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Immersion objectives
OIL:
Only use DIN/ISO standard immersion oil.
n. b.:
Observe the safety information on the im-
mersion oil!
W:
Water immersion. The special water im-
mersion objectives with ceramic front part can
be used for all hydrous solutions.
IMM:
Universal objective for water, glycerine
and oil.
Colour coding
of objectives
→
“Technical data”.
Locking objectives
Some immersion objectives (with knurled grip)
can be locked in a shorter position. This pre-
vents any remaining drops of immersion liquid
from wetting other objectives or specimens when
the nosepiece is turned.
●
Press up the front part by about 2 mm.
●
Lock the objective in this position by rotating
slightly.
Operation of objectives
n. b.:
When using the immersion objective again,
remember to release the lock, as otherwise the
spring mechanism that protects the specimen
and objective will not work and the other
objectives will no longer be parfocal with the
immersion objective.
CORR objectives
These are special objectives which can be
adjusted to the thickness of the coverslip.
●
Roughly set the correction mount to a medium
or estimated value by turning the knurl.
●
Focus the specimen.
●
Adjust the correction mount until you obtain
obtimum contrast, fine-tune the focus with
the fine drive if necessary. This setting may be
very difficult for featureless or low-contrast
areas of the specimen.
!
