Leica DMLB Bedienungsanleitung Seite 72

The total magnification in the film plane of a
camera is derived
intermediate image magnification M
magnifications of the photo eyepiece and
camera attachment, e.g.:
intermediate image magnification 0.125x
photo projection lens 2.5x
large-format attachment 4x
0.125 x 2.5 x 4 = 1.25x
The total magnification at the 4 x 5" large-format
camera of the photo TV module would therefore
be 1.25x.
The total magnification can be roughly worked
out using the scale divisions on the macrodual
zoom:
The following factors are multiplied:
– magnification factor of the working distance
(scale 51.9, e.g. 0.11x)
– zoom factor (scale 51.8, e.g. 1x)
– correction factor of the reflection optics
(without engraving 1.17x)
– eyepiece magnification (e.g. 10x)
e.g. 0.11 x 1 x 1.17 x 10 = 1.29
The total magnification in the eyepiece would
therefore be 1.29x.
72
from multiplying
by the
1
Drawing
the
Using the macrodual zoom as a drawing device
Drawing microstructures under the microscope
has the advantages over photomicrography that
significant details can be highlighted and that
structures can be depicted in three dimensions.
Apart from this, drawing with the superimposed
image method is a valuable didactic exercise.
It is done by superimposing the drawing area
(the area of the stage under the mirror housing
of the macrodual zoom) onto the microscope
image. The drawing area or sheet of paper is
homogeneously illuminated with a stand lamp or
table lamp.
The microscope illumination and illumination of
the drawing area are matched providing the
lamps are adjustable; otherwise the brightness
of the drawing area can be varied by altering the
proximity of the lamp.