E
Cleaning Lenses
Some lenses have special coatings that are sensitive to solvents, grease, liquid and mechanical
abrasion. Take extra care when cleaning lenses with these coatings.
Lens assemblies consisting of several lenses are not normally sealed. Therefore, use as little
alcohol as possible, as it can get between the lenses and in doing so can change the properties of
projection.
Preferred
Procedure
1. Clean the lens by rubbing a new, dry cotton-swab over the surface using a
small circular movement.
2. Blow away any remaining lint with compressed air.
Procedure for
Stubborn Dirt
Use this procedure particularly when there is greasy dirt on the lens:
1. Moisten a new cotton-swab with isopropyl alcohol.
2. Clean the lens by rubbing the cotton-swab over the surface using a small
circular movement.
3. Using a new, dry cotton-swab remove the alcohol, any dissolved sediment
and dust.
4. Blow away any remaining lint with compressed air.
Cleaning Procedures E-9
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