55
4.10 Use of light filters*
3 light filters are permanently integrated in the fil-
ter magazine (73).
These are moved into the light path via 3 swit-
ching levers (74.1).
It is not possible for customers to exchange
these filters.
Upper lever – PG
Green filter, panchromatic – for general enhance-
ment of contrast and black-and-white photography
Middle lever – DLF
Daylight filter, similar to CB 12 conversion filter
for colour photography with daylight film.
For good and reproducible results with colour
photography, the lamp intensity should be set at
the white dot between 10 V and 11 V on the
adjustment wheel of the power supply.
Lower lever – BG20
Contrast filter for enhancing red and blue for
colour photography and video
Other filter positions
2 other positions for filters of 50 mm Ø diameter in
holder in the lamp mount (7.2) and in the mirror
housing (8)
2 other positions for filters of 50 mm diameter in
holder in a special intermediate piece (75.2)
which can be installed between the lamphousing
and the lamp mount or mirror housing.
The following filters of 50 mm diameter are re-
commended:
Conversion filter CB 12
for colour photography with daylight film,
order no. 514093
Diffusing screen N
for diffusion and attenuation,
order no. 514042
VG 9
green filter for contrast enhancement,
order no. 514041
Neutral density filter 0.2%
for light attenuation without influencing the
colour temperature,
order no. 514031
ALF filter
artificial light filter for enhancing contrast
in colour photography with artificial light film,
order no. 514756
Protection filter for incident light polarisers (39.1)
To protect incident light polarisers when using
gas discharge lamps (Hg, Xe), a Pol protection fil-
ter must be inserted in the lamphousing mount.
Fig. 73
Back view of microscope without lamphousing mount
1
Filter, 20mm diameter, can only be fitted by service technician
1