Inserting The Reflected Light Illumination Filter; Using The Nd Filter Lever - Olympus BX53M Instructions Manual

3-14 Inserting the reflected light illumination filter

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Canceling the link
a
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Using the ND filter lever

This function is available only with BX3M-RLA-S.
The ND filter links with the selection of the observation method. Using
this ND filter reduces the glare when the light path is changed from
the darkfield (DF) to the brightfield (BF). Use the brightfield/darkfield
selector knob a to select the observation method.
As factory default, the ND filter is linked with the selection of the
observation method.
If the brightness is not sufficient when performing the brightfield
observation or the DIC observation, you can cancel this link.
Insert the Allen screwdriver into the hole on the left side of the reflected
light illuminator to loosen the screw that connects the ND filter
sufficiently. By doing so, the ND filter lever works.
Pull out the ND filter lever and remove the ND filter from the light path.