Leica DM4000B Manual De Usuario

6. Startup

• Open the field diaphragm just enough for it to

disappear from the field of view (41d).

Caution:

Do not adjust the aperture diaphragm. The aper-
ture diaphragm is already set optimally for each
objective.

6.6. Checking Phase Contrast Rings

Fig. 41

Köhler Illumination

a Field diaphragm not focused, not centered
b Field diaphragm focused, but not centered
c Field diaphragm focused and centered

Diameter is too small, however

d Field diameter (light) = Field diameter (view)

(Köhler Illumination)

Fig. 40

Condenser centering

1 Centering bolts