Instruction manual |
21
In brightfield, optimum observation is generally possible by
setting the aperture diaphragm to between 70% and 80% of
the numerical aperture of the objective.
In phase contrast (PH) or in darkfield (DF), the aperture
diaphragm must be fully opened by operating on the AS lever.
APERTURE
DIAPHRAGM
FIELD OF VIEW
30-20%
70-80%
FIGURE 41
