Zeiss CIRRUS photo 600, Manual

Page: 51 / 106

Maintenance and care
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
Never allow your fingers to touch the part of the utensil used for
cleaning.
Hold the cloth between your fingers so they cannot touch the
surface of the lens accidentally.
Fig. 14 Cleaning with microfiber cloth
•
Similar to the LensPen, start in the center and make circular movements
over the lens surface.
•
Repeat this procedure several times, each time with a clean side of the
cloth.
•
Check the result by breathing on the lens and inspecting it for smudges
and streaks as described under
Checking on the progress of cleaning in
the following.
•
For fine cleaning, apply the cleaning disc of the LensPen (as described in
Dust removal , page 41).
Checking on the progress of cleaning
In the absence of a patient, instant information on cleaning progress can be
obtained by taking a photograph in the darkened room.
Before doing this, with the focusing aid switched on, turn the focusing knob
until the displayed focusing bar extends to the left edge.
Besides the typical spatial structures, no significant bright spots should be
visible in the resulting flash image. The pictures below (Fig. 15) show
examples of the image center (brighter due to post-treatment).