Filters - Leica DMLS Bedienungsanleitung

Filters

The light filters have the following functions:
Transmitted light
Filter Application
Grey filter Grey filters (neutral density filters)
are used to attenuate light without
influencing the colour temperature.
The engraved value, e. g. N 16, in-
dicates the attenuation value. N 16,
therefore, means reduction to 100/16
= 6.3 % transmission, integrated in
filter magazine (11.3) N 16:
Green filter, Contrast enhancement for black-
panchro- and-white photography, integrated
matic filter magazine (GR).
DLF Daylight filter = conversion filter
(blue, identical with CB 12) for
colour photography with daylight
film, integrated in filter magazine.
BG 20 Highlights in red in Polaroid expo-
sures.
VG 9 Contrast enhancement for chromo-
(green filter) some photography.
BG 38 Suppression of red in fluorescence
(blue filter) (is integrated in fluorescence illu-
minator (31.8)).
Apart from the non-interchangeable N 16, DLF
(= Daylight filter, formerly CB 12) and green
filters integrated in the filter magazine (Fig. 11),
filters (with mount diameter 32 mm) can be
inserted into the filter holder (12.3), see also
DM L/DM R data sheet.
30
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Brightfield, Koehler illumination*
Turn a low-power objective (4x to 10x) into the
light path and focus the object (23.5).
Condensers field diaphragm*
Close the field diaphragm (23.10).
Narrow the aperture diaphragm (23.7) if
necessary.
Rotate the condenser stop screw (23.4) in a
clockwise direction and move the condenser to
the highest position with the height adjustment
(23.3, bilateral). Click the condenser disc (23.8)
into the BF = brightfield position or pull out the
light ring slide (7.7) as appropriate.
The condenser must be properly fitted in its
mount (not tilted). Check that the fixing screw
(10.3) is firmly in position.
By rotating the condenser stop screw (23.4) or
the condenser height adjustment (23.3), lower
the condenser until the edge of the field
diaphragm appears sharply focused (24b).
Centre the image of the field diaphragm with
both centering screws (23.9), i. e. until it is in the
centre of the field of view (24c).