KERN OSF-4, Инструкция пользователя

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OSF-4-BA-e-1510
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5.4 Dioptre adjustment and focussing
A special feature of stereo microscopes is that they are fitted with an optical unit
which has a relatively high depth of field. In order to be able get the most benefit from
this feature, each user must synchronise the focussing mechanisms for themselves.
The steps to do this are described in the following section.
1. Place the object to be observed on the surface under the objective.
2. Use the objective to set the smallest possible magnification.
3. Look through the righthand eyepiece (without dioptre adjustment ring) with the
right eye and bring the object into focus by using the focus control dials.
4. Now set the largest magnification.
5. Once again, still only looking through the righthand eyepiece, bring the object into
focus
6. Then set the smallest possible zoom factor again.
7. Then look through the lefthand eyepiece with the left eye (with dioptre adjustment
ring) and bring the object into focus, by turning the dioptre adjustment ring left or
right at the right point.
8. In order to get the highest level of accuracy when adjusting the focus, you should
repeat steps 4-7.
9. In this way, the object being observed will be in focus on any magnification
setting.