Optika Italy SZ Serie Mode D'emploi page 28

8.4 Focus lock lever (SZ-A6)
The lock lever serves as the focus memory function.
After focusing the sample, pull the lever ① towards
the front of the microscope and lock it. (Fig. 40).
This defines the upper focus point. Now you can
move the focus of the microscope with the coarse
knob, replace the sample and then bring the
system back to the upper point: the sample will be
approximately in focus and you will only have to
make a fine adjustment to obtain the optimal focus.
The micrometric movement is not affected by the
focus block.
• To remove the lock, move the lever in the
opposite direction to the one used for the
lock.
8.5 Dioptric compensation
• This compensation makes possible for peo-
ple wearing glasses to adjust the microscope
to their eyes and use the microscope without
glasses.
1. Put the zoom down to the lowest magnification ②
and focus the specimen with the focusing knobs
③. (Fig. 41)
2. Put the zoom to the maximum magnification and
repeat the focusing.
3. Return to the lowest magnification: the specimen
will be out of focus.
4. Adjust the diopter compensation ring of the right
eyepiece ④ (Fig. 42) until the image of the right
eyepiece is clear and sharp. Repeat the proce-
dure for the left eyepiece.
5. Check the focus of the image for the whole zoom
range. It should be perfectly parfocal (focus is
maintained during the change of magnification).
②
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①
F ig. 40 F ig. 40
③
F ig. 41 F ig. 41
④
F ig. 42 F ig. 42