Dioptric Correction And Parfocality - Leica F12 I User Manual

Dioptric Correction and Parfocality

Leica stereomicroscopes are parfocally
matched. A prerequisite for this is the
correct setting of the diopters. The following
adjustments have to be carried out only once
by each user.
Therefore, all Leica eyepieces are also available
with built-in dioptric correction, allowing the
stereomicroscope to be used without glasses
even by those with vision problems. The correc-
tion comprises ±5 diopter settings.
Leica F12 I Floor Stand
Using the Dioptric Correction
1. Set the dioptric correction of both eyepieces
to the mid position ("0" diopter settings).
2. Look through the eyepieces and focus on a
flat specimen.
3. Rotate both eyepieces to the maximum
value of "+5".
4. Hold one eye closed and rotate the other
eyepiece in "-" direction until the specimen
appears sharp.
5. Then, open the other eye and correct the
diopter settings until the image is uniformly
sharp.
6. Select the highest magnification and refo-
cus if necessary.
Manual
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.
The system is now parfocally matched to your
eyes.
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