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20 I ENGLISH
5. To remove marks and oils, use lens cleaning fluid
and lens cleaning tissue to clean the mirror surface.
Apply the fluid to the tissue and gently wipe the
mirror surface. Use radial strokes (i.e. from the
center of the mirror to the edge). Use a new tissue
for every wipe. Avoid rubbing; this typically just
spreads oils around instead of removing them.
6. Once the mirror is clean, reinstall the mirror cell
into the telescope tube and replace the screws.
The secondary mirror will not get dirty often, as its optical
surface is pointed downward. However, if it does require
cleaning, it can be cleaned in the same manner as the
primary mirror. You do not need to remove the secondary
mirror from the telescope to clean it. Point the telescope
horizontally during cleaning to prevent anything from
falling onto the primary mirror.
You may clean the exposed optical surfaces of your
eyepieces in the same manner described above.
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