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The total magnification can be roughly
calculated with the scale divisions on the
macrodual zoom:
The following factors have to be multiplied for
this:
– Magnification factor of the working distance
(scale (73.9), e. g. 0.11x)
– Zoom factor (scale (73.8), 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.
Use of the macrodual zoom as a drawing device
Drawing microstructures under the microscope
has the advantage over photomicrography that
significant details can be highlighted and that
structures can be depicted in three dimensions.
This is not possible with photomicrography.
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.