Reichert Univar, User Manual

Page: 63 / 73

E7
Special cases
Point measurement
Normally, the light measurement is integrated, i.e.,
an average value of all brightnesses occurring in the
object is measured. When the button is switched on,
it is possible to select individual object details, which
are within the double circle, if the brightness of
specimen zones varies a lot. The orange light
indicates the switched on position.
Fluor button
⚫ With the "fluor" button, the measuring range for
the exposure time can be shifted by four exposure
stages in the direction of longer exposures. In fainter
preparations, such as fluorescence microscopy, or in
darkfield, this allows a measurement of exposure
time up to 8 hours (18 DIN). If, therefore, the pointer
is located in the left red zone, the measured
exposure time will be too short, and an exposure
adjustment is no longer possible. Press the "fluor"
key, and the pointer will move to the right so that
you can balance up to 8 hours.
⚫ During the measurement of the long exposure
times the format mirror must be switched off to
avoid affecting the measurement result.
⚫ The orange light indicates that the fluor button
has been pressed.
Double exposure
When working with the automatic small-format
camera, the film transport can be blocked by
pressing the "double exposure" button before
triggering the start button. By this means, the film
can be exposed several times.
Half-frame photographs
A slide with two half format panels can be inserted
into the relay, each covering one half of the image.
any image format can accommodate two shots.
Comparison shots of different or same objects in
different processes can be produced very easily.
The exposure setting takes place when the slide is
inserted, the exposure is performed while pressing
the factor 0.5 button.