48
3-16 Adjusting the field diaphragm of the transmitted light illumination
1
Using the field diaphragm (FS)
a
This function is available only with the microscope frame
(BX53MTRF-S).
Turn the field diaphragm ring
a
to adjust the field diaphragm.
Field diaphragm ring index position
Field
diaphragm
Open to
maximum
Close to
minimum
1
This function is available only with the microscope frame
(BX53MTRF-S).
· Do not turn the condenser clamping screw
a
attached to
the back of the centering knob by mistake.
· If you use the condenser attached with the top lens, such
as U-SC3, etc., engage the top lens in the light path and
perform the centering.
Select the brightfield observation (BF). For procedures to select the
observation method, see "3-4 Selecting the observation method"
(page 17).
Turn the condenser height adjustment knob to raise the condenser
to the upper limit.
Turn the nosepiece to engage the 10X objective in the light path and
place the sample on the stage to bring it into focus approximately.
Turn the field diaphragm ring in the arrow direction to narrow down
the field diaphragm to within the field of view.
1
2
4
2
Centering of the field diaphragm (FS)
2
a
Do not turn.