106
At the smallest zoom setting the drawing area
has a diameter of approx. 190 mm, at the highest
zoom setting approx. 48 mm with an eyepiece
field of view of 25 mm. For different fov numbers
the correction value is fov/25.
Auxiliary lens 2x
An auxiliary lens 2x can be screwed in under the
mirror (67.11) to magnify the field that is to be
imaged. This must be taken into account for the
above formula. This auxiliary lens 2x is
recommended for microscopic tracing as object
structures are shown twice as large.
Overlay of data and code numbers with the
VARICODE systems
The VARICODE system can be supplied together
with the macrodual zoom.
It allows code numbers, micron measurement
bars, ASTM grain size pictures and 35 mm nega-
tives to be overlaid on the microscope image.
Further details on how to use this system can be
found in the manual of the manufacturer, Leica
AG, Vienna. Not illustrated.
VARIMET digital measurement system
The VARIMET measurement system can be
connected to the reflection optics for the
measurement of microstructures. An adapter is
available on request. See manufacturer’s
manual (Leica AG, Vienna) for further details.
Linear measurements
The following are required for linear measure-
ments:
– Graticule with scale division in eyepiece
(Fig. 68) or Variotube DM RD HC (Fig. 33) or
diapositive overlay device (Fig. 66) or a digital
linear measuring eyepiece.
– Transmitted or incident light stage micrometer
for calibration.
The micrometer value of the objective-eyepiece
combination used must be known before the
measurement, i.e. the distance in the specimen
that corresponds to the length of a division on
the graticule used.
