Zeiss SL 120, Documentation

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Optional accessories
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Mounting a filter changer with barrier filter (yellow)
Fig. 15 Filter changer with barrier filter (yellow)
You can swing the yellow filter into the light path by means of the lever
shown beside.
The filter serves as barrier filter for the work with fluorescein and with a blue
filter in the observation path.
Similar to the beam splitter (Fig. 14), the filter changer with barrier filter
(yellow) is mounted between the stereomicroscope and binocular tube by
means of hexagon socket screws.

Ensure that all screws are properly tightened and that the filter
changer and binocular tube are not misaligned.