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8. Operation
Fig. 62 BDT25+ tube with digital camera
1 Control bar
1
Adjusting the viewing angle
• For the AET22 and EDT22 ergo tubes, the
viewing angle can be adjusted by tilting the
binocular eyepiece in the range of 5° – 32°
(Fig. 61).
Adjusting the eyepiece extension to the arm
length
• On the AET22 tube, the eyepieces can be ex-
tended up to 30 mm (Fig. 61).
Beamsplitting in photo tubes
EDT22 tube:
The light division between the observation and
documentation ports has a definite presetting
(50:50).
Fig. 61 Individual settings of the AET22 tube
BDT25+ tube:
The light division is set manually by pulling out a
control bar.
Control Bar Observation Photo
VIS 100 % 0 %
50/50 150 % 50 %
PHOTO 110 % 100 %
MBDT25+ tube:
This tube is similar to the documentation tube
BDT25+, but it is motorized.
The control positions are selected using a vari-
able function key on the stand.
HC L 2TU tube:
The light division is set manually by pulling out a
control bar.
Control Bar Observation Photo
VIS 100 % 0 %
PHOTO 110 % 100 %