Leica M205 User Manual download pdf (Page 26)

Leica M series Manual 26

Objective Nosepiece – Adjusting Parfocality

The following procedure only has to be carried

out once. Afterwards, both objectives are parfo-

cal, meaning that the specimen remains in focus

when the objective nosepiece is rotated.

This procedure must be repeated if you replace

either of the two objectives with another.

The following example assumes the combi-

nation of the 1× and 2× planapochromats. If

you are using another objective combination,

replace the 2× objective in the description with

the objective with the stronger magniﬁcation.

Preparation

Open the iris diaphragm. ★

Set the dioptric correction of the eyepieces ★

to "0".

Adjustment

1. Rotate the 2× objective into the beam path

and set it to the lowest magniﬁcation.

2. Focus on the specimen.

3. Rotate the 1× objective into the beam

path.

4. Turn the objective on the thread in both

directions until the specimen appears

sharp.

5. Toggle to the 2× objective.

6. Select the strongest magniﬁcation and

refocus until the specimen appears abso-

lutely sharp.

7. Toggle to the 1× objective.

8. Turn the objective on the thread in both

directions until the specimen appears

absolutely sharp.

By means of zooming, check that the behavior

of the objective is parfocal. Repeat the check

with the other objective. If it is not parfocal,

repeat the procedure.

9. Tighten the locking screws.

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