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Leica DM750 Manual 33
Using the Condenser
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
turn the knurled ring on the condenser to
the right or left so that the line on the ring
is aligned with the objective magnification
used.
2. Open the iris diaphragm of the condenser
completely at first by turning the conden-
ser ring all the way to the right.
Using the Condenser
Match the line of the rotating ring with the
objective magnification in use.