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Leica M Stereomicroscopes – Operation
Adjusting diopter settings and parfocality
Leica stereomicroscopes are parfocally matched. This means
that, once you have focused on a feature in the manner de-
scribed, taking account of diopter settings, you can zoom the
magnification up and down without refocusing. You only need
to refocus if you want to look at higher or lower planes in the
object. A prerequisite is the correct setting of the diopters and
the parfocality.
• The dioptric range is from +5 to –5.
The following adjustments must be carried out only once by
each user. The procedures for adjusting the dioptric setting and
the parfocality are somewhat different if an eyepiece contains
a graticule. Refer to the user manuals for the MPS modular
photomicrographic systems or for measuring.
̈Install the lamp.
̈Set the interpupillary distance and,
if necessary, the viewing height.
̈On the video/phototube: Move the
lever to position "VIS" and open the
diaphragm.
̈Set the double-iris diaphragm to "OPEN."
̈Adjust the eyecups.
̈Set both eyepieces to zero.
̈Set the microscope carrier AX for
stereoscopic observation.
1. Place a flat test object under the
objective.
2. Engage the lowest magnification
position.
̈Use the coarse focusing drive to set
the working distance (page 16).
3. Look into the eyepieces
̈Use the focusing drive, to bring
the test object into focus.
Tips for your work
A Preparations
B Focus on the
test object