The Askania 6Z stereomicroscope does not have stepless zoom, but has 6 precise click stops:
1.0.32x
2.0.63x
3.1x
4.3.2x
5.1.6x
6.1x (physically the same as click stop 3)
This should be defined in the optics editor like:
Note: the magnifications get sorted in ascending order.
Since the code labels refers to the index in the optics editor, the code labels should be arranged in the following sequence:
1.<1>
2.<2>
3.<3>
4.<5>
5.<4>
6.<3>