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Field Number of eyepiece
Magnification of objective
So, the larger Field Number of eyepiece makes wider field of view for the objective.
WF15x with retainer for micrometer disc and WF20x without retainer are available
as option.
Mechanical Stage:
The long coaxial drive control mechanical stage is provided and makes the operation
much easier. It runs through 70mmx30mm.
The mechanical stage has vernier scales for measurement of movement in the X-Y
axis. The minimum reading is 0.1mm. By using the vernier you can record the po-
sition of the object on the slide by noting the readings on the scale. Repositioning
the slide to those readings makes locating the object very easy for future observa-
tions.
Focusing Device:
Coaxial coarse and fine focusing adjustment knobs are provided. Turning the coarse
focusing knobs raise the stage until it is stopped by the up stop. Then, looking
through the eyepiece, lower the stage by turning the coarse focusing knobs until you
find the object focused. To get sharper images, use the fine focusing knob. All the
objectives are made PAR-FOCAL. Once focusing is made with one objective, no re
-adjustment of focus by the coarse focusing knobs will be necessary when changing
to any other objective. To make the image sharpest, it may be necessary to make a
slight adjustment using the fine focusing knob.
The fine focus knob is graduated at both sides and each division corresponds to
0.004mm drive and one rotation of the fine focusing knob corresponds to 1.6mm
drive.
The tension control ring is located on the right side of
the coarse focus knob. The tightness of the coarse
focusing movement can be adjusted by turning this
ring using the C-Wrench. For instance, when you
change the sub stage condenser assembly to the phase
turret condenser, if you feel the need to adjust the ten-
sion of the coarse focusing movement, please use this
device.
- 6 -
Tension control ring
with C-wrench
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