
The following chapters describe how to focus
the specimen. The stage height can also be
adjusted with the stage clamp (48.9). The stage
should be clamped at the level where the
thinnest specimens just touch the objective with
the highest magnification at the highest possible
setting of the coarse/fine drive. As high-power
objectives always have telescopic front spring
loading, there is hardly any risk of damaging the
specimen or microscope.
!
Attention:
Don't forget to release the locking mechanism
on immersion objectives (page 51).
Loosen clamp screw (48.9) on the left of the
stage bracket. Supporting the stage with both
hands, carefully move it up or down.
!
Attention:
Make sure the condenser does not touch the
microscope base.
Temporarily retighten the stage clamp.
Put the thinnest specimen you are going to
examine (e.g. transmitted light object) on the
stage and move the stage up to the stop using
the coarse drive (42.12 and 44.2). Loosen the
stage clamp again (48.9) and carefully move the
stage upwards in the dovetail guide until the
specimen just touches the objective with the
highest magnification, or an image can be
focused.
If working with ordinary transmitted light
specimens of 1 – 1.2 mm thickness you can also
clamp the stage so that the stage bracket is
flush with the upper end of the dovetail guide
(12.4) after setting the upper stage stop.
Focusing, mechanical dual knob drive*
The smaller dial (42.12) is for fine focusing; one
division of the scale represents a vertical
movement of approx. 2 µm (see page 107). The
larger dial is for coarse focusing.
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