Nikon SMZ25 Instruction Manual page 48

 Attaching a filter cube
Attach the filter cube to the turret in the epi fluorescence attachment. Up to four filter cubes can be attached.
Do not touch the surface of the filter with bare hands
Scratches or fingerprints on the filter surface will degrade microscope images. Handle the filter cube carefully.
(1) Remove the filter cube replacement hole cover on
the right side of the epi fluorescence attachment (as
viewed from the front). Push it upward to remove.
(2) Align and insert the dovetail groove of the filter cube
to the internal dovetail until it reaches the limit. The
installation positions are numbered from [1] to [4]
and are shown on the left inside of the filter cube
attachment hole.
Be sure to attach four cubes to the turret.
Attach an empty cube to the position to which no filter
cube is attached.
(3) Affix the filter cube indication label.
Labels indicating the type of filter cube are supplied
with the epi fluorescence attachment. It is useful to
identify the type with the labels. Affix a label
indicating the type of attached filter cube to the label
attachment position at the top of the filter cube
attachment hole. Numbers 1 through 4 are indicated
next to the label indents. Affix a label for the
attached filter cube to the indent corresponding to
the filter cube address.
(4) Replace the cover of the filter cube replacement
hole.
Chapter 3
Assembling
Removing the filter cube replacement hole cover
Affixing a label indicating the type of the filter cube
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Attaching the filter cube