18
V. 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. The tension of the
focusing knob can be adjusted using the tension knob located in the inner region of the
focusing knob on the right.
Using the focusing knob, focus the sample using the highest magnification strength. If
the sample cannot be brought into focus, adjust the height of the microscope along the
vertical pole. Remember to tighten the locking screw and support collar after adjusting
the height of the microscope.
Turn the zoom to the highest magnification. Adjust the focusing knob until a clear and
sharp image is obtained.
Turn the zoom to the lowest magnification. Adjust the right eyetube diopter until the
image seen through the right eyepiece is clear and sharp.
Repeat the procedure for the left eye tube. Next, check the image focus for the entire
zoom range; it should now be perfectly parfocal.
Using an auxiliary objective
To add an additional objective to the microscope, screw it onto the bottom part of the
stereo head. The height of the microscope must be re-adjusted as the working distance
will change when an additional objective is attached.
Magnification and working distance
Select the desired magnification strength by adjusting the zoom knob. Change the
optional eyepieces and/ or add an optional auxiliary objective to increase magnification
range.
Total magnification used can be calculated by multiplying the eyepiece magnification by
the zoom magnification and objective lens magnification.
Summary of Contents for S7 Series
Page 1: ...User Guide the S7 Stereo Microscope Series...
Page 7: ...6 The S7 T with plain stand Fig 2...
Page 8: ...7 The S7 B with single arm boom stand Fig 3...
Page 9: ...8 The S7 T with single arm boom stand Fig 4...
Page 10: ...9 The S7 B with dual arm boom stand Fig 5...
