Zeiss Axiovert 200 Operating Manual page 70

Carl Zeiss
Fig. 3-7 LD condenser 0.55, 6-position,
H, Ph1, Ph2, Ph3, Var1/2
Fig. 3-8 LD condenser 0.35, 6-position,
H, Ph0, Ph1, Ph2, DIC, DIC
The condenser turrets feature the so-called automatic diaphragm mechanism, i.e. the aperture
diaphragm (iris stop) is opened completely when a phase stop position is switched on. When a
new turret position is switched on, the aperture diaphragm is automatically reset to its last
opening.
3-10
OPERATION
Axiovert 200
Condensers (3-1/23)
Depending on their type, condensers (3-7/1) are
equipped as follows:
5- or 6-position turret for:
brightfield: H
phase contrast: Ph0, Ph1, Ph2, Ph3 with
centerable stops
interference contrast: DIC
Varel contrast: Var1, Var2
Aperture diaphragm (iris stop). Use knurled
knob (3-7/2) to open and close the aperture
diaphragm.
Turn the turret wheel (3-7/4) to swing the
brightfield insert or the contrast stops into the
beam path.
The brief description of the set turret position
(e.g. H) is displayed to the user at the front.
Condensers for Varel contrast are equipped
with a knurled knob (3-7/3) which allows the
position of the Varel stop to be changed when
the Varel turret position has been set. The lever
(3-7/5) permits switching between Var1 and
Var2.
The condensers 0.35 and 0.55 for phase
contrast require the use of one SW 1.5 Allen
screwdriver each (plugged in at 3-8/1) to center
the phase stops.
Axiovert 200
B 40-080 e 03/01