Leica M205 FA user manual Dioptric Correction and Parfocality, Adjusting

Dioptric Correction and Parfocality

Leica stereomicroscopes are parfocally matched. The prerequisite for this is the correct setting of the diopters and the parfocality. The following adjustments only have to be carried out once by each user.

Preparations

ρρ Move the lever of the video/phototube to the "observation" position and open the diaphragm.

ρρ If you are using the microscope carrier AX, set it to stereoscopic observation.

Adjusting

1.Set the dioptric correction for both eyepieces to "0".

2.Select the lowest magnification and focus on a flat specimen.

3.Select the highest magnification and read- just the sharpness.

4.Select the lowest magnification again, but do not look into the eyepieces.

6.Rotate the eyepieces counterclockwise in the "+" direction as far as they will go (+5 diopter settings).

7.Look into the eyepieces.

8.Slowly rotate each eyepiece individually in the "–" direction until each eye sees the object sharply imaged.

9.Select the highest magnification and

refocus­ if necessary.

Now, if you adjust the magnification from the lowest to the highest level, the specimen is always brought into sharp focus. If not, repeat the process.

Leica M-series User Manual 78