Viewing Tube Adjustment (cont.)
If you are comfortable wearing your 
corrective lenses (contact lenses or eyeglasses) for microscope viewing, leave them
on and your adjustments will be minimal.
2.Using the fine focus adjusting knob, focus on the specimen while looking through only one of the eyepieces (when using one eyepiece that is focusable and one that is not focusable, look through the one that is not focusable). To help focus, cover or close the other eye.
3.Now look with the other eye just through the other eyepiece (focusing eyepiece). This time, focus the specimen by using the focu- sing capability in the focusing eyepiece.
When doing so, do not change the height of the specimen stage.
4.Grip the knurled ring on the focusing eyepiece with one hand and rotate the top of the eyepiece with the other hand until the specimen is in focus for this eye and this focusing eyepiece. This corrects for any
vision differences between your right eye and left eye.
5.Now, switch to an objective with a high magnification level (no oil objective) and bring the microscope into focus while looking through the eyepieces with both eyes.
The higher magnifications have a shallo- 
wer depth of field. Therefore, after focus- ing with a high magnification, you will find that
when you change to lower magnifications, you only have to adjust the fine focus slightly, if at all.
ϘϘ If you use a DM750 with standard illumi- nation, continue with the "Oil Immersion Technique" section on page 40.
ϘϘ If your DM750 has a Koehler configuration, please continue with the next section, "Koehler Configuration", on page 38.
Leica DM750 | Manual | 37 |
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