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IV. Using the microscope
Interpupillary adjustment
Adjust the two eyepiece tubes until only one circular field can be seen through the two
eyepieces. If two separate circles appear, the interpupillary distance is too large; if two
overlapping circles appear, the interpupillary distance is too small. The eyepiece tube
allows a flexible adjustment of the interpupillary distance between 54 and 76mm.
Focusing the microscope
To focus the sample, use the focusing knobs located on both sides of the head holder.
By turning these knobs, the microscope can be moved up or down a certain distance.
This movement is enabled by a “rack and pinion” mechanism.
Using the focusing knob, focus the sample until the image is clear. If the sample cannot
be brought into focus within the travel range of the S303/S304 pole arm and stand,
adjust the microscope head height along the vertical pillar to a working distance of
230mm from the sample. Remember to tighten the locking screw and support collar
after adjusting the height of the microscope.
Magnification and working distance
Change the optional eyepieces to increase or decrease magnification range.
Total magnification used can be calculated by multiplying the eyepiece magnification by
the objective lens magnification.
Increasing the working surface
The two gooseneck lights on this S41-20 microscope are flexible and can be directed in
many directions as needed to maximize the surface area covered by the microscope.
Likewise, the working arm can swing a full 360° to cover larger surface areas.
Adjusting the tension of focusing knob
A spanner is included in the packaging of SL41-20 for the focusing knob tension
adjustment. If necessary, use the spanner to adjust the tension.
