49
7. Startup
Adjusting the aperture diaphragm
(DM6000 M only)
• Remove one eyepiece.
• Close the aperture diaphragm with the
AP
keys (43.2) until the edge of the diaphragm
appears on the exit pupille of the objective
(aperture field plane).
• If the image does not appear in the center of
the field of view, the aperture diaphragm has
to be moved with the two centering bolts
(48b.1) on the upper left side of the stand.
• Open the aperture diaphragm so it covers
approx. 2/3 of the field of view .
7.7 Checking Phase Contrast Rings
If your microscope is equipped for the use of
phase contrast, the light rings that fit the objec-
tives are built into the condenser.
The light rings are already centered in the
factory. However, the centering should be
rechecked.
Note:
Every objective is assigned its own light ring in
the condenser disc. Therefore, a check must be
performed for each objective. When swiveling
in a suitable objective for phase contrast, the
corresponding light ring is set automatically.
• Press the
BF
(Bright Field) button (one of the
variable function keys at the stand or at the
LeicaScreen).
• In the place of an eyepiece, insert the focus-
ing telescope (Fig. 49) into the observation
tube.
• Select the phase contrast objective with the
lowest magnification (one of the variable
function keys at the stand or at the
SmartMove).
• Focus on the specimen with the SmartMove
or focus wheel.
Fig. 49 Focusing telescope
1
Adjustable eyelens
2
Clamping ring for fixing the focus position
1
2
