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Leica DM750 P Manual 26
The condenser is furnished with an iris
diaphragm, which can be adjusted to
match the effective numerical aperture of the
objective.
1. To open and close this diaphragm, simply
rotate the knurled condenser ring to the
right or to the left so that the line on the
rotating ring aligns with the objective
magnification in use.
2. To start, fully open the iris diaphragm of the
aperture condenser by rotating the ring to
the extreme right.
Using the Aperture Condenser