Leica DMLB Bedienungsanleitung Seite 71

Operation of macro device
The microscope illumination is left switched off
to avoid disturbing image brightening.
The object is placed on the stage under the
mirror housing of the macrodual zoom (51.11)
and illuminated.
Stand lamps, cold-light illuminators and fibre-
optic lamps, etc. are suitable light sources for
macroscopy.
The image is observed in the microscope tube
and focused by turning the knurled ring.
The magnification can be changed continuously
in a range of 1 : 4 by adjusting the knurled ring
(51.7).
When changing the magnification with the zoom
control the object may change position slightly
and go out of focus. It must then be refocused
and moved back into position.
The zoom magnification factors can be read on
the scale (51.8). The magnification also changes
when the distance between the object and the
macro attachment is varied.
The total magnification in the microscope, the
reproduction ratio on the photograph or TV
image can be quickly and easily measured with
a scale and calculated.
Important: For normal viewing without the
macro mirror housing or macrodual zoom, put on
the cover to avoid disturbing overlay effects.
The mirror housing (51.11) can be rotated
through 360°, for example to alter the angle at
which the photograph is taken. This is done by
loosening the Allen screw.
The intermediate image magnification M
macro object can be worked out from the
eyepiece field of view (see page 29) and the
diameter of the object field (measured with a
graduated ruler) as follows:
Magnification
field of view Ø
M = e.g.
1
object field Ø
Viewed with a 10x eyepiece, this intermediate
image of 0.125x gives a total magnification of
1.25x in the microscope eyepiece (0.125 x 10x =
1.25).
10x/25 eyepiece
M = 0.125
object field = 200 mm
of the
1
71